Establish native micro runtime checkpoint

23 files changed, 24454 insertions, 0 deletions

diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/complete.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/complete.json
new file mode 100644
index 0000000..0aa14f4
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/complete.json
@@ -0,0 +1,5 @@
+{
+  "samples": 240,
+  "all_output_hashes_match": true,
+  "finished_utc": "2026-09-22T12:24:32Z"
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/environment.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/environment.json
new file mode 100644
index 0000000..b2b8d87
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/environment.json
@@ -0,0 +1,57 @@
+{
+  "platform": "Linux-6.18.39+rpt-rpi-2712-aarch64-with-glibc2.41",
+  "machine": "aarch64",
+  "python": "3.14.7",
+  "cpu_affinity": 0,
+  "compiler": "cc (Debian 14.2.0-19) 14.2.0\nCopyright (C) 2024 Free Software Foundation, Inc.\nThis is free software; see the source for copying conditions.  There is NO\nwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n",
+  "builds": [
+    {
+      "command": [
+        "cc",
+        "-std=c17",
+        "-Wall",
+        "-Wextra",
+        "-Wpedantic",
+        "-Werror",
+        "-O2",
+        "-g",
+        "/home/eunhhu/work/pure/research/experiments/002-buffer-retention/benchmark.c",
+        "-o",
+        "/tmp/pure-retention-ktukd04y/bench"
+      ],
+      "stderr": "",
+      "sha256": "61e0dcf961714992da8d8f2846a09caeda95ce1ac183e2b82dbb80828c6ae43c",
+      "size_bytes": 101072
+    },
+    {
+      "command": [
+        "cc",
+        "-std=c17",
+        "-Wall",
+        "-Wextra",
+        "-Wpedantic",
+        "-Werror",
+        "-O2",
+        "-g",
+        "-fsanitize=address,undefined",
+        "-fno-omit-frame-pointer",
+        "/home/eunhhu/work/pure/research/experiments/002-buffer-retention/benchmark.c",
+        "-o",
+        "/tmp/pure-retention-ktukd04y/bench-sanitized"
+      ],
+      "stderr": "",
+      "sha256": "a4a383b9a31ec0d3cd2ac60a1697d863f0424a303608c69ed6faff969dd5d6de",
+      "size_bytes": 257680
+    }
+  ],
+  "source_sha256": {
+    "benchmark.c": "8ac37467fd01421f23924d0e92c890cc161dbd7b3d55642ce91d47e8f12a1e52",
+    "run.py": "f40df6109d1270afa3a3241b4d22c6842d3dbf360ccf3f563ec067df5f9b1fb3",
+    "plan.json": "0e07742173d3a415af1791e2d92b3ce9319152c3bca8dfbe6e3cd8de6e13a9f4"
+  },
+  "clock": "CLOCK_MONOTONIC; CPU = CLOCK_PROCESS_CPUTIME_ID",
+  "timing": "includes file IO, scheduling, deliberate sleep, metrics, buffer cleanup; excludes startup/build/fixture/verification",
+  "limitations": "shared host; unregulated thermals; cached files; output page cache, no fsync; synthetic closed-loop arrivals",
+  "started_utc": "2026-09-22T12:23:38Z",
+  "cpuinfo": "processor\t: 0\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 1\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 2\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 3\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nRevision\t: d04171\nSerial\t\t: d3ba8e625dbe42ac\nModel\t\t: Raspberry Pi 5 Model B Rev 1.1\n"
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/fixtures.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/fixtures.json
new file mode 100644
index 0000000..2fe2bb6
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/fixtures.json
@@ -0,0 +1,68 @@
+[
+  {
+    "path": "input.frames",
+    "shape": "sparse",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "161377ac76f4b7d35b13db7edf3b93bb279ddd83f6514051020e8b49e743d1c0",
+    "expected_output_bytes": 139264,
+    "expected_output_sha256": "a01c7bff45f73512f3bc0dbd02d7c3a1f4ceb09f574d7c25b926cd3d30bb1bfa",
+    "case": "sparse_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "sparse",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "161377ac76f4b7d35b13db7edf3b93bb279ddd83f6514051020e8b49e743d1c0",
+    "expected_output_bytes": 139264,
+    "expected_output_sha256": "a01c7bff45f73512f3bc0dbd02d7c3a1f4ceb09f574d7c25b926cd3d30bb1bfa",
+    "case": "sparse_slots64"
+  },
+  {
+    "path": "input.frames",
+    "shape": "dense",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "fb28c2da0af227079bd6888c3f549fa5a48abd0b790c3939dc330111e80c0b7f",
+    "expected_output_bytes": 100671488,
+    "expected_output_sha256": "d96dd7f80d696895e66521630fd30f13adabf63bea3b84b0a709fbc8c4095aa5",
+    "case": "dense_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "mixed",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 177631232,
+    "input_sha256": "5cfcb8e74d5f30c3a611f373ddf53fd5bc843841d83de42c763e1d931403521d",
+    "expected_output_bytes": 53735632,
+    "expected_output_sha256": "f6b4eb83e7ca9aa4b5b2e0675d34b656815c82c992700ee9cbd7e0a15594cb0b",
+    "case": "mixed_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "mixed",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 177631232,
+    "input_sha256": "5cfcb8e74d5f30c3a611f373ddf53fd5bc843841d83de42c763e1d931403521d",
+    "expected_output_bytes": 53735632,
+    "expected_output_sha256": "f6b4eb83e7ca9aa4b5b2e0675d34b656815c82c992700ee9cbd7e0a15594cb0b",
+    "case": "mixed_tight"
+  },
+  {
+    "path": "input.frames",
+    "shape": "sparse",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "161377ac76f4b7d35b13db7edf3b93bb279ddd83f6514051020e8b49e743d1c0",
+    "expected_output_bytes": 139264,
+    "expected_output_sha256": "a01c7bff45f73512f3bc0dbd02d7c3a1f4ceb09f574d7c25b926cd3d30bb1bfa",
+    "case": "sparse_fast"
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/plan.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/plan.json
new file mode 100644
index 0000000..23db315
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/plan.json
@@ -0,0 +1,113 @@
+{
+  "version": 2,
+  "written_before_measurement": true,
+  "revision_note": "The v1 run is preserved. Before this v2 run, RSS instrumentation was corrected and a 64-slot sparse sensitivity case was added after observing different queue occupancy. This is an exploratory follow-up, not a pre-registered confirmation.",
+  "seed": 20260922,
+  "repeats": 5,
+  "slots": 512,
+  "policies": [
+    {
+      "name": "borrow",
+      "policy": "borrow",
+      "pool": 1
+    },
+    {
+      "name": "copy",
+      "policy": "copy",
+      "pool": 1
+    },
+    {
+      "name": "threshold2",
+      "policy": "threshold",
+      "ratio": 2,
+      "pool": 1
+    },
+    {
+      "name": "threshold4",
+      "policy": "threshold",
+      "ratio": 4,
+      "pool": 1
+    },
+    {
+      "name": "threshold8",
+      "policy": "threshold",
+      "ratio": 8,
+      "pool": 1
+    },
+    {
+      "name": "pressure",
+      "policy": "pressure",
+      "pool": 1
+    },
+    {
+      "name": "project",
+      "policy": "project",
+      "pool": 1
+    },
+    {
+      "name": "copy_no_pool",
+      "policy": "copy",
+      "pool": 0
+    }
+  ],
+  "cases": [
+    {
+      "name": "sparse_slow",
+      "shape": "sparse",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "sparse_slots64",
+      "shape": "sparse",
+      "records": 2048,
+      "budget": 8388608,
+      "slots": 64,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "dense_slow",
+      "shape": "dense",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "mixed_slow",
+      "shape": "mixed",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "mixed_tight",
+      "shape": "mixed",
+      "records": 2048,
+      "budget": 2097152,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "sparse_fast",
+      "shape": "sparse",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 0,
+      "service_us": 0
+    }
+  ],
+  "expectations": [
+    "Borrow retains full source allocations for small selections.",
+    "Copy can add CPU and transient source plus destination memory for dense selections.",
+    "A current-pressure rule need not outperform a static size rule or early projection.",
+    "Pool reuse can reduce allocation calls while increasing reserved idle memory.",
+    "No Pure-specific advantage, application SLO, or statistical significance is presumed."
+  ],
+  "comparison_rule": "Report all presets and repetitions; no post-hoc winner is called an out-of-sample tuned policy.",
+  "limits": "Single FIFO local pipeline with synthetic delayed sink. No Sonic/Node/.NET benchmark, fan-out, persistent cache, generic JSON parser, external open-loop arrivals, or production SLO."
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.csv b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.csv
new file mode 100644
index 0000000..b9160ae
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.csv
@@ -0,0 +1,241 @@
+case,variant,repeat,status,policy,pool,budget_bytes,fixed_bytes,peak_reserved_bytes,peak_active_bytes,peak_queue,rss_peak_bytes,rusage_maxrss_bytes,rss_peak_source,elapsed_ns,cpu_ns,input_bytes,output_bytes,accepted,emitted,copy_bytes,copied_records,borrowed_records,pressure_copies,allocations,reuses,budget_waits,slot_waits,sleep_ns,latency_mean_ns,latency_p99_upper_ns,latency_max_ns,active_byte_seconds,live_at_stop_bytes,cached_at_stop_bytes,unreleased_buffer_bytes

+sparse_slow,copy,0,ok,copy,True,8388608,90560,197072,197072,512,1687552,27246592,linux_proc_vmhwm_approximate,160143537,26459012,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1524,137390253,34696998.27,41943040,41171715,6863.022101,0,66752,0

+sparse_slow,threshold4,0,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,157308101,31229598,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1480,130450222,33900498.29,41943040,39440182,6941.796558,0,66752,0

+sparse_slow,threshold2,0,ok,threshold,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,155496866,24536501,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1532,134789830,33617642.818,41943040,38582611,6573.377656,0,66752,0

+sparse_slow,copy_no_pool,0,ok,copy,False,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,155097886,24003453,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1537,135038766,33344720.225,41943040,38228742,6474.089644,0,0,0

+sparse_slow,project,0,ok,project,True,8388608,90560,131520,131520,512,1654784,27246592,linux_proc_vmhwm_approximate,154147870,24607892,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1536,133284576,33266783.578,37748736,37610633,5450.353596,0,1280,0

+sparse_slow,threshold8,0,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,159785538,24425471,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1534,139188295,34401146.148,41943040,40673920,6694.694537,0,66752,0

+sparse_slow,borrow,0,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,107974911,48356230,134242304,139264,2048,2048,0,0,2048,0,126,1922,1100,0,61689899,6299431.416,9437184,9257676,842052.147088,0,1048832,0

+sparse_slow,pressure,0,ok,pressure,True,8388608,90560,4321888,4318208,512,5832704,27246592,linux_proc_vmhwm_approximate,153730223,27269441,134242304,139264,2048,2048,113984,1781,267,1781,514,3315,0,1480,130232809,32945208.971,41943040,38336797,525465.223488,0,590528,0

+sparse_slow,borrow,1,ok,borrow,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,106374934,48221069,134242304,139264,2048,2048,0,0,2048,0,126,1922,1095,0,60129493,6201710.718,9437184,9283991,829040.966005,0,1048832,0

+sparse_slow,copy_no_pool,1,ok,copy,False,8388608,90560,197072,197072,512,1687552,27246592,linux_proc_vmhwm_approximate,160320037,25896167,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1525,138363559,34524425.147,41943040,40334217,6779.619735,0,0,0

+sparse_slow,threshold2,1,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,160914091,25835642,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1519,138817024,34925615.31,46137344,42672599,6869.973543,0,66752,0

+sparse_slow,threshold4,1,ok,threshold,True,8388608,90560,197072,197072,512,1687552,27246592,linux_proc_vmhwm_approximate,154184073,23590708,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134309537,33299901.746,37748736,37858502,6477.65682,0,66752,0

+sparse_slow,threshold8,1,ok,threshold,True,8388608,90560,197072,197072,512,1687552,27246592,linux_proc_vmhwm_approximate,154103999,23187579,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134573427,33283383.04,37748736,37891279,6458.021349,0,66752,0

+sparse_slow,project,1,ok,project,True,8388608,90560,131520,131520,512,1638400,27246592,linux_proc_vmhwm_approximate,157860470,28682548,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1516,133519836,34200243.611,41943040,39812385,5603.286251,0,1280,0

+sparse_slow,pressure,1,ok,pressure,True,8388608,90560,4321888,4316848,512,5849088,27246592,linux_proc_vmhwm_approximate,157264009,27287611,134242304,139264,2048,2048,113408,1772,276,1772,514,3306,0,1470,133795355,32665634.037,41943040,42380378,542285.660244,0,656000,0

+sparse_slow,copy,1,ok,copy,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,159054504,24707642,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1536,138332046,34466956.647,41943040,41828861,6705.336146,0,66752,0

+sparse_slow,threshold4,2,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,155128904,25543272,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1516,133541383,33533790.057,41943040,38416722,6610.674553,0,66752,0

+sparse_slow,copy_no_pool,2,ok,copy,False,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154376239,24141589,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1537,134070369,33348471.497,37748736,37918872,6490.973039,0,0,0

+sparse_slow,threshold2,2,ok,threshold,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,154320869,23690719,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134338369,33321815.102,37748736,37742483,6490.329618,0,66752,0

+sparse_slow,pressure,2,ok,pressure,True,8388608,90560,4321888,4318768,512,5832704,27246592,linux_proc_vmhwm_approximate,151916969,26295422,134242304,139264,2048,2048,114176,1784,264,1784,514,3318,0,1489,129297978,32537118.75,37748736,37291707,513114.693547,0,590528,0

+sparse_slow,copy,2,ok,copy,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154140610,23189876,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134662671,33298003.958,37748736,37866187,6456.771667,0,66752,0

+sparse_slow,project,2,ok,project,True,8388608,90560,131520,131520,512,1654784,27246592,linux_proc_vmhwm_approximate,154094443,24230112,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1537,133556453,33259314.794,37748736,37585114,5449.134094,0,1280,0

+sparse_slow,threshold8,2,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154652646,24092189,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1534,134423307,33402890.832,37748736,37866335,6511.54798,0,66752,0

+sparse_slow,borrow,2,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,129845439,45497318,134242304,139264,2048,2048,0,0,2048,0,126,1922,1501,0,87228642,7656609.5,9437184,9287806,1022546.229446,0,1048832,0

+sparse_slow,project,3,ok,project,True,8388608,90560,131520,131520,512,1638400,27246592,linux_proc_vmhwm_approximate,154249202,24700764,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1537,133261937,33273652.65,37748736,37535317,5451.483102,0,1280,0

+sparse_slow,borrow,3,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,137924379,44501920,134242304,139264,2048,2048,0,0,2048,0,126,1922,1704,0,96547980,8155969.084,9437184,9259085,1088953.248436,0,1048832,0

+sparse_slow,pressure,3,ok,pressure,True,8388608,90560,4321888,4318128,512,5849088,27246592,linux_proc_vmhwm_approximate,152102968,26353180,134242304,139264,2048,2048,113984,1781,267,1781,514,3315,0,1489,129366758,32586897.428,37748736,37391725,520107.889954,0,590528,0

+sparse_slow,threshold8,3,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154077370,23197132,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134591611,33277920.587,37748736,37816187,6453.368258,0,66752,0

+sparse_slow,threshold2,3,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154022055,23087202,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134592710,33270464.792,37748736,37834187,6450.425541,0,66752,0

+sparse_slow,copy,3,ok,copy,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,159640187,27408125,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1444,128856855,34666958.779,46137344,43466300,7402.36243,0,66752,0

+sparse_slow,copy_no_pool,3,ok,copy,False,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,155595440,25939365,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1537,134098060,33573592.059,41943040,37962687,6570.059349,0,0,0

+sparse_slow,threshold4,3,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,156340011,29539317,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1516,131960968,33615642.627,41943040,38156538,6719.71558,0,66752,0

+sparse_slow,copy_no_pool,4,ok,copy,False,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,162066143,36838768,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1413,131813978,34186582.359,46137344,44277743,7046.191505,0,0,0

+sparse_slow,copy,4,ok,copy,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,154776516,28160466,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1467,130788967,33183203.845,41943040,39792181,6689.95279,0,66752,0

+sparse_slow,threshold4,4,ok,threshold,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,154788109,23986070,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134524839,33403921.35,41943040,37878020,6520.274636,0,66752,0

+sparse_slow,threshold8,4,ok,threshold,True,8388608,90560,197072,197072,512,1720320,27246592,linux_proc_vmhwm_approximate,154198518,23692568,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1536,134186642,33304172.097,37748736,37802706,6492.439639,0,66752,0

+sparse_slow,borrow,4,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,141446795,44722082,134242304,139264,2048,2048,0,0,2048,0,126,1922,1729,0,99993943,8382742.796,9437184,9272177,1119170.099864,0,1048832,0

+sparse_slow,threshold2,4,ok,threshold,True,8388608,90560,197072,197072,512,1703936,27246592,linux_proc_vmhwm_approximate,154113537,24093342,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,133716023,33269305.586,37748736,37632576,6504.166448,0,66752,0

+sparse_slow,pressure,4,ok,pressure,True,8388608,90560,4321888,4318688,512,5849088,27246592,linux_proc_vmhwm_approximate,154850386,27901892,134242304,139264,2048,2048,114112,1783,265,1783,514,3317,0,1468,130766867,33232147.448,41943040,39951922,524904.925261,0,590528,0

+sparse_slow,project,4,ok,project,True,8388608,90560,131520,131520,512,1638400,27246592,linux_proc_vmhwm_approximate,157284342,26489150,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1510,134748166,33888730.885,41943040,39144776,5552.251467,0,1280,0

+sparse_slots64,project,0,ok,project,True,8388608,72640,77760,77760,64,1572864,27246592,linux_proc_vmhwm_approximate,167149794,26582076,134242304,139264,2048,2048,0,0,0,0,64,1984,0,1974,144371389,5130099.306,7864320,8958215,840.438441,0,1280,0

+sparse_slots64,threshold2,0,ok,threshold,True,8388608,72640,143312,143312,64,1622016,27246592,linux_proc_vmhwm_approximate,167663571,26966696,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1961,144092606,5142490.023,7864320,9061177,2058.951339,0,66752,0

+sparse_slots64,copy_no_pool,0,ok,copy,False,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,168181366,26871012,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1965,145357926,5163779.497,7864320,8918178,2024.80935,0,0,0

+sparse_slots64,borrow,0,ok,borrow,True,8388608,72640,4267968,4267968,64,5292032,27246592,linux_proc_vmhwm_approximate,167216739,43926056,134242304,139264,2048,2048,0,0,2048,0,64,1984,0,1888,126773157,5126680.831,7340032,7718922,688195.924843,0,1048832,0

+sparse_slots64,pressure,0,ok,pressure,True,8388608,72640,4268048,4268048,64,5767168,27246592,linux_proc_vmhwm_approximate,167185425,45108627,134242304,139264,2048,2048,2048,32,2016,32,65,2015,0,1714,125584463,5128742.545,6291456,6639537,677659.57207,0,1048832,0

+sparse_slots64,copy,0,ok,copy,True,8388608,72640,143312,143312,64,1622016,27246592,linux_proc_vmhwm_approximate,168358292,24933808,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,147266280,5168010.066,7864320,9057715,1951.688735,0,66752,0

+sparse_slots64,threshold4,0,ok,threshold,True,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,166820573,24630999,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,145973315,5129540.053,7864320,9056604,1927.278894,0,66752,0

+sparse_slots64,threshold8,0,ok,threshold,True,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,166777389,24643191,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1983,145938953,5126620.092,7864320,9062437,1926.54795,0,66752,0

+sparse_slots64,pressure,1,ok,pressure,True,8388608,72640,4268048,4268048,64,5783552,27246592,linux_proc_vmhwm_approximate,167023277,43214247,134242304,139264,2048,2048,2048,32,2016,32,65,2015,0,1923,127480383,5125737.978,7340032,8171940,677260.281048,0,1048832,0

+sparse_slots64,threshold2,1,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,167465182,25416979,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,146065308,5147482.869,7864320,9043937,1953.686249,0,66752,0

+sparse_slots64,threshold4,1,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,168266032,25648470,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,146554478,5170189.028,7864320,8853271,1979.901257,0,66752,0

+sparse_slots64,copy_no_pool,1,ok,copy,False,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,167352998,26167797,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1982,145161257,5140939.162,7864320,9037974,1975.871965,0,0,0

+sparse_slots64,threshold8,1,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,167352294,26149112,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,145164575,5140639.04,7864320,9055067,1998.899707,0,66752,0

+sparse_slots64,project,1,ok,project,True,8388608,72640,77760,77760,64,1589248,27246592,linux_proc_vmhwm_approximate,167537794,26582472,134242304,139264,2048,2048,0,0,0,0,64,1984,0,1983,144932270,5144362.881,7864320,9070492,842.776507,0,1280,0

+sparse_slots64,copy,1,ok,copy,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,177068451,34395657,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1964,148816905,5443811.067,9437184,9497139,2287.854324,0,66752,0

+sparse_slots64,borrow,1,ok,borrow,True,8388608,72640,4267968,4267968,64,5292032,27246592,linux_proc_vmhwm_approximate,169327288,47272489,134242304,139264,2048,2048,0,0,2048,0,64,1984,0,1559,125366124,5174744.393,7864320,7999125,694635.953387,0,1048832,0

+sparse_slots64,threshold4,2,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,166910296,25474992,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1982,145193155,5128818.551,7864320,9004900,1987.487947,0,66752,0

+sparse_slots64,copy_no_pool,2,ok,copy,False,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,167128888,26220522,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1980,144715144,5134877.701,7864320,9062770,2002.587942,0,0,0

+sparse_slots64,threshold2,2,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,167148609,25957735,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1977,145051954,5131955.022,7864320,9073752,1998.277517,0,66752,0

+sparse_slots64,threshold8,2,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,169611954,32276554,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1914,142094763,5206380.796,7864320,8901622,2300.08379,0,66752,0

+sparse_slots64,project,2,ok,project,True,8388608,72640,77760,77760,64,1589248,27246592,linux_proc_vmhwm_approximate,171072487,27568676,134242304,139264,2048,2048,0,0,0,0,64,1984,0,1973,147623196,5258257.061,7864320,9512213,861.43609,0,1280,0

+sparse_slots64,copy,2,ok,copy,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,169338770,27312589,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1973,146307420,5201400.59,7864320,9016640,2055.277015,0,66752,0

+sparse_slots64,pressure,2,ok,pressure,True,8388608,72640,4268048,4268048,64,5767168,27246592,linux_proc_vmhwm_approximate,170783358,46177893,134242304,139264,2048,2048,2048,32,2016,32,65,2015,0,1534,127950932,5236882.494,7340032,7222257,691939.11555,0,1048832,0

+sparse_slots64,borrow,2,ok,borrow,True,8388608,72640,4267968,4267968,64,5292032,27246592,linux_proc_vmhwm_approximate,167156999,43876108,134242304,139264,2048,2048,0,0,2048,0,64,1984,0,1884,127058453,5126798.896,6815744,6645517,688213.378653,0,1048832,0

+sparse_slots64,threshold4,3,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,166770166,25212214,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1984,145249611,5126749.497,7864320,9015048,1964.863682,0,66752,0

+sparse_slots64,copy,3,ok,copy,True,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,167909533,27850375,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1956,144091763,5137672.764,7864320,9072455,2094.171152,0,66752,0

+sparse_slots64,threshold8,3,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,168528180,32536976,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1897,140338194,5169990.139,7864320,8583716,2319.792062,0,66752,0

+sparse_slots64,copy_no_pool,3,ok,copy,False,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,166715000,24659146,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1984,145786851,5125611.619,7864320,9016234,1919.204343,0,0,0

+sparse_slots64,threshold2,3,ok,threshold,True,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,167074462,26663004,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1972,144308149,5134098.172,7864320,9056067,2041.253864,0,66752,0

+sparse_slots64,project,3,ok,project,True,8388608,72640,77760,77760,64,1572864,27246592,linux_proc_vmhwm_approximate,166784685,25542781,134242304,139264,2048,2048,0,0,0,0,64,1984,0,1985,144995208,5128089.141,7864320,9028215,840.114114,0,1280,0

+sparse_slots64,pressure,3,ok,pressure,True,8388608,72640,4268048,4268048,64,5750784,27246592,linux_proc_vmhwm_approximate,167121239,44137216,134242304,139264,2048,2048,2048,32,2016,32,65,2015,0,1831,126710351,5127462.262,7340032,7853292,677483.645644,0,1048832,0

+sparse_slots64,borrow,3,ok,borrow,True,8388608,72640,4267968,4267968,64,5292032,27246592,linux_proc_vmhwm_approximate,167212479,44714000,134242304,139264,2048,2048,0,0,2048,0,64,1984,0,1813,126101064,5127098.881,6291456,6795851,688253.763142,0,1048832,0

+sparse_slots64,threshold8,4,ok,threshold,True,8388608,72640,143312,143312,64,1622016,27246592,linux_proc_vmhwm_approximate,166717963,24687036,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1983,145714382,5125971.683,7864320,8962826,1940.992711,0,66752,0

+sparse_slots64,copy,4,ok,copy,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,166680851,24341624,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1985,146024444,5125321.995,7864320,9060326,1923.416256,0,66752,0

+sparse_slots64,threshold4,4,ok,threshold,True,8388608,72640,143312,143312,64,1654784,27246592,linux_proc_vmhwm_approximate,166829203,24368638,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1984,146127572,5127589.86,7864320,9064418,1922.285206,0,66752,0

+sparse_slots64,project,4,ok,project,True,8388608,72640,77760,77760,64,1589248,27246592,linux_proc_vmhwm_approximate,167505794,25505816,134242304,139264,2048,2048,0,0,0,0,64,1984,0,1985,145758292,5149157.839,7864320,9024826,843.565622,0,1280,0

+sparse_slots64,copy_no_pool,4,ok,copy,False,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,167165609,25932182,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1976,145075045,5133720.043,7864320,9029714,1986.249813,0,0,0

+sparse_slots64,borrow,4,ok,borrow,True,8388608,72640,4267968,4267968,64,5292032,27246592,linux_proc_vmhwm_approximate,167597886,45634483,134242304,139264,2048,2048,0,0,2048,0,64,1984,0,1768,125625299,5136396.266,7340032,8047606,689499.931113,0,1048832,0

+sparse_slots64,threshold2,4,ok,threshold,True,8388608,72640,143312,143312,64,1638400,27246592,linux_proc_vmhwm_approximate,166724425,24304145,134242304,139264,2048,2048,131072,2048,0,0,65,4031,0,1984,146112652,5125215.218,7864320,8987715,1915.595622,0,66752,0

+sparse_slots64,pressure,4,ok,pressure,True,8388608,72640,4268048,4268048,64,5750784,27246592,linux_proc_vmhwm_approximate,167102943,43204463,134242304,139264,2048,2048,2048,32,2016,32,65,2015,0,1902,127501222,5127130.23,7340032,7758552,677439.045656,0,1048832,0

+dense_slow,copy_no_pool,0,ok,copy,False,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,181746660,79318230,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1923,0,106431291,10743611.753,12582912,12983832,1442582.012105,0,0,0

+dense_slow,threshold4,0,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,161215386,89862451,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1244,0,73999062,9530310.653,11534336,11475412,1273441.862727,0,1048832,0

+dense_slow,pressure,0,ok,pressure,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,181545716,79933333,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1794,0,105524896,10805826.457,12582912,13598424,1442046.73663,0,1048832,0

+dense_slow,threshold2,0,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,179808887,82476393,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1739,0,101034766,10695483.804,12582912,13755645,1427516.577261,0,1048832,0

+dense_slow,copy,0,ok,copy,True,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,181070273,83392187,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1923,0,101645153,10688072.436,12582912,13270480,1435135.645514,0,1048832,0

+dense_slow,borrow,0,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,182712953,81359541,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1784,0,105215055,10867028.691,12582912,13321591,1450265.685197,0,1048832,0

+dense_slow,project,0,ok,project,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,187716865,74974355,134242304,100671488,2048,2048,0,0,0,0,126,1922,1885,0,116741671,11188037.068,12582912,13610887,1492582.952313,0,1048832,0

+dense_slow,threshold8,0,ok,threshold,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,177819652,80765616,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1732,0,100790270,10569593.51,12582912,12515889,1410709.704111,0,1048832,0

+dense_slow,copy_no_pool,1,ok,copy,False,8388608,90560,8350112,8350112,125,9469952,27246592,linux_proc_vmhwm_approximate,183713376,79010560,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1923,0,108825186,10852089.214,12582912,12891240,1457141.599471,0,0,0

+dense_slow,threshold8,1,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,181690178,80219667,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1787,0,105238489,10811191.05,12582912,13211998,1442791.441175,0,1048832,0

+dense_slow,project,1,ok,project,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,187516958,75386397,134242304,100671488,2048,2048,0,0,0,0,126,1922,1881,0,116242907,11180449.479,12582912,13778256,1491587.457419,0,1048832,0

+dense_slow,pressure,1,ok,pressure,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,181604364,78951924,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1764,0,106543831,10804561.506,12582912,13821367,1441898.713593,0,1048832,0

+dense_slow,copy,1,ok,copy,True,8388608,90560,8350112,8350112,125,9469952,27246592,linux_proc_vmhwm_approximate,162629252,88543490,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1913,0,77289755,9526763.21,12582912,13455924,1279274.820821,0,1048832,0

+dense_slow,threshold2,1,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,177629041,82100973,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1640,0,98770708,10557136.903,12582912,13384591,1409274.391678,0,1048832,0

+dense_slow,borrow,1,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,176146657,82398748,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1605,0,97290225,10456864.841,12582912,12598464,1395956.019109,0,1048832,0

+dense_slow,threshold4,1,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,177871837,82048383,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1692,0,99804043,10550904.139,12582912,13302146,1408308.914356,0,1048832,0

+dense_slow,copy,2,ok,copy,True,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,178298984,83177513,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1922,0,99077474,10508907.261,12582912,13207943,1411086.299499,0,1048832,0

+dense_slow,project,2,ok,project,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,181467845,82821089,134242304,100671488,2048,2048,0,0,0,0,126,1922,1672,0,102626015,10774249.202,12582912,12846870,1438045.689091,0,1048832,0

+dense_slow,threshold2,2,ok,threshold,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,133633132,106591389,134242304,100671488,2048,2048,0,0,2048,0,126,1922,396,0,28102711,7778565.752,11534336,12128873,1042347.024547,0,1048832,0

+dense_slow,threshold4,2,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,177934893,82638851,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1719,0,98938213,10577573.546,12582912,12061188,1411845.015325,0,1048832,0

+dense_slow,pressure,2,ok,pressure,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,180208516,83532190,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1755,0,100354141,10704952.958,11534336,11578059,1428781.613196,0,1048832,0

+dense_slow,copy_no_pool,2,ok,copy,False,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,185672333,80542923,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1923,0,109123678,10977524.849,12582912,13368332,1473966.510893,0,0,0

+dense_slow,threshold8,2,ok,threshold,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,184526170,78362511,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1834,0,110126299,10988073.928,12582912,13728757,1466214.025114,0,1048832,0

+dense_slow,borrow,2,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,186194683,78514601,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1865,0,111800399,11071491.94,12582912,13571164,1477291.36261,0,1048832,0

+dense_slow,project,3,ok,project,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,181552086,80699818,134242304,100671488,2048,2048,0,0,0,0,126,1922,1690,0,104861831,10716792.58,12582912,12527594,1430323.101776,0,1048832,0

+dense_slow,threshold2,3,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,176007991,84507344,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1626,0,94771244,10450519.416,12582912,13672942,1395156.109095,0,1048832,0

+dense_slow,threshold4,3,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,152737854,99861953,134242304,100671488,2048,2048,0,0,2048,0,126,1922,890,0,54158702,8983717.571,12582912,12746037,1201774.933886,0,1048832,0

+dense_slow,copy,3,ok,copy,True,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,184530299,78669541,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1923,0,109915619,10914646.174,12582912,13287517,1465541.553301,0,1048832,0

+dense_slow,copy_no_pool,3,ok,copy,False,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,133391651,112766017,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1523,0,20003852,7733517.169,11534336,11792151,1038602.867364,0,0,0

+dense_slow,borrow,3,ok,borrow,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,166473036,87150086,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1399,0,82606050,9857584.602,12582912,13713590,1316650.677161,0,1048832,0

+dense_slow,threshold8,3,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,154311406,92958406,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1082,0,62034758,9096496.741,11534336,11453763,1216142.805053,0,1048832,0

+dense_slow,pressure,3,ok,pressure,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,172422001,86572890,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1520,0,89162361,10222342.367,12582912,13171721,1365000.503032,0,1048832,0

+dense_slow,copy,4,ok,copy,True,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,182776175,83801034,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1923,0,102610607,10792342.655,12582912,13409628,1449128.406768,0,1048832,0

+dense_slow,project,4,ok,project,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,172321224,93701381,134242304,100671488,2048,2048,0,0,0,0,126,1922,1317,0,81313113,10121009.211,13631488,13629442,1352204.310615,0,1048832,0

+dense_slow,threshold8,4,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,161726717,90653564,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1291,0,73742733,9543033.955,12582912,13496479,1275079.33543,0,1048832,0

+dense_slow,copy_no_pool,4,ok,copy,False,8388608,90560,8350112,8350112,125,9486336,27246592,linux_proc_vmhwm_approximate,168343995,87047828,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1917,0,84775336,9903397.208,12582912,13360535,1329804.191236,0,0,0

+dense_slow,threshold4,4,ok,threshold,True,8388608,90560,8350112,8350112,126,9469952,27246592,linux_proc_vmhwm_approximate,150178547,91472405,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1089,0,61163642,8764951.531,12582912,12700278,1171761.488413,0,1048832,0

+dense_slow,borrow,4,ok,borrow,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,160544406,90636057,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1220,0,72541038,9456018.519,13631488,12662167,1263635.432461,0,1048832,0

+dense_slow,threshold2,4,ok,threshold,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,177206635,83537344,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1659,0,97328864,10529385.897,11534336,12256668,1405563.035864,0,1048832,0

+dense_slow,pressure,4,ok,pressure,True,8388608,90560,8350112,8350112,126,9486336,27246592,linux_proc_vmhwm_approximate,169205769,93894859,134242304,100671488,2048,2048,0,0,2048,0,126,1922,1358,0,77830920,9905630.789,14680064,15320344,1323477.613603,0,1048832,0

+mixed_slow,pressure,0,ok,pressure,True,8388608,90560,8388560,8388448,351,11059200,27246592,linux_proc_vmhwm_approximate,157820358,72816171,177631232,53735632,2048,2048,27916032,1699,349,1699,2118,1629,983,0,87435519,20627967.734,27262976,27848623,1145134.388634,0,522496,0

+mixed_slow,project,0,ok,project,True,8388608,90560,8388608,8388608,359,11059200,27246592,linux_proc_vmhwm_approximate,152663243,58871841,177631232,53735632,2048,2048,0,0,0,0,1712,336,1020,0,96564951,20645944.552,29360128,28536362,1105768.632536,0,458688,0

+mixed_slow,threshold8,0,ok,threshold,True,8388608,90560,8388480,8388432,218,10928128,27246592,linux_proc_vmhwm_approximate,154865144,68111825,177631232,53735632,2048,2048,3824848,1008,1040,0,1854,1202,1088,0,89372126,12505668.119,15728640,16314249,1173514.267706,0,1250624,0

+mixed_slow,copy_no_pool,0,ok,copy,False,8388608,90560,8388544,8388544,351,11042816,27246592,linux_proc_vmhwm_approximate,147730720,59461567,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1091,0,90844456,19373026.656,27262976,27720475,1058083.377077,0,0,0

+mixed_slow,threshold4,0,ok,threshold,True,8388608,90560,8388608,8388608,284,11042816,27246592,linux_proc_vmhwm_approximate,154278831,65116485,177631232,53735632,2048,2048,11229392,1357,691,0,1939,1466,1101,0,91754428,15979998.057,20971520,21200642,1146944.244493,0,1153216,0

+mixed_slow,copy,0,ok,copy,True,8388608,90560,8388576,8388432,351,11583488,27246592,linux_proc_vmhwm_approximate,148231627,61867221,177631232,53735632,2048,2048,53727440,2048,0,0,2282,1814,1066,0,88853774,19421431.677,27262976,27565124,1061176.084143,0,522496,0

+mixed_slow,threshold2,0,ok,threshold,True,8388608,90560,8388560,8388432,351,11583488,27246592,linux_proc_vmhwm_approximate,151434543,63073539,177631232,53735632,2048,2048,28479696,1740,308,0,2181,1607,1055,0,90878850,19880247.948,27262976,27687586,1085460.729712,0,522496,0

+mixed_slow,borrow,0,ok,borrow,True,8388608,90560,8386736,8386688,112,11042816,27246592,linux_proc_vmhwm_approximate,155306143,76020257,177631232,53735632,2048,2048,0,0,2048,0,1309,739,1057,0,81695551,6922951.601,9437184,8980622,1223077.166921,0,667904,0

+mixed_slow,copy,1,ok,copy,True,8388608,90560,8388560,8388432,350,11059200,27246592,linux_proc_vmhwm_approximate,160379239,76853903,177631232,53735632,2048,2048,53727440,2048,0,0,2142,1954,945,0,86445280,20559126.612,31457280,31399761,1126649.918907,0,519424,0

+mixed_slow,threshold2,1,ok,threshold,True,8388608,90560,8388560,8388432,351,11059200,27246592,linux_proc_vmhwm_approximate,154875385,62824900,177631232,53735632,2048,2048,28479696,1740,308,0,2184,1604,1064,0,94824069,20387628.756,29360128,28330122,1114766.522227,0,522496,0

+mixed_slow,borrow,1,ok,borrow,True,8388608,90560,8386736,8386688,112,11059200,27246592,linux_proc_vmhwm_approximate,160560980,82185381,177631232,53735632,2048,2048,0,0,2048,0,1298,750,1014,0,81045212,7165375.219,9437184,9128899,1265871.620641,0,667904,0

+mixed_slow,threshold8,1,ok,threshold,True,8388608,90560,8388480,8388432,218,10895360,27246592,linux_proc_vmhwm_approximate,158376930,70010099,177631232,53735632,2048,2048,3824848,1008,1040,0,1840,1216,1069,0,91117649,12818618.589,16777216,16509452,1202455.090015,0,1250624,0

+mixed_slow,threshold4,1,ok,threshold,True,8388608,90560,8388608,8388608,284,11059200,27246592,linux_proc_vmhwm_approximate,158364004,67436217,177631232,53735632,2048,2048,11229392,1357,691,0,1915,1490,1082,0,93660619,16427087.508,23068672,21701826,1180098.881536,0,1153216,0

+mixed_slow,pressure,1,ok,pressure,True,8388608,90560,8388560,8388432,351,11059200,27246592,linux_proc_vmhwm_approximate,150598212,62794080,177631232,53735632,2048,2048,27916032,1699,349,1699,2194,1553,1045,0,90472858,19666383.09,27262976,27539921,1091553.931133,0,522496,0

+mixed_slow,copy_no_pool,1,ok,copy,False,8388608,90560,8388432,8388432,351,11042816,27246592,linux_proc_vmhwm_approximate,147750665,60136047,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1079,0,90065234,19383039.199,27262976,27513476,1059302.637881,0,0,0

+mixed_slow,project,1,ok,project,True,8388608,90560,8388608,8388608,359,11583488,27246592,linux_proc_vmhwm_approximate,161035903,71350453,177631232,53735632,2048,2048,0,0,0,0,1684,364,940,0,92840414,21900800.478,31457280,29845877,1171929.531923,0,458688,0

+mixed_slow,copy_no_pool,2,ok,copy,False,8388608,90560,8388432,8388432,344,11059200,27246592,linux_proc_vmhwm_approximate,156784527,75333533,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,936,0,83839404,20060454.119,27262976,27533828,1101855.462406,0,0,0

+mixed_slow,project,2,ok,project,True,8388608,90560,8388608,8388608,359,11042816,27246592,linux_proc_vmhwm_approximate,155323458,61447221,177631232,53735632,2048,2048,0,0,0,0,1698,350,1001,0,96575508,21013565.399,29360128,28307510,1125180.461018,0,458688,0

+mixed_slow,copy,2,ok,copy,True,8388608,90560,8388576,8388544,351,11583488,27246592,linux_proc_vmhwm_approximate,148908587,62691660,177631232,53735632,2048,2048,53727440,2048,0,0,2295,1801,1060,0,88867276,19542842.845,27262976,27366569,1068483.42084,0,522496,0

+mixed_slow,threshold8,2,ok,threshold,True,8388608,90560,8388480,8388432,218,10895360,27246592,linux_proc_vmhwm_approximate,155250569,68193969,177631232,53735632,2048,2048,3824848,1008,1040,0,1856,1200,1091,0,89649032,12540132.329,15728640,16196379,1176609.476886,0,1250624,0

+mixed_slow,threshold4,2,ok,threshold,True,8388608,90560,8388608,8388608,284,11059200,27246592,linux_proc_vmhwm_approximate,153993443,64368954,177631232,53735632,2048,2048,11229392,1357,691,0,1951,1454,1113,0,92271541,15971202.74,20971520,20927051,1146423.83916,0,1153216,0

+mixed_slow,borrow,2,ok,borrow,True,8388608,90560,8386736,8386688,112,11059200,27246592,linux_proc_vmhwm_approximate,156530676,80398481,177631232,53735632,2048,2048,0,0,2048,0,1289,759,1012,0,78480840,6972909.934,9437184,9059956,1232378.631527,0,667904,0

+mixed_slow,threshold2,2,ok,threshold,True,8388608,90560,8388560,8388432,351,11010048,27246592,linux_proc_vmhwm_approximate,150924192,62137633,177631232,53735632,2048,2048,28479696,1740,308,0,2185,1603,1066,0,91396144,19908205.041,27262976,27188866,1087150.034862,0,522496,0

+mixed_slow,pressure,2,ok,pressure,True,8388608,90560,8388560,8388432,351,11042816,27246592,linux_proc_vmhwm_approximate,151817449,63923421,177631232,53735632,2048,2048,27916032,1699,349,1699,2188,1559,1043,0,90636475,19811286.8,27262976,27547513,1100686.98981,0,522496,0

+mixed_slow,pressure,3,ok,pressure,True,8388608,90560,8388560,8388432,351,11059200,27246592,linux_proc_vmhwm_approximate,150346490,61910200,177631232,53735632,2048,2048,27916032,1699,349,1699,2191,1556,1052,0,90957629,19620014.043,27262976,27598753,1088594.710179,0,522496,0

+mixed_slow,borrow,3,ok,borrow,True,8388608,90560,8386736,8386736,112,11059200,27246592,linux_proc_vmhwm_approximate,154664385,75260445,177631232,53735632,2048,2048,0,0,2048,0,1309,739,1060,0,81727723,6891592.543,9437184,9042474,1217311.080951,0,667904,0

+mixed_slow,copy_no_pool,3,ok,copy,False,8388608,90560,8388448,8388448,351,11583488,27246592,linux_proc_vmhwm_approximate,149074586,62457772,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1070,0,89108781,19570212.309,27262976,27735827,1068598.834234,0,0,0

+mixed_slow,threshold2,3,ok,threshold,True,8388608,90560,8388560,8388448,351,11010048,27246592,linux_proc_vmhwm_approximate,151416673,62409227,177631232,53735632,2048,2048,28479696,1740,308,0,2196,1592,1072,0,91608903,19945957.829,27262976,27499217,1089269.648492,0,522496,0

+mixed_slow,threshold8,3,ok,threshold,True,8388608,90560,8388480,8388432,218,10928128,27246592,linux_proc_vmhwm_approximate,154832681,68708379,177631232,53735632,2048,2048,3824848,1008,1040,0,1844,1212,1080,0,88746131,12500210.727,15728640,16133805,1173410.180784,0,1250624,0

+mixed_slow,threshold4,3,ok,threshold,True,8388608,90560,8388608,8388608,284,11059200,27246592,linux_proc_vmhwm_approximate,153954221,64939588,177631232,53735632,2048,2048,11229392,1357,691,0,1938,1467,1106,0,91640646,15956645.429,20971520,20876513,1145843.306835,0,1153216,0

+mixed_slow,copy,3,ok,copy,True,8388608,90560,8388576,8388432,348,11026432,27246592,linux_proc_vmhwm_approximate,154316312,71405240,177631232,53735632,2048,2048,53727440,2048,0,0,2185,1911,984,0,85159635,20042799.471,27262976,27766253,1098260.452799,0,522496,0

+mixed_slow,project,3,ok,project,True,8388608,90560,8388608,8388608,359,11567104,27246592,linux_proc_vmhwm_approximate,153157278,59550541,177631232,53735632,2048,2048,0,0,0,0,1715,333,1025,0,96249111,20737608.082,29360128,28456288,1110823.213775,0,458688,0

+mixed_slow,copy,4,ok,copy,True,8388608,90560,8388576,8388432,351,11583488,27246592,linux_proc_vmhwm_approximate,148559421,60872675,177631232,53735632,2048,2048,53727440,2048,0,0,2291,1805,1082,0,90209021,19484771.246,27262976,27464198,1064901.546602,0,522496,0

+mixed_slow,threshold2,4,ok,threshold,True,8388608,90560,8388560,8388432,351,11042816,27246592,linux_proc_vmhwm_approximate,152463225,62941260,177631232,53735632,2048,2048,28479696,1740,308,0,2190,1598,1076,0,92180791,20063222.989,27262976,27720123,1096182.913762,0,522496,0

+mixed_slow,project,4,ok,project,True,8388608,90560,8388608,8388608,359,11567104,27246592,linux_proc_vmhwm_approximate,156226158,60922941,177631232,53735632,2048,2048,0,0,0,0,1712,336,1009,0,98129027,21028903.054,31457280,30198524,1124769.099854,0,458688,0

+mixed_slow,threshold8,4,ok,threshold,True,8388608,90560,8388480,8388432,218,10534912,27246592,linux_proc_vmhwm_approximate,159080169,72479922,177631232,53735632,2048,2048,3824848,1008,1040,0,1823,1233,1052,0,89038311,12767575.616,16777216,17017117,1198559.835478,0,1250624,0

+mixed_slow,borrow,4,ok,borrow,True,8388608,90560,8386736,8386688,112,11059200,27246592,linux_proc_vmhwm_approximate,160859182,83693169,177631232,53735632,2048,2048,0,0,2048,0,1286,762,998,0,79719697,7168367.113,9437184,9348362,1265838.726396,0,667904,0

+mixed_slow,copy_no_pool,4,ok,copy,False,8388608,90560,8388432,8388432,350,11059200,27246592,linux_proc_vmhwm_approximate,153665517,63556619,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1061,0,92811834,20225367.343,29360128,27663216,1106709.142867,0,0,0

+mixed_slow,threshold4,4,ok,threshold,True,8388608,90560,8388608,8388608,284,11059200,27246592,linux_proc_vmhwm_approximate,154918866,67062426,177631232,53735632,2048,2048,11229392,1357,691,0,1917,1488,1084,0,90513202,16065937.041,20971520,20956347,1153471.713074,0,1153216,0

+mixed_slow,pressure,4,ok,pressure,True,8388608,90560,8388560,8388432,351,11026432,27246592,linux_proc_vmhwm_approximate,150607823,62564984,177631232,53735632,2048,2048,27916032,1699,349,1699,2185,1562,1048,0,90639036,19672453.154,27262976,27555809,1091824.795529,0,522496,0

+mixed_tight,pressure,0,ok,pressure,True,2097152,90560,2097136,2097136,113,4243456,27246592,linux_proc_vmhwm_approximate,190186189,62042049,177631232,53735632,2048,2048,28385168,1727,321,1727,2373,1402,1378,0,130967488,6127305.056,8388608,9614324,346183.559002,0,523712,0

+mixed_tight,project,0,ok,project,True,2097152,90560,2097120,2097120,118,4227072,27246592,linux_proc_vmhwm_approximate,175306603,59313331,177631232,53735632,2048,2048,0,0,0,0,1720,328,1300,0,118791611,6273925.584,8388608,8853437,326279.178906,0,406848,0

+mixed_tight,threshold4,0,ok,threshold,True,2097152,90560,2097136,2097104,88,4227072,27246592,linux_proc_vmhwm_approximate,225451606,64792167,177631232,53735632,2048,2048,11229392,1357,691,0,2134,1271,1457,0,163697658,5851904.688,7864320,10247748,413690.587373,0,435392,0

+mixed_tight,copy,0,ok,copy,True,2097152,90560,2097152,2097136,115,4227072,27246592,linux_proc_vmhwm_approximate,191774166,62795054,177631232,53735632,2048,2048,53727440,2048,0,0,2467,1629,1361,0,131825729,6045168.869,8388608,8688826,346452.547175,0,523712,0

+mixed_tight,copy_no_pool,0,ok,copy,False,2097152,90560,2097136,2097136,107,4243456,27246592,linux_proc_vmhwm_approximate,195726691,69455356,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1284,0,128917157,6157981.172,9437184,9013123,353204.287515,0,0,0

+mixed_tight,threshold8,0,ok,threshold,True,2097152,90560,2097152,2097136,73,4227072,27246592,linux_proc_vmhwm_approximate,284917692,71405280,177631232,53735632,2048,2048,3824848,1008,1040,0,1986,1070,1377,0,216762211,5735627.926,7864320,9131844,525336.273255,0,386176,0

+mixed_tight,borrow,0,ok,borrow,True,2097152,90560,2094128,2094128,40,3702784,27246592,linux_proc_vmhwm_approximate,493631884,81275705,177631232,53735632,2048,2048,0,0,2048,0,1338,710,1381,0,416164894,5487868.994,8388608,10310562,930117.776585,0,495872,0

+mixed_tight,threshold2,0,ok,threshold,True,2097152,90560,2097136,2097136,115,4227072,27246592,linux_proc_vmhwm_approximate,188818619,63133028,177631232,53735632,2048,2048,28479696,1740,308,0,2370,1418,1385,0,128526332,6127166.122,8388608,8910974,342945.952067,0,523712,0

+mixed_tight,project,1,ok,project,True,2097152,90560,2097120,2097120,118,4243456,27246592,linux_proc_vmhwm_approximate,179280258,63072197,177631232,53735632,2048,2048,0,0,0,0,1706,342,1292,0,119263134,6405571.191,9437184,9266621,333023.673744,0,406848,0

+mixed_tight,threshold8,1,ok,threshold,True,2097152,90560,2097136,2097136,72,4358144,27246592,linux_proc_vmhwm_approximate,289852215,73110582,177631232,53735632,2048,2048,3824848,1008,1040,0,1968,1088,1366,0,216619289,5811531.61,10485760,14653198,533913.89253,0,386176,0

+mixed_tight,copy_no_pool,1,ok,copy,False,2097152,90560,2097136,2097136,117,4243456,27246592,linux_proc_vmhwm_approximate,192676756,64089681,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1353,0,131367991,6074626.45,9437184,9595565,347823.24917,0,0,0

+mixed_tight,pressure,1,ok,pressure,True,2097152,90560,2097136,2097136,115,4456448,27246592,linux_proc_vmhwm_approximate,190841576,65297407,177631232,53735632,2048,2048,28385168,1727,321,1727,2364,1411,1367,0,128364836,6138653.731,8388608,9614713,347120.008423,0,523712,0

+mixed_tight,copy,1,ok,copy,True,2097152,90560,2097152,2097136,114,4407296,27246592,linux_proc_vmhwm_approximate,191186483,62157319,177631232,53735632,2048,2048,53727440,2048,0,0,2461,1635,1369,0,131673734,6044094.394,8388608,8856067,346056.920887,0,523712,0

+mixed_tight,threshold2,1,ok,threshold,True,2097152,90560,2097136,2097136,116,4227072,27246592,linux_proc_vmhwm_approximate,189607302,65204064,177631232,53735632,2048,2048,28479696,1740,308,0,2354,1434,1374,0,127228274,6129531.969,8388608,8917400,344084.726971,0,523712,0

+mixed_tight,threshold4,1,ok,threshold,True,2097152,90560,2097136,2097104,88,4227072,27246592,linux_proc_vmhwm_approximate,225029662,63936677,177631232,53735632,2048,2048,11229392,1357,691,0,2132,1273,1459,0,164083415,5845044.948,7864320,10255656,413025.125756,0,435392,0

+mixed_tight,borrow,1,ok,borrow,True,2097152,90560,2094128,2094128,40,3719168,27246592,linux_proc_vmhwm_approximate,493081274,77876795,177631232,53735632,2048,2048,0,0,2048,0,1342,706,1396,0,417981885,5480641.02,8388608,9914990,929020.44715,0,495872,0

+mixed_tight,borrow,2,ok,borrow,True,2097152,90560,2094128,2094128,40,4243456,27246592,linux_proc_vmhwm_approximate,491778453,73168533,177631232,53735632,2048,2048,0,0,2048,0,1352,696,1408,0,421825716,5473786.015,8388608,9925323,926994.460577,0,495872,0

+mixed_tight,threshold2,2,ok,threshold,True,2097152,90560,2097136,2097136,114,4243456,27246592,linux_proc_vmhwm_approximate,188770790,62771264,177631232,53735632,2048,2048,28479696,1740,308,0,2380,1408,1395,0,128898177,6126984.319,8388608,8906435,343018.464235,0,523712,0

+mixed_tight,copy_no_pool,2,ok,copy,False,2097152,90560,2097136,2097136,116,4227072,27246592,linux_proc_vmhwm_approximate,189986910,58086718,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1383,0,134499200,6008153.507,8388608,8893917,343741.458999,0,0,0

+mixed_tight,project,2,ok,project,True,2097152,90560,2097120,2097120,118,4243456,27246592,linux_proc_vmhwm_approximate,174670169,55539698,177631232,53735632,2048,2048,0,0,0,0,1727,321,1312,0,121848710,6258533.417,8388608,8834323,325246.46456,0,406848,0

+mixed_tight,pressure,2,ok,pressure,True,2097152,90560,2097136,2097136,117,4227072,27246592,linux_proc_vmhwm_approximate,193714972,64286995,177631232,53735632,2048,2048,28385168,1727,321,1727,2353,1422,1371,0,132496502,6233962.195,10485760,11493286,352390.15124,0,523712,0

+mixed_tight,copy,2,ok,copy,True,2097152,90560,2097136,2097136,115,4243456,27246592,linux_proc_vmhwm_approximate,191684197,62544845,177631232,53735632,2048,2048,53727440,2048,0,0,2479,1617,1373,0,131979930,6064467.489,8388608,8905416,346663.433689,0,523712,0

+mixed_tight,threshold4,2,ok,threshold,True,2097152,90560,2097136,2097104,88,4227072,27246592,linux_proc_vmhwm_approximate,229047558,67894565,177631232,53735632,2048,2048,11229392,1357,691,0,2094,1311,1425,0,164358967,5921381.751,7864320,10252296,418976.246455,0,435392,0

+mixed_tight,threshold8,2,ok,threshold,True,2097152,90560,2097136,2097136,72,4243456,27246592,linux_proc_vmhwm_approximate,283681970,69888728,177631232,53735632,2048,2048,3824848,1008,1040,0,1987,1069,1378,0,217008850,5688342.625,7340032,9247808,522809.985389,0,386176,0

+mixed_tight,threshold2,3,ok,threshold,True,2097152,90560,2097152,2097136,102,4325376,27246592,linux_proc_vmhwm_approximate,201965490,80116546,177631232,53735632,2048,2048,28479696,1740,308,0,2291,1497,1275,0,123310392,6483685.515,10485760,11156636,364031.028759,0,493440,0

+mixed_tight,borrow,3,ok,borrow,True,2097152,90560,2094128,2094128,40,3719168,27246592,linux_proc_vmhwm_approximate,494160071,76904068,177631232,53735632,2048,2048,0,0,2048,0,1346,702,1397,0,420872435,5490372.664,8388608,9952646,930733.63783,0,495872,0

+mixed_tight,copy,3,ok,copy,True,2097152,90560,2097152,2097136,117,4243456,27246592,linux_proc_vmhwm_approximate,191245856,61096231,177631232,53735632,2048,2048,53727440,2048,0,0,2481,1615,1387,0,132860200,6056702.267,8388608,8733304,346194.049558,0,523712,0

+mixed_tight,project,3,ok,project,True,2097152,90560,2097120,2097120,118,4407296,27246592,linux_proc_vmhwm_approximate,174872810,56429902,177631232,53735632,2048,2048,0,0,0,0,1726,322,1310,0,121198578,6260365.932,8388608,8926676,325635.507331,0,406848,0

+mixed_tight,threshold4,3,ok,threshold,True,2097152,90560,2097136,2097104,88,4243456,27246592,linux_proc_vmhwm_approximate,224725167,63560757,177631232,53735632,2048,2048,11229392,1357,691,0,2132,1273,1456,0,164191839,5841515.207,7864320,10276240,412794.10328,0,435392,0

+mixed_tight,threshold8,3,ok,threshold,True,2097152,90560,2097136,2097136,73,4227072,27246592,linux_proc_vmhwm_approximate,283036048,73067755,177631232,53735632,2048,2048,3824848,1008,1040,0,1972,1084,1379,0,213650376,5678436.735,7864320,9220899,521434.266403,0,386176,0

+mixed_tight,pressure,3,ok,pressure,True,2097152,90560,2097136,2097136,113,4456448,27246592,linux_proc_vmhwm_approximate,189790379,60625611,177631232,53735632,2048,2048,28385168,1727,321,1727,2369,1406,1393,0,131820061,6110038.652,8388608,9522938,345327.900203,0,523712,0

+mixed_tight,copy_no_pool,3,ok,copy,False,2097152,90560,2097136,2097136,115,4243456,27246592,linux_proc_vmhwm_approximate,192179115,71826579,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1293,0,123142369,6044858.508,8388608,8899841,346584.591442,0,0,0

+mixed_tight,project,4,ok,project,True,2097152,90560,2097120,2097120,118,4227072,27246592,linux_proc_vmhwm_approximate,175527737,57919540,177631232,53735632,2048,2048,0,0,0,0,1728,320,1310,0,120470904,6282412.787,9437184,8759229,326547.492623,0,406848,0

+mixed_tight,threshold2,4,ok,threshold,True,2097152,90560,2097136,2097136,113,4243456,27246592,linux_proc_vmhwm_approximate,188314755,61699247,177631232,53735632,2048,2048,28479696,1740,308,0,2377,1411,1394,0,129399417,6110229.914,8388608,8949046,342240.604823,0,523712,0

+mixed_tight,threshold8,4,ok,threshold,True,2097152,90560,2097136,2097136,72,4243456,27246592,linux_proc_vmhwm_approximate,282255055,67344177,177631232,53735632,2048,2048,3824848,1008,1040,0,1990,1066,1394,0,217945110,5670280.355,7340032,9286807,520513.491017,0,386176,0

+mixed_tight,copy,4,ok,copy,True,2097152,90560,2097136,2097136,116,4243456,27246592,linux_proc_vmhwm_approximate,191037345,60906478,177631232,53735632,2048,2048,53727440,2048,0,0,2491,1605,1378,0,132768233,6050681.287,8388608,8878730,345866.556263,0,523712,0

+mixed_tight,threshold4,4,ok,threshold,True,2097152,90560,2097136,2097104,88,4227072,27246592,linux_proc_vmhwm_approximate,226976916,67053797,177631232,53735632,2048,2048,11229392,1357,691,0,2113,1292,1429,0,163248630,5888077.344,8388608,10246777,416261.40193,0,435392,0

+mixed_tight,borrow,4,ok,borrow,True,2097152,90560,2094128,2094128,40,3719168,27246592,linux_proc_vmhwm_approximate,495149938,79564522,177631232,53735632,2048,2048,0,0,2048,0,1338,710,1391,0,419504678,5510109.537,8388608,10578039,933361.552539,0,495872,0

+mixed_tight,pressure,4,ok,pressure,True,2097152,90560,2097152,2097136,114,4243456,27246592,linux_proc_vmhwm_approximate,190688005,63157202,177631232,53735632,2048,2048,28385168,1727,321,1727,2371,1404,1387,0,130503094,6140018.745,8388608,9550771,347232.508173,0,523712,0

+mixed_tight,copy_no_pool,4,ok,copy,False,2097152,90560,2097136,2097136,115,4227072,27246592,linux_proc_vmhwm_approximate,195072389,63921931,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1348,0,134032681,6160078.753,9437184,9678087,352079.814928,0,0,0

+sparse_fast,borrow,0,ok,borrow,True,8388608,90560,156112,156112,1,1605632,27246592,linux_proc_vmhwm_approximate,28472110,28306962,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,13730.123,30720,65982,1788.400939,0,65552,0

+sparse_fast,copy_no_pool,0,ok,copy,False,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,28620499,28277537,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,13795.514,40960,86816,1561.617327,0,0,0

+sparse_fast,threshold4,0,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20774647,20729258,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9997.106,14336,72204,1105.947559,0,65632,0

+sparse_fast,threshold2,0,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20434497,20435000,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9831.374,13312,45186,1087.202091,0,65632,0

+sparse_fast,project,0,ok,project,True,8388608,90560,90640,90640,1,1540096,27246592,linux_proc_vmhwm_approximate,22218843,22096574,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10699.094,18432,59093,1.68791,0,80,0

+sparse_fast,threshold8,0,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20787962,20732148,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10004.317,14336,63834,1109.185459,0,65632,0

+sparse_fast,copy,0,ok,copy,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,21540986,21477686,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10352.839,18432,54334,1151.439237,0,65632,0

+sparse_fast,pressure,0,ok,pressure,True,8388608,90560,156112,156112,1,1589248,27246592,linux_proc_vmhwm_approximate,20305145,20305963,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9760.602,13312,58019,1256.330694,0,65552,0

+sparse_fast,borrow,1,ok,borrow,True,8388608,90560,156112,156112,1,1605632,27246592,linux_proc_vmhwm_approximate,20183773,20183889,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9700.917,13312,50334,1250.328097,0,65552,0

+sparse_fast,threshold4,1,ok,threshold,True,8388608,90560,156192,156192,1,1572864,27246592,linux_proc_vmhwm_approximate,20604128,20604259,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9906.217,13312,47686,1090.792499,0,65632,0

+sparse_fast,copy,1,ok,copy,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20493516,20493889,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9859.747,14336,52407,1088.217176,0,65632,0

+sparse_fast,project,1,ok,project,True,8388608,90560,90640,90640,1,1540096,27246592,linux_proc_vmhwm_approximate,21524893,21525074,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10363.91,13312,54889,1.632854,0,80,0

+sparse_fast,threshold8,1,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20381497,20382185,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9805.745,12288,47353,1087.257309,0,65632,0

+sparse_fast,pressure,1,ok,pressure,True,8388608,90560,156112,156112,1,1589248,27246592,linux_proc_vmhwm_approximate,20244385,20244778,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9731.208,13312,41426,1251.232387,0,65552,0

+sparse_fast,threshold2,1,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,22684901,22652390,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10925.772,22528,69779,1228.197157,0,65632,0

+sparse_fast,copy_no_pool,1,ok,copy,False,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,22993108,22893763,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,11062.46,18432,74149,1228.067562,0,0,0

+sparse_fast,threshold4,2,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20874129,20775314,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10044.57,16384,55556,1112.362141,0,65632,0

+sparse_fast,borrow,2,ok,borrow,True,8388608,90560,156112,156112,1,1572864,27246592,linux_proc_vmhwm_approximate,20176198,20176500,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9697.062,12288,39001,1246.966591,0,65552,0

+sparse_fast,copy,2,ok,copy,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20382034,20382277,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9806.967,12288,48779,1084.755978,0,65632,0

+sparse_fast,threshold8,2,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20453663,20454074,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9841.173,13312,53241,1090.324497,0,65632,0

+sparse_fast,copy_no_pool,2,ok,copy,False,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20636628,20636871,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,9920.915,13312,40464,1084.995845,0,0,0

+sparse_fast,pressure,2,ok,pressure,True,8388608,90560,156112,156112,1,1605632,27246592,linux_proc_vmhwm_approximate,20413515,20355722,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9812.253,14336,64112,1264.219091,0,65552,0

+sparse_fast,threshold2,2,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20421089,20421796,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9825.86,13312,53519,1088.001718,0,65632,0

+sparse_fast,project,2,ok,project,True,8388608,90560,90640,90640,1,1540096,27246592,linux_proc_vmhwm_approximate,21525764,21526111,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10364.601,13312,65686,1.632264,0,80,0

+sparse_fast,threshold2,3,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20829074,20798316,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10025.307,15360,65907,1111.338342,0,65632,0

+sparse_fast,pressure,3,ok,pressure,True,8388608,90560,156112,156112,1,1572864,27246592,linux_proc_vmhwm_approximate,20018290,20018407,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9620.129,12288,34982,1238.904613,0,65552,0

+sparse_fast,borrow,3,ok,borrow,True,8388608,90560,156112,156112,1,1589248,27246592,linux_proc_vmhwm_approximate,19968383,19952888,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9596.16,11264,52612,1236.323437,0,65552,0

+sparse_fast,threshold4,3,ok,threshold,True,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,21098686,21002369,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10153.021,16384,71204,1130.040808,0,65632,0

+sparse_fast,project,3,ok,project,True,8388608,90560,90640,90640,1,1540096,27246592,linux_proc_vmhwm_approximate,21459134,21459111,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10332.156,13312,41834,1.628379,0,80,0

+sparse_fast,threshold8,3,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,21122947,21019219,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10159.663,16384,63556,1125.541597,0,65632,0

+sparse_fast,copy,3,ok,copy,True,8388608,90560,156192,156192,1,1572864,27246592,linux_proc_vmhwm_approximate,20421330,20421426,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9825.919,13312,56575,1089.501083,0,65632,0

+sparse_fast,copy_no_pool,3,ok,copy,False,8388608,90560,156192,156192,1,1589248,27246592,linux_proc_vmhwm_approximate,20561183,20561592,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,9883.337,12288,45185,1085.229592,0,0,0

+sparse_fast,borrow,4,ok,borrow,True,8388608,90560,156112,156112,1,1589248,27246592,linux_proc_vmhwm_approximate,20082994,20072296,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9647.624,12288,51259,1243.235174,0,65552,0

+sparse_fast,pressure,4,ok,pressure,True,8388608,90560,156112,156112,1,1589248,27246592,linux_proc_vmhwm_approximate,23280610,23231480,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,11211.571,24576,54778,1448.645185,0,65552,0

+sparse_fast,threshold2,4,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,21989119,21857259,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10590.063,18432,79983,1185.989886,0,65632,0

+sparse_fast,copy_no_pool,4,ok,copy,False,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,21265947,21072353,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,10215.53,16384,91668,1125.003597,0,0,0

+sparse_fast,project,4,ok,project,True,8388608,90560,90640,90640,1,1507328,27246592,linux_proc_vmhwm_approximate,21358726,21358833,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10284.012,13312,47648,1.620534,0,80,0

+sparse_fast,threshold8,4,ok,threshold,True,8388608,90560,156192,156192,1,1572864,27246592,linux_proc_vmhwm_approximate,20441422,20426148,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9835.821,13312,50945,1089.704272,0,65632,0

+sparse_fast,copy,4,ok,copy,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20717721,20717834,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9969.584,13312,40148,1106.215747,0,65632,0

+sparse_fast,threshold4,4,ok,threshold,True,8388608,90560,156192,156192,1,1605632,27246592,linux_proc_vmhwm_approximate,20693813,20694148,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9958.775,13312,66019,1106.254829,0,65632,0

diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.json
new file mode 100644
index 0000000..6fc0da0
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/raw.json
@@ -0,0 +1,9122 @@
+[
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1687552,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160143537,
+    "cpu_ns": 26459012,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1524,
+    "sleep_ns": 137390253,
+    "latency_mean_ns": 34696998.27,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 41171715,
+    "active_byte_seconds": 6863.022101,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 157308101,
+    "cpu_ns": 31229598,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1480,
+    "sleep_ns": 130450222,
+    "latency_mean_ns": 33900498.29,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39440182,
+    "active_byte_seconds": 6941.796558,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155496866,
+    "cpu_ns": 24536501,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1532,
+    "sleep_ns": 134789830,
+    "latency_mean_ns": 33617642.818,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38582611,
+    "active_byte_seconds": 6573.377656,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155097886,
+    "cpu_ns": 24003453,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 135038766,
+    "latency_mean_ns": 33344720.225,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38228742,
+    "active_byte_seconds": 6474.089644,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154147870,
+    "cpu_ns": 24607892,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 133284576,
+    "latency_mean_ns": 33266783.578,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37610633,
+    "active_byte_seconds": 5450.353596,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 159785538,
+    "cpu_ns": 24425471,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 139188295,
+    "latency_mean_ns": 34401146.148,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40673920,
+    "active_byte_seconds": 6694.694537,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 107974911,
+    "cpu_ns": 48356230,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1100,
+    "slot_waits": 0,
+    "sleep_ns": 61689899,
+    "latency_mean_ns": 6299431.416,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9257676,
+    "active_byte_seconds": 842052.147088,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4318208,
+    "peak_queue": 512,
+    "rss_peak_bytes": 5832704,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 153730223,
+    "cpu_ns": 27269441,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113984,
+    "copied_records": 1781,
+    "borrowed_records": 267,
+    "pressure_copies": 1781,
+    "allocations": 514,
+    "reuses": 3315,
+    "budget_waits": 0,
+    "slot_waits": 1480,
+    "sleep_ns": 130232809,
+    "latency_mean_ns": 32945208.971,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38336797,
+    "active_byte_seconds": 525465.223488,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 106374934,
+    "cpu_ns": 48221069,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1095,
+    "slot_waits": 0,
+    "sleep_ns": 60129493,
+    "latency_mean_ns": 6201710.718,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9283991,
+    "active_byte_seconds": 829040.966005,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1687552,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160320037,
+    "cpu_ns": 25896167,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1525,
+    "sleep_ns": 138363559,
+    "latency_mean_ns": 34524425.147,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40334217,
+    "active_byte_seconds": 6779.619735,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160914091,
+    "cpu_ns": 25835642,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1519,
+    "sleep_ns": 138817024,
+    "latency_mean_ns": 34925615.31,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 42672599,
+    "active_byte_seconds": 6869.973543,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1687552,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154184073,
+    "cpu_ns": 23590708,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134309537,
+    "latency_mean_ns": 33299901.746,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37858502,
+    "active_byte_seconds": 6477.65682,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1687552,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154103999,
+    "cpu_ns": 23187579,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134573427,
+    "latency_mean_ns": 33283383.04,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37891279,
+    "active_byte_seconds": 6458.021349,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 157860470,
+    "cpu_ns": 28682548,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1516,
+    "sleep_ns": 133519836,
+    "latency_mean_ns": 34200243.611,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39812385,
+    "active_byte_seconds": 5603.286251,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4316848,
+    "peak_queue": 512,
+    "rss_peak_bytes": 5849088,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 157264009,
+    "cpu_ns": 27287611,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113408,
+    "copied_records": 1772,
+    "borrowed_records": 276,
+    "pressure_copies": 1772,
+    "allocations": 514,
+    "reuses": 3306,
+    "budget_waits": 0,
+    "slot_waits": 1470,
+    "sleep_ns": 133795355,
+    "latency_mean_ns": 32665634.037,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 42380378,
+    "active_byte_seconds": 542285.660244,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 656000,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 159054504,
+    "cpu_ns": 24707642,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 138332046,
+    "latency_mean_ns": 34466956.647,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 41828861,
+    "active_byte_seconds": 6705.336146,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155128904,
+    "cpu_ns": 25543272,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1516,
+    "sleep_ns": 133541383,
+    "latency_mean_ns": 33533790.057,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38416722,
+    "active_byte_seconds": 6610.674553,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154376239,
+    "cpu_ns": 24141589,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134070369,
+    "latency_mean_ns": 33348471.497,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37918872,
+    "active_byte_seconds": 6490.973039,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154320869,
+    "cpu_ns": 23690719,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134338369,
+    "latency_mean_ns": 33321815.102,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37742483,
+    "active_byte_seconds": 6490.329618,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4318768,
+    "peak_queue": 512,
+    "rss_peak_bytes": 5832704,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 151916969,
+    "cpu_ns": 26295422,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 114176,
+    "copied_records": 1784,
+    "borrowed_records": 264,
+    "pressure_copies": 1784,
+    "allocations": 514,
+    "reuses": 3318,
+    "budget_waits": 0,
+    "slot_waits": 1489,
+    "sleep_ns": 129297978,
+    "latency_mean_ns": 32537118.75,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37291707,
+    "active_byte_seconds": 513114.693547,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154140610,
+    "cpu_ns": 23189876,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134662671,
+    "latency_mean_ns": 33298003.958,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37866187,
+    "active_byte_seconds": 6456.771667,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154094443,
+    "cpu_ns": 24230112,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133556453,
+    "latency_mean_ns": 33259314.794,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37585114,
+    "active_byte_seconds": 5449.134094,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154652646,
+    "cpu_ns": 24092189,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 134423307,
+    "latency_mean_ns": 33402890.832,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37866335,
+    "active_byte_seconds": 6511.54798,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 129845439,
+    "cpu_ns": 45497318,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1501,
+    "slot_waits": 0,
+    "sleep_ns": 87228642,
+    "latency_mean_ns": 7656609.5,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9287806,
+    "active_byte_seconds": 1022546.229446,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154249202,
+    "cpu_ns": 24700764,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133261937,
+    "latency_mean_ns": 33273652.65,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37535317,
+    "active_byte_seconds": 5451.483102,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 137924379,
+    "cpu_ns": 44501920,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1704,
+    "slot_waits": 0,
+    "sleep_ns": 96547980,
+    "latency_mean_ns": 8155969.084,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9259085,
+    "active_byte_seconds": 1088953.248436,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4318128,
+    "peak_queue": 512,
+    "rss_peak_bytes": 5849088,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 152102968,
+    "cpu_ns": 26353180,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113984,
+    "copied_records": 1781,
+    "borrowed_records": 267,
+    "pressure_copies": 1781,
+    "allocations": 514,
+    "reuses": 3315,
+    "budget_waits": 0,
+    "slot_waits": 1489,
+    "sleep_ns": 129366758,
+    "latency_mean_ns": 32586897.428,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37391725,
+    "active_byte_seconds": 520107.889954,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154077370,
+    "cpu_ns": 23197132,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134591611,
+    "latency_mean_ns": 33277920.587,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37816187,
+    "active_byte_seconds": 6453.368258,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154022055,
+    "cpu_ns": 23087202,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134592710,
+    "latency_mean_ns": 33270464.792,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37834187,
+    "active_byte_seconds": 6450.425541,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 159640187,
+    "cpu_ns": 27408125,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1444,
+    "sleep_ns": 128856855,
+    "latency_mean_ns": 34666958.779,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 43466300,
+    "active_byte_seconds": 7402.36243,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155595440,
+    "cpu_ns": 25939365,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134098060,
+    "latency_mean_ns": 33573592.059,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 37962687,
+    "active_byte_seconds": 6570.059349,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 156340011,
+    "cpu_ns": 29539317,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1516,
+    "sleep_ns": 131960968,
+    "latency_mean_ns": 33615642.627,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38156538,
+    "active_byte_seconds": 6719.71558,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 162066143,
+    "cpu_ns": 36838768,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1413,
+    "sleep_ns": 131813978,
+    "latency_mean_ns": 34186582.359,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 44277743,
+    "active_byte_seconds": 7046.191505,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154776516,
+    "cpu_ns": 28160466,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1467,
+    "sleep_ns": 130788967,
+    "latency_mean_ns": 33183203.845,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39792181,
+    "active_byte_seconds": 6689.95279,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154788109,
+    "cpu_ns": 23986070,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134524839,
+    "latency_mean_ns": 33403921.35,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 37878020,
+    "active_byte_seconds": 6520.274636,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1720320,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154198518,
+    "cpu_ns": 23692568,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 134186642,
+    "latency_mean_ns": 33304172.097,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37802706,
+    "active_byte_seconds": 6492.439639,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 141446795,
+    "cpu_ns": 44722082,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1729,
+    "slot_waits": 0,
+    "sleep_ns": 99993943,
+    "latency_mean_ns": 8382742.796,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9272177,
+    "active_byte_seconds": 1119170.099864,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1703936,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154113537,
+    "cpu_ns": 24093342,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133716023,
+    "latency_mean_ns": 33269305.586,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37632576,
+    "active_byte_seconds": 6504.166448,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4318688,
+    "peak_queue": 512,
+    "rss_peak_bytes": 5849088,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154850386,
+    "cpu_ns": 27901892,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 114112,
+    "copied_records": 1783,
+    "borrowed_records": 265,
+    "pressure_copies": 1783,
+    "allocations": 514,
+    "reuses": 3317,
+    "budget_waits": 0,
+    "slot_waits": 1468,
+    "sleep_ns": 130766867,
+    "latency_mean_ns": 33232147.448,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39951922,
+    "active_byte_seconds": 524904.925261,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 157284342,
+    "cpu_ns": 26489150,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1510,
+    "sleep_ns": 134748166,
+    "latency_mean_ns": 33888730.885,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39144776,
+    "active_byte_seconds": 5552.251467,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 77760,
+    "peak_active_bytes": 77760,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167149794,
+    "cpu_ns": 26582076,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1974,
+    "sleep_ns": 144371389,
+    "latency_mean_ns": 5130099.306,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8958215,
+    "active_byte_seconds": 840.438441,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1622016,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167663571,
+    "cpu_ns": 26966696,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1961,
+    "sleep_ns": 144092606,
+    "latency_mean_ns": 5142490.023,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9061177,
+    "active_byte_seconds": 2058.951339,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 168181366,
+    "cpu_ns": 26871012,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1965,
+    "sleep_ns": 145357926,
+    "latency_mean_ns": 5163779.497,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8918178,
+    "active_byte_seconds": 2024.80935,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4267968,
+    "peak_active_bytes": 4267968,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5292032,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167216739,
+    "cpu_ns": 43926056,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1888,
+    "sleep_ns": 126773157,
+    "latency_mean_ns": 5126680.831,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 7718922,
+    "active_byte_seconds": 688195.924843,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4268048,
+    "peak_active_bytes": 4268048,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5767168,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167185425,
+    "cpu_ns": 45108627,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 2048,
+    "copied_records": 32,
+    "borrowed_records": 2016,
+    "pressure_copies": 32,
+    "allocations": 65,
+    "reuses": 2015,
+    "budget_waits": 0,
+    "slot_waits": 1714,
+    "sleep_ns": 125584463,
+    "latency_mean_ns": 5128742.545,
+    "latency_p99_upper_ns": 6291456,
+    "latency_max_ns": 6639537,
+    "active_byte_seconds": 677659.57207,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1622016,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 168358292,
+    "cpu_ns": 24933808,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 147266280,
+    "latency_mean_ns": 5168010.066,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9057715,
+    "active_byte_seconds": 1951.688735,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166820573,
+    "cpu_ns": 24630999,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 145973315,
+    "latency_mean_ns": 5129540.053,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9056604,
+    "active_byte_seconds": 1927.278894,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166777389,
+    "cpu_ns": 24643191,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1983,
+    "sleep_ns": 145938953,
+    "latency_mean_ns": 5126620.092,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9062437,
+    "active_byte_seconds": 1926.54795,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4268048,
+    "peak_active_bytes": 4268048,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5783552,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167023277,
+    "cpu_ns": 43214247,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 2048,
+    "copied_records": 32,
+    "borrowed_records": 2016,
+    "pressure_copies": 32,
+    "allocations": 65,
+    "reuses": 2015,
+    "budget_waits": 0,
+    "slot_waits": 1923,
+    "sleep_ns": 127480383,
+    "latency_mean_ns": 5125737.978,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 8171940,
+    "active_byte_seconds": 677260.281048,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167465182,
+    "cpu_ns": 25416979,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 146065308,
+    "latency_mean_ns": 5147482.869,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9043937,
+    "active_byte_seconds": 1953.686249,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 168266032,
+    "cpu_ns": 25648470,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 146554478,
+    "latency_mean_ns": 5170189.028,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8853271,
+    "active_byte_seconds": 1979.901257,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167352998,
+    "cpu_ns": 26167797,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 145161257,
+    "latency_mean_ns": 5140939.162,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9037974,
+    "active_byte_seconds": 1975.871965,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167352294,
+    "cpu_ns": 26149112,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 145164575,
+    "latency_mean_ns": 5140639.04,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9055067,
+    "active_byte_seconds": 1998.899707,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 77760,
+    "peak_active_bytes": 77760,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167537794,
+    "cpu_ns": 26582472,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1983,
+    "sleep_ns": 144932270,
+    "latency_mean_ns": 5144362.881,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9070492,
+    "active_byte_seconds": 842.776507,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177068451,
+    "cpu_ns": 34395657,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1964,
+    "sleep_ns": 148816905,
+    "latency_mean_ns": 5443811.067,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9497139,
+    "active_byte_seconds": 2287.854324,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4267968,
+    "peak_active_bytes": 4267968,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5292032,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 169327288,
+    "cpu_ns": 47272489,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1559,
+    "sleep_ns": 125366124,
+    "latency_mean_ns": 5174744.393,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 7999125,
+    "active_byte_seconds": 694635.953387,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166910296,
+    "cpu_ns": 25474992,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1982,
+    "sleep_ns": 145193155,
+    "latency_mean_ns": 5128818.551,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9004900,
+    "active_byte_seconds": 1987.487947,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167128888,
+    "cpu_ns": 26220522,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1980,
+    "sleep_ns": 144715144,
+    "latency_mean_ns": 5134877.701,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9062770,
+    "active_byte_seconds": 2002.587942,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167148609,
+    "cpu_ns": 25957735,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1977,
+    "sleep_ns": 145051954,
+    "latency_mean_ns": 5131955.022,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9073752,
+    "active_byte_seconds": 1998.277517,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 169611954,
+    "cpu_ns": 32276554,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1914,
+    "sleep_ns": 142094763,
+    "latency_mean_ns": 5206380.796,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8901622,
+    "active_byte_seconds": 2300.08379,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 77760,
+    "peak_active_bytes": 77760,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 171072487,
+    "cpu_ns": 27568676,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1973,
+    "sleep_ns": 147623196,
+    "latency_mean_ns": 5258257.061,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9512213,
+    "active_byte_seconds": 861.43609,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 169338770,
+    "cpu_ns": 27312589,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1973,
+    "sleep_ns": 146307420,
+    "latency_mean_ns": 5201400.59,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9016640,
+    "active_byte_seconds": 2055.277015,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4268048,
+    "peak_active_bytes": 4268048,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5767168,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 170783358,
+    "cpu_ns": 46177893,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 2048,
+    "copied_records": 32,
+    "borrowed_records": 2016,
+    "pressure_copies": 32,
+    "allocations": 65,
+    "reuses": 2015,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 127950932,
+    "latency_mean_ns": 5236882.494,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 7222257,
+    "active_byte_seconds": 691939.11555,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4267968,
+    "peak_active_bytes": 4267968,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5292032,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167156999,
+    "cpu_ns": 43876108,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1884,
+    "sleep_ns": 127058453,
+    "latency_mean_ns": 5126798.896,
+    "latency_p99_upper_ns": 6815744,
+    "latency_max_ns": 6645517,
+    "active_byte_seconds": 688213.378653,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166770166,
+    "cpu_ns": 25212214,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1984,
+    "sleep_ns": 145249611,
+    "latency_mean_ns": 5126749.497,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9015048,
+    "active_byte_seconds": 1964.863682,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167909533,
+    "cpu_ns": 27850375,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1956,
+    "sleep_ns": 144091763,
+    "latency_mean_ns": 5137672.764,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9072455,
+    "active_byte_seconds": 2094.171152,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 168528180,
+    "cpu_ns": 32536976,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1897,
+    "sleep_ns": 140338194,
+    "latency_mean_ns": 5169990.139,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8583716,
+    "active_byte_seconds": 2319.792062,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166715000,
+    "cpu_ns": 24659146,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1984,
+    "sleep_ns": 145786851,
+    "latency_mean_ns": 5125611.619,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9016234,
+    "active_byte_seconds": 1919.204343,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167074462,
+    "cpu_ns": 26663004,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1972,
+    "sleep_ns": 144308149,
+    "latency_mean_ns": 5134098.172,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9056067,
+    "active_byte_seconds": 2041.253864,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 77760,
+    "peak_active_bytes": 77760,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166784685,
+    "cpu_ns": 25542781,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1985,
+    "sleep_ns": 144995208,
+    "latency_mean_ns": 5128089.141,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9028215,
+    "active_byte_seconds": 840.114114,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4268048,
+    "peak_active_bytes": 4268048,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5750784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167121239,
+    "cpu_ns": 44137216,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 2048,
+    "copied_records": 32,
+    "borrowed_records": 2016,
+    "pressure_copies": 32,
+    "allocations": 65,
+    "reuses": 2015,
+    "budget_waits": 0,
+    "slot_waits": 1831,
+    "sleep_ns": 126710351,
+    "latency_mean_ns": 5127462.262,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 7853292,
+    "active_byte_seconds": 677483.645644,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4267968,
+    "peak_active_bytes": 4267968,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5292032,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167212479,
+    "cpu_ns": 44714000,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1813,
+    "sleep_ns": 126101064,
+    "latency_mean_ns": 5127098.881,
+    "latency_p99_upper_ns": 6291456,
+    "latency_max_ns": 6795851,
+    "active_byte_seconds": 688253.763142,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1622016,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166717963,
+    "cpu_ns": 24687036,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1983,
+    "sleep_ns": 145714382,
+    "latency_mean_ns": 5125971.683,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8962826,
+    "active_byte_seconds": 1940.992711,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166680851,
+    "cpu_ns": 24341624,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1985,
+    "sleep_ns": 146024444,
+    "latency_mean_ns": 5125321.995,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9060326,
+    "active_byte_seconds": 1923.416256,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1654784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166829203,
+    "cpu_ns": 24368638,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1984,
+    "sleep_ns": 146127572,
+    "latency_mean_ns": 5127589.86,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9064418,
+    "active_byte_seconds": 1922.285206,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 77760,
+    "peak_active_bytes": 77760,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167505794,
+    "cpu_ns": 25505816,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1985,
+    "sleep_ns": 145758292,
+    "latency_mean_ns": 5149157.839,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9024826,
+    "active_byte_seconds": 843.565622,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167165609,
+    "cpu_ns": 25932182,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1976,
+    "sleep_ns": 145075045,
+    "latency_mean_ns": 5133720.043,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9029714,
+    "active_byte_seconds": 1986.249813,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4267968,
+    "peak_active_bytes": 4267968,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5292032,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167597886,
+    "cpu_ns": 45634483,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 64,
+    "reuses": 1984,
+    "budget_waits": 0,
+    "slot_waits": 1768,
+    "sleep_ns": 125625299,
+    "latency_mean_ns": 5136396.266,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 8047606,
+    "active_byte_seconds": 689499.931113,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 143312,
+    "peak_active_bytes": 143312,
+    "peak_queue": 64,
+    "rss_peak_bytes": 1638400,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166724425,
+    "cpu_ns": 24304145,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 65,
+    "reuses": 4031,
+    "budget_waits": 0,
+    "slot_waits": 1984,
+    "sleep_ns": 146112652,
+    "latency_mean_ns": 5125215.218,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8987715,
+    "active_byte_seconds": 1915.595622,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 72640,
+    "peak_reserved_bytes": 4268048,
+    "peak_active_bytes": 4268048,
+    "peak_queue": 64,
+    "rss_peak_bytes": 5750784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 167102943,
+    "cpu_ns": 43204463,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 2048,
+    "copied_records": 32,
+    "borrowed_records": 2016,
+    "pressure_copies": 32,
+    "allocations": 65,
+    "reuses": 2015,
+    "budget_waits": 0,
+    "slot_waits": 1902,
+    "sleep_ns": 127501222,
+    "latency_mean_ns": 5127130.23,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 7758552,
+    "active_byte_seconds": 677439.045656,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181746660,
+    "cpu_ns": 79318230,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 106431291,
+    "latency_mean_ns": 10743611.753,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12983832,
+    "active_byte_seconds": 1442582.012105,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 161215386,
+    "cpu_ns": 89862451,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1244,
+    "slot_waits": 0,
+    "sleep_ns": 73999062,
+    "latency_mean_ns": 9530310.653,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11475412,
+    "active_byte_seconds": 1273441.862727,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181545716,
+    "cpu_ns": 79933333,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1794,
+    "slot_waits": 0,
+    "sleep_ns": 105524896,
+    "latency_mean_ns": 10805826.457,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13598424,
+    "active_byte_seconds": 1442046.73663,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 179808887,
+    "cpu_ns": 82476393,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1739,
+    "slot_waits": 0,
+    "sleep_ns": 101034766,
+    "latency_mean_ns": 10695483.804,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13755645,
+    "active_byte_seconds": 1427516.577261,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181070273,
+    "cpu_ns": 83392187,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 101645153,
+    "latency_mean_ns": 10688072.436,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13270480,
+    "active_byte_seconds": 1435135.645514,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 182712953,
+    "cpu_ns": 81359541,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1784,
+    "slot_waits": 0,
+    "sleep_ns": 105215055,
+    "latency_mean_ns": 10867028.691,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13321591,
+    "active_byte_seconds": 1450265.685197,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 187716865,
+    "cpu_ns": 74974355,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1885,
+    "slot_waits": 0,
+    "sleep_ns": 116741671,
+    "latency_mean_ns": 11188037.068,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13610887,
+    "active_byte_seconds": 1492582.952313,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177819652,
+    "cpu_ns": 80765616,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1732,
+    "slot_waits": 0,
+    "sleep_ns": 100790270,
+    "latency_mean_ns": 10569593.51,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12515889,
+    "active_byte_seconds": 1410709.704111,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 183713376,
+    "cpu_ns": 79010560,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 108825186,
+    "latency_mean_ns": 10852089.214,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12891240,
+    "active_byte_seconds": 1457141.599471,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181690178,
+    "cpu_ns": 80219667,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1787,
+    "slot_waits": 0,
+    "sleep_ns": 105238489,
+    "latency_mean_ns": 10811191.05,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13211998,
+    "active_byte_seconds": 1442791.441175,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 187516958,
+    "cpu_ns": 75386397,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1881,
+    "slot_waits": 0,
+    "sleep_ns": 116242907,
+    "latency_mean_ns": 11180449.479,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13778256,
+    "active_byte_seconds": 1491587.457419,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181604364,
+    "cpu_ns": 78951924,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1764,
+    "slot_waits": 0,
+    "sleep_ns": 106543831,
+    "latency_mean_ns": 10804561.506,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13821367,
+    "active_byte_seconds": 1441898.713593,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 162629252,
+    "cpu_ns": 88543490,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1913,
+    "slot_waits": 0,
+    "sleep_ns": 77289755,
+    "latency_mean_ns": 9526763.21,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13455924,
+    "active_byte_seconds": 1279274.820821,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177629041,
+    "cpu_ns": 82100973,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1640,
+    "slot_waits": 0,
+    "sleep_ns": 98770708,
+    "latency_mean_ns": 10557136.903,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13384591,
+    "active_byte_seconds": 1409274.391678,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 176146657,
+    "cpu_ns": 82398748,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1605,
+    "slot_waits": 0,
+    "sleep_ns": 97290225,
+    "latency_mean_ns": 10456864.841,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12598464,
+    "active_byte_seconds": 1395956.019109,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177871837,
+    "cpu_ns": 82048383,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1692,
+    "slot_waits": 0,
+    "sleep_ns": 99804043,
+    "latency_mean_ns": 10550904.139,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13302146,
+    "active_byte_seconds": 1408308.914356,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 178298984,
+    "cpu_ns": 83177513,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1922,
+    "slot_waits": 0,
+    "sleep_ns": 99077474,
+    "latency_mean_ns": 10508907.261,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13207943,
+    "active_byte_seconds": 1411086.299499,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181467845,
+    "cpu_ns": 82821089,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1672,
+    "slot_waits": 0,
+    "sleep_ns": 102626015,
+    "latency_mean_ns": 10774249.202,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12846870,
+    "active_byte_seconds": 1438045.689091,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 133633132,
+    "cpu_ns": 106591389,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 396,
+    "slot_waits": 0,
+    "sleep_ns": 28102711,
+    "latency_mean_ns": 7778565.752,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12128873,
+    "active_byte_seconds": 1042347.024547,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177934893,
+    "cpu_ns": 82638851,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1719,
+    "slot_waits": 0,
+    "sleep_ns": 98938213,
+    "latency_mean_ns": 10577573.546,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12061188,
+    "active_byte_seconds": 1411845.015325,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 180208516,
+    "cpu_ns": 83532190,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1755,
+    "slot_waits": 0,
+    "sleep_ns": 100354141,
+    "latency_mean_ns": 10704952.958,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11578059,
+    "active_byte_seconds": 1428781.613196,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 185672333,
+    "cpu_ns": 80542923,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 109123678,
+    "latency_mean_ns": 10977524.849,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13368332,
+    "active_byte_seconds": 1473966.510893,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 184526170,
+    "cpu_ns": 78362511,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1834,
+    "slot_waits": 0,
+    "sleep_ns": 110126299,
+    "latency_mean_ns": 10988073.928,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13728757,
+    "active_byte_seconds": 1466214.025114,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 186194683,
+    "cpu_ns": 78514601,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1865,
+    "slot_waits": 0,
+    "sleep_ns": 111800399,
+    "latency_mean_ns": 11071491.94,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13571164,
+    "active_byte_seconds": 1477291.36261,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 181552086,
+    "cpu_ns": 80699818,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1690,
+    "slot_waits": 0,
+    "sleep_ns": 104861831,
+    "latency_mean_ns": 10716792.58,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12527594,
+    "active_byte_seconds": 1430323.101776,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 176007991,
+    "cpu_ns": 84507344,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1626,
+    "slot_waits": 0,
+    "sleep_ns": 94771244,
+    "latency_mean_ns": 10450519.416,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13672942,
+    "active_byte_seconds": 1395156.109095,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 152737854,
+    "cpu_ns": 99861953,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 890,
+    "slot_waits": 0,
+    "sleep_ns": 54158702,
+    "latency_mean_ns": 8983717.571,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12746037,
+    "active_byte_seconds": 1201774.933886,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 184530299,
+    "cpu_ns": 78669541,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 109915619,
+    "latency_mean_ns": 10914646.174,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13287517,
+    "active_byte_seconds": 1465541.553301,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 133391651,
+    "cpu_ns": 112766017,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1523,
+    "slot_waits": 0,
+    "sleep_ns": 20003852,
+    "latency_mean_ns": 7733517.169,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11792151,
+    "active_byte_seconds": 1038602.867364,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 166473036,
+    "cpu_ns": 87150086,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1399,
+    "slot_waits": 0,
+    "sleep_ns": 82606050,
+    "latency_mean_ns": 9857584.602,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13713590,
+    "active_byte_seconds": 1316650.677161,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154311406,
+    "cpu_ns": 92958406,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1082,
+    "slot_waits": 0,
+    "sleep_ns": 62034758,
+    "latency_mean_ns": 9096496.741,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11453763,
+    "active_byte_seconds": 1216142.805053,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 172422001,
+    "cpu_ns": 86572890,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1520,
+    "slot_waits": 0,
+    "sleep_ns": 89162361,
+    "latency_mean_ns": 10222342.367,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13171721,
+    "active_byte_seconds": 1365000.503032,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 182776175,
+    "cpu_ns": 83801034,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 102610607,
+    "latency_mean_ns": 10792342.655,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13409628,
+    "active_byte_seconds": 1449128.406768,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 172321224,
+    "cpu_ns": 93701381,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1317,
+    "slot_waits": 0,
+    "sleep_ns": 81313113,
+    "latency_mean_ns": 10121009.211,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13629442,
+    "active_byte_seconds": 1352204.310615,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 161726717,
+    "cpu_ns": 90653564,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1291,
+    "slot_waits": 0,
+    "sleep_ns": 73742733,
+    "latency_mean_ns": 9543033.955,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13496479,
+    "active_byte_seconds": 1275079.33543,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 168343995,
+    "cpu_ns": 87047828,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1917,
+    "slot_waits": 0,
+    "sleep_ns": 84775336,
+    "latency_mean_ns": 9903397.208,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13360535,
+    "active_byte_seconds": 1329804.191236,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9469952,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 150178547,
+    "cpu_ns": 91472405,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1089,
+    "slot_waits": 0,
+    "sleep_ns": 61163642,
+    "latency_mean_ns": 8764951.531,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12700278,
+    "active_byte_seconds": 1171761.488413,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160544406,
+    "cpu_ns": 90636057,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1220,
+    "slot_waits": 0,
+    "sleep_ns": 72541038,
+    "latency_mean_ns": 9456018.519,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 12662167,
+    "active_byte_seconds": 1263635.432461,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 177206635,
+    "cpu_ns": 83537344,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1659,
+    "slot_waits": 0,
+    "sleep_ns": 97328864,
+    "latency_mean_ns": 10529385.897,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12256668,
+    "active_byte_seconds": 1405563.035864,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 9486336,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 169205769,
+    "cpu_ns": 93894859,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1358,
+    "slot_waits": 0,
+    "sleep_ns": 77830920,
+    "latency_mean_ns": 9905630.789,
+    "latency_p99_upper_ns": 14680064,
+    "latency_max_ns": 15320344,
+    "active_byte_seconds": 1323477.613603,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388448,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 157820358,
+    "cpu_ns": 72816171,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2118,
+    "reuses": 1629,
+    "budget_waits": 983,
+    "slot_waits": 0,
+    "sleep_ns": 87435519,
+    "latency_mean_ns": 20627967.734,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27848623,
+    "active_byte_seconds": 1145134.388634,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 359,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 152663243,
+    "cpu_ns": 58871841,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1712,
+    "reuses": 336,
+    "budget_waits": 1020,
+    "slot_waits": 0,
+    "sleep_ns": 96564951,
+    "latency_mean_ns": 20645944.552,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 28536362,
+    "active_byte_seconds": 1105768.632536,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 218,
+    "rss_peak_bytes": 10928128,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154865144,
+    "cpu_ns": 68111825,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1854,
+    "reuses": 1202,
+    "budget_waits": 1088,
+    "slot_waits": 0,
+    "sleep_ns": 89372126,
+    "latency_mean_ns": 12505668.119,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 16314249,
+    "active_byte_seconds": 1173514.267706,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388544,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 147730720,
+    "cpu_ns": 59461567,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1091,
+    "slot_waits": 0,
+    "sleep_ns": 90844456,
+    "latency_mean_ns": 19373026.656,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27720475,
+    "active_byte_seconds": 1058083.377077,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 284,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154278831,
+    "cpu_ns": 65116485,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1939,
+    "reuses": 1466,
+    "budget_waits": 1101,
+    "slot_waits": 0,
+    "sleep_ns": 91754428,
+    "latency_mean_ns": 15979998.057,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 21200642,
+    "active_byte_seconds": 1146944.244493,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 148231627,
+    "cpu_ns": 61867221,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2282,
+    "reuses": 1814,
+    "budget_waits": 1066,
+    "slot_waits": 0,
+    "sleep_ns": 88853774,
+    "latency_mean_ns": 19421431.677,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27565124,
+    "active_byte_seconds": 1061176.084143,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 151434543,
+    "cpu_ns": 63073539,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2181,
+    "reuses": 1607,
+    "budget_waits": 1055,
+    "slot_waits": 0,
+    "sleep_ns": 90878850,
+    "latency_mean_ns": 19880247.948,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27687586,
+    "active_byte_seconds": 1085460.729712,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386688,
+    "peak_queue": 112,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155306143,
+    "cpu_ns": 76020257,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1309,
+    "reuses": 739,
+    "budget_waits": 1057,
+    "slot_waits": 0,
+    "sleep_ns": 81695551,
+    "latency_mean_ns": 6922951.601,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 8980622,
+    "active_byte_seconds": 1223077.166921,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 350,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160379239,
+    "cpu_ns": 76853903,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2142,
+    "reuses": 1954,
+    "budget_waits": 945,
+    "slot_waits": 0,
+    "sleep_ns": 86445280,
+    "latency_mean_ns": 20559126.612,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 31399761,
+    "active_byte_seconds": 1126649.918907,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154875385,
+    "cpu_ns": 62824900,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2184,
+    "reuses": 1604,
+    "budget_waits": 1064,
+    "slot_waits": 0,
+    "sleep_ns": 94824069,
+    "latency_mean_ns": 20387628.756,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 28330122,
+    "active_byte_seconds": 1114766.522227,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386688,
+    "peak_queue": 112,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160560980,
+    "cpu_ns": 82185381,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1298,
+    "reuses": 750,
+    "budget_waits": 1014,
+    "slot_waits": 0,
+    "sleep_ns": 81045212,
+    "latency_mean_ns": 7165375.219,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9128899,
+    "active_byte_seconds": 1265871.620641,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 218,
+    "rss_peak_bytes": 10895360,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 158376930,
+    "cpu_ns": 70010099,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1840,
+    "reuses": 1216,
+    "budget_waits": 1069,
+    "slot_waits": 0,
+    "sleep_ns": 91117649,
+    "latency_mean_ns": 12818618.589,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 16509452,
+    "active_byte_seconds": 1202455.090015,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 284,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 158364004,
+    "cpu_ns": 67436217,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1915,
+    "reuses": 1490,
+    "budget_waits": 1082,
+    "slot_waits": 0,
+    "sleep_ns": 93660619,
+    "latency_mean_ns": 16427087.508,
+    "latency_p99_upper_ns": 23068672,
+    "latency_max_ns": 21701826,
+    "active_byte_seconds": 1180098.881536,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 150598212,
+    "cpu_ns": 62794080,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2194,
+    "reuses": 1553,
+    "budget_waits": 1045,
+    "slot_waits": 0,
+    "sleep_ns": 90472858,
+    "latency_mean_ns": 19666383.09,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27539921,
+    "active_byte_seconds": 1091553.931133,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 147750665,
+    "cpu_ns": 60136047,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1079,
+    "slot_waits": 0,
+    "sleep_ns": 90065234,
+    "latency_mean_ns": 19383039.199,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27513476,
+    "active_byte_seconds": 1059302.637881,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 359,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 161035903,
+    "cpu_ns": 71350453,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1684,
+    "reuses": 364,
+    "budget_waits": 940,
+    "slot_waits": 0,
+    "sleep_ns": 92840414,
+    "latency_mean_ns": 21900800.478,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 29845877,
+    "active_byte_seconds": 1171929.531923,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 344,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 156784527,
+    "cpu_ns": 75333533,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 936,
+    "slot_waits": 0,
+    "sleep_ns": 83839404,
+    "latency_mean_ns": 20060454.119,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27533828,
+    "active_byte_seconds": 1101855.462406,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 359,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155323458,
+    "cpu_ns": 61447221,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1698,
+    "reuses": 350,
+    "budget_waits": 1001,
+    "slot_waits": 0,
+    "sleep_ns": 96575508,
+    "latency_mean_ns": 21013565.399,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 28307510,
+    "active_byte_seconds": 1125180.461018,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 148908587,
+    "cpu_ns": 62691660,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2295,
+    "reuses": 1801,
+    "budget_waits": 1060,
+    "slot_waits": 0,
+    "sleep_ns": 88867276,
+    "latency_mean_ns": 19542842.845,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27366569,
+    "active_byte_seconds": 1068483.42084,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 218,
+    "rss_peak_bytes": 10895360,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 155250569,
+    "cpu_ns": 68193969,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1856,
+    "reuses": 1200,
+    "budget_waits": 1091,
+    "slot_waits": 0,
+    "sleep_ns": 89649032,
+    "latency_mean_ns": 12540132.329,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 16196379,
+    "active_byte_seconds": 1176609.476886,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 284,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 153993443,
+    "cpu_ns": 64368954,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1951,
+    "reuses": 1454,
+    "budget_waits": 1113,
+    "slot_waits": 0,
+    "sleep_ns": 92271541,
+    "latency_mean_ns": 15971202.74,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20927051,
+    "active_byte_seconds": 1146423.83916,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386688,
+    "peak_queue": 112,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 156530676,
+    "cpu_ns": 80398481,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1289,
+    "reuses": 759,
+    "budget_waits": 1012,
+    "slot_waits": 0,
+    "sleep_ns": 78480840,
+    "latency_mean_ns": 6972909.934,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9059956,
+    "active_byte_seconds": 1232378.631527,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11010048,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 150924192,
+    "cpu_ns": 62137633,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2185,
+    "reuses": 1603,
+    "budget_waits": 1066,
+    "slot_waits": 0,
+    "sleep_ns": 91396144,
+    "latency_mean_ns": 19908205.041,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27188866,
+    "active_byte_seconds": 1087150.034862,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 151817449,
+    "cpu_ns": 63923421,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2188,
+    "reuses": 1559,
+    "budget_waits": 1043,
+    "slot_waits": 0,
+    "sleep_ns": 90636475,
+    "latency_mean_ns": 19811286.8,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27547513,
+    "active_byte_seconds": 1100686.98981,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 150346490,
+    "cpu_ns": 61910200,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2191,
+    "reuses": 1556,
+    "budget_waits": 1052,
+    "slot_waits": 0,
+    "sleep_ns": 90957629,
+    "latency_mean_ns": 19620014.043,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27598753,
+    "active_byte_seconds": 1088594.710179,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386736,
+    "peak_queue": 112,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154664385,
+    "cpu_ns": 75260445,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1309,
+    "reuses": 739,
+    "budget_waits": 1060,
+    "slot_waits": 0,
+    "sleep_ns": 81727723,
+    "latency_mean_ns": 6891592.543,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9042474,
+    "active_byte_seconds": 1217311.080951,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388448,
+    "peak_active_bytes": 8388448,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 149074586,
+    "cpu_ns": 62457772,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1070,
+    "slot_waits": 0,
+    "sleep_ns": 89108781,
+    "latency_mean_ns": 19570212.309,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27735827,
+    "active_byte_seconds": 1068598.834234,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388448,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11010048,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 151416673,
+    "cpu_ns": 62409227,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2196,
+    "reuses": 1592,
+    "budget_waits": 1072,
+    "slot_waits": 0,
+    "sleep_ns": 91608903,
+    "latency_mean_ns": 19945957.829,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27499217,
+    "active_byte_seconds": 1089269.648492,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 218,
+    "rss_peak_bytes": 10928128,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154832681,
+    "cpu_ns": 68708379,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1844,
+    "reuses": 1212,
+    "budget_waits": 1080,
+    "slot_waits": 0,
+    "sleep_ns": 88746131,
+    "latency_mean_ns": 12500210.727,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 16133805,
+    "active_byte_seconds": 1173410.180784,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 284,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 153954221,
+    "cpu_ns": 64939588,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1938,
+    "reuses": 1467,
+    "budget_waits": 1106,
+    "slot_waits": 0,
+    "sleep_ns": 91640646,
+    "latency_mean_ns": 15956645.429,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20876513,
+    "active_byte_seconds": 1145843.306835,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 348,
+    "rss_peak_bytes": 11026432,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154316312,
+    "cpu_ns": 71405240,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2185,
+    "reuses": 1911,
+    "budget_waits": 984,
+    "slot_waits": 0,
+    "sleep_ns": 85159635,
+    "latency_mean_ns": 20042799.471,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27766253,
+    "active_byte_seconds": 1098260.452799,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 359,
+    "rss_peak_bytes": 11567104,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 153157278,
+    "cpu_ns": 59550541,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1715,
+    "reuses": 333,
+    "budget_waits": 1025,
+    "slot_waits": 0,
+    "sleep_ns": 96249111,
+    "latency_mean_ns": 20737608.082,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 28456288,
+    "active_byte_seconds": 1110823.213775,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11583488,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 148559421,
+    "cpu_ns": 60872675,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2291,
+    "reuses": 1805,
+    "budget_waits": 1082,
+    "slot_waits": 0,
+    "sleep_ns": 90209021,
+    "latency_mean_ns": 19484771.246,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27464198,
+    "active_byte_seconds": 1064901.546602,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11042816,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 152463225,
+    "cpu_ns": 62941260,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2190,
+    "reuses": 1598,
+    "budget_waits": 1076,
+    "slot_waits": 0,
+    "sleep_ns": 92180791,
+    "latency_mean_ns": 20063222.989,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27720123,
+    "active_byte_seconds": 1096182.913762,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 359,
+    "rss_peak_bytes": 11567104,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 156226158,
+    "cpu_ns": 60922941,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1712,
+    "reuses": 336,
+    "budget_waits": 1009,
+    "slot_waits": 0,
+    "sleep_ns": 98129027,
+    "latency_mean_ns": 21028903.054,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 30198524,
+    "active_byte_seconds": 1124769.099854,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 218,
+    "rss_peak_bytes": 10534912,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 159080169,
+    "cpu_ns": 72479922,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1823,
+    "reuses": 1233,
+    "budget_waits": 1052,
+    "slot_waits": 0,
+    "sleep_ns": 89038311,
+    "latency_mean_ns": 12767575.616,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 17017117,
+    "active_byte_seconds": 1198559.835478,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386688,
+    "peak_queue": 112,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 160859182,
+    "cpu_ns": 83693169,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1286,
+    "reuses": 762,
+    "budget_waits": 998,
+    "slot_waits": 0,
+    "sleep_ns": 79719697,
+    "latency_mean_ns": 7168367.113,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9348362,
+    "active_byte_seconds": 1265838.726396,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 350,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 153665517,
+    "cpu_ns": 63556619,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1061,
+    "slot_waits": 0,
+    "sleep_ns": 92811834,
+    "latency_mean_ns": 20225367.343,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 27663216,
+    "active_byte_seconds": 1106709.142867,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 284,
+    "rss_peak_bytes": 11059200,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 154918866,
+    "cpu_ns": 67062426,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1917,
+    "reuses": 1488,
+    "budget_waits": 1084,
+    "slot_waits": 0,
+    "sleep_ns": 90513202,
+    "latency_mean_ns": 16065937.041,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20956347,
+    "active_byte_seconds": 1153471.713074,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 11026432,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 150607823,
+    "cpu_ns": 62564984,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2185,
+    "reuses": 1562,
+    "budget_waits": 1048,
+    "slot_waits": 0,
+    "sleep_ns": 90639036,
+    "latency_mean_ns": 19672453.154,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 27555809,
+    "active_byte_seconds": 1091824.795529,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 113,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 190186189,
+    "cpu_ns": 62042049,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2373,
+    "reuses": 1402,
+    "budget_waits": 1378,
+    "slot_waits": 0,
+    "sleep_ns": 130967488,
+    "latency_mean_ns": 6127305.056,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9614324,
+    "active_byte_seconds": 346183.559002,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 175306603,
+    "cpu_ns": 59313331,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1720,
+    "reuses": 328,
+    "budget_waits": 1300,
+    "slot_waits": 0,
+    "sleep_ns": 118791611,
+    "latency_mean_ns": 6273925.584,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8853437,
+    "active_byte_seconds": 326279.178906,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 225451606,
+    "cpu_ns": 64792167,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2134,
+    "reuses": 1271,
+    "budget_waits": 1457,
+    "slot_waits": 0,
+    "sleep_ns": 163697658,
+    "latency_mean_ns": 5851904.688,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10247748,
+    "active_byte_seconds": 413690.587373,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 191774166,
+    "cpu_ns": 62795054,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2467,
+    "reuses": 1629,
+    "budget_waits": 1361,
+    "slot_waits": 0,
+    "sleep_ns": 131825729,
+    "latency_mean_ns": 6045168.869,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8688826,
+    "active_byte_seconds": 346452.547175,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 107,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 195726691,
+    "cpu_ns": 69455356,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1284,
+    "slot_waits": 0,
+    "sleep_ns": 128917157,
+    "latency_mean_ns": 6157981.172,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9013123,
+    "active_byte_seconds": 353204.287515,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 73,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 284917692,
+    "cpu_ns": 71405280,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1986,
+    "reuses": 1070,
+    "budget_waits": 1377,
+    "slot_waits": 0,
+    "sleep_ns": 216762211,
+    "latency_mean_ns": 5735627.926,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9131844,
+    "active_byte_seconds": 525336.273255,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 3702784,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 493631884,
+    "cpu_ns": 81275705,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1338,
+    "reuses": 710,
+    "budget_waits": 1381,
+    "slot_waits": 0,
+    "sleep_ns": 416164894,
+    "latency_mean_ns": 5487868.994,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 10310562,
+    "active_byte_seconds": 930117.776585,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 188818619,
+    "cpu_ns": 63133028,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2370,
+    "reuses": 1418,
+    "budget_waits": 1385,
+    "slot_waits": 0,
+    "sleep_ns": 128526332,
+    "latency_mean_ns": 6127166.122,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8910974,
+    "active_byte_seconds": 342945.952067,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 179280258,
+    "cpu_ns": 63072197,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1706,
+    "reuses": 342,
+    "budget_waits": 1292,
+    "slot_waits": 0,
+    "sleep_ns": 119263134,
+    "latency_mean_ns": 6405571.191,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9266621,
+    "active_byte_seconds": 333023.673744,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 72,
+    "rss_peak_bytes": 4358144,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 289852215,
+    "cpu_ns": 73110582,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1968,
+    "reuses": 1088,
+    "budget_waits": 1366,
+    "slot_waits": 0,
+    "sleep_ns": 216619289,
+    "latency_mean_ns": 5811531.61,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 14653198,
+    "active_byte_seconds": 533913.89253,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 192676756,
+    "cpu_ns": 64089681,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1353,
+    "slot_waits": 0,
+    "sleep_ns": 131367991,
+    "latency_mean_ns": 6074626.45,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9595565,
+    "active_byte_seconds": 347823.24917,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4456448,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 190841576,
+    "cpu_ns": 65297407,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2364,
+    "reuses": 1411,
+    "budget_waits": 1367,
+    "slot_waits": 0,
+    "sleep_ns": 128364836,
+    "latency_mean_ns": 6138653.731,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9614713,
+    "active_byte_seconds": 347120.008423,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 114,
+    "rss_peak_bytes": 4407296,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 191186483,
+    "cpu_ns": 62157319,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2461,
+    "reuses": 1635,
+    "budget_waits": 1369,
+    "slot_waits": 0,
+    "sleep_ns": 131673734,
+    "latency_mean_ns": 6044094.394,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8856067,
+    "active_byte_seconds": 346056.920887,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 189607302,
+    "cpu_ns": 65204064,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2354,
+    "reuses": 1434,
+    "budget_waits": 1374,
+    "slot_waits": 0,
+    "sleep_ns": 127228274,
+    "latency_mean_ns": 6129531.969,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8917400,
+    "active_byte_seconds": 344084.726971,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 225029662,
+    "cpu_ns": 63936677,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2132,
+    "reuses": 1273,
+    "budget_waits": 1459,
+    "slot_waits": 0,
+    "sleep_ns": 164083415,
+    "latency_mean_ns": 5845044.948,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10255656,
+    "active_byte_seconds": 413025.125756,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 3719168,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 493081274,
+    "cpu_ns": 77876795,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1342,
+    "reuses": 706,
+    "budget_waits": 1396,
+    "slot_waits": 0,
+    "sleep_ns": 417981885,
+    "latency_mean_ns": 5480641.02,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9914990,
+    "active_byte_seconds": 929020.44715,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 491778453,
+    "cpu_ns": 73168533,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1352,
+    "reuses": 696,
+    "budget_waits": 1408,
+    "slot_waits": 0,
+    "sleep_ns": 421825716,
+    "latency_mean_ns": 5473786.015,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9925323,
+    "active_byte_seconds": 926994.460577,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 114,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 188770790,
+    "cpu_ns": 62771264,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2380,
+    "reuses": 1408,
+    "budget_waits": 1395,
+    "slot_waits": 0,
+    "sleep_ns": 128898177,
+    "latency_mean_ns": 6126984.319,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8906435,
+    "active_byte_seconds": 343018.464235,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 189986910,
+    "cpu_ns": 58086718,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1383,
+    "slot_waits": 0,
+    "sleep_ns": 134499200,
+    "latency_mean_ns": 6008153.507,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8893917,
+    "active_byte_seconds": 343741.458999,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 174670169,
+    "cpu_ns": 55539698,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1727,
+    "reuses": 321,
+    "budget_waits": 1312,
+    "slot_waits": 0,
+    "sleep_ns": 121848710,
+    "latency_mean_ns": 6258533.417,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8834323,
+    "active_byte_seconds": 325246.46456,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 193714972,
+    "cpu_ns": 64286995,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2353,
+    "reuses": 1422,
+    "budget_waits": 1371,
+    "slot_waits": 0,
+    "sleep_ns": 132496502,
+    "latency_mean_ns": 6233962.195,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 11493286,
+    "active_byte_seconds": 352390.15124,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 191684197,
+    "cpu_ns": 62544845,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2479,
+    "reuses": 1617,
+    "budget_waits": 1373,
+    "slot_waits": 0,
+    "sleep_ns": 131979930,
+    "latency_mean_ns": 6064467.489,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8905416,
+    "active_byte_seconds": 346663.433689,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 229047558,
+    "cpu_ns": 67894565,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2094,
+    "reuses": 1311,
+    "budget_waits": 1425,
+    "slot_waits": 0,
+    "sleep_ns": 164358967,
+    "latency_mean_ns": 5921381.751,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10252296,
+    "active_byte_seconds": 418976.246455,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 72,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 283681970,
+    "cpu_ns": 69888728,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1987,
+    "reuses": 1069,
+    "budget_waits": 1378,
+    "slot_waits": 0,
+    "sleep_ns": 217008850,
+    "latency_mean_ns": 5688342.625,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 9247808,
+    "active_byte_seconds": 522809.985389,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 102,
+    "rss_peak_bytes": 4325376,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 201965490,
+    "cpu_ns": 80116546,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2291,
+    "reuses": 1497,
+    "budget_waits": 1275,
+    "slot_waits": 0,
+    "sleep_ns": 123310392,
+    "latency_mean_ns": 6483685.515,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 11156636,
+    "active_byte_seconds": 364031.028759,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 493440,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 3719168,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 494160071,
+    "cpu_ns": 76904068,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1346,
+    "reuses": 702,
+    "budget_waits": 1397,
+    "slot_waits": 0,
+    "sleep_ns": 420872435,
+    "latency_mean_ns": 5490372.664,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9952646,
+    "active_byte_seconds": 930733.63783,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 191245856,
+    "cpu_ns": 61096231,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2481,
+    "reuses": 1615,
+    "budget_waits": 1387,
+    "slot_waits": 0,
+    "sleep_ns": 132860200,
+    "latency_mean_ns": 6056702.267,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8733304,
+    "active_byte_seconds": 346194.049558,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 4407296,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 174872810,
+    "cpu_ns": 56429902,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1726,
+    "reuses": 322,
+    "budget_waits": 1310,
+    "slot_waits": 0,
+    "sleep_ns": 121198578,
+    "latency_mean_ns": 6260365.932,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8926676,
+    "active_byte_seconds": 325635.507331,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 224725167,
+    "cpu_ns": 63560757,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2132,
+    "reuses": 1273,
+    "budget_waits": 1456,
+    "slot_waits": 0,
+    "sleep_ns": 164191839,
+    "latency_mean_ns": 5841515.207,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10276240,
+    "active_byte_seconds": 412794.10328,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 73,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 283036048,
+    "cpu_ns": 73067755,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1972,
+    "reuses": 1084,
+    "budget_waits": 1379,
+    "slot_waits": 0,
+    "sleep_ns": 213650376,
+    "latency_mean_ns": 5678436.735,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 9220899,
+    "active_byte_seconds": 521434.266403,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 113,
+    "rss_peak_bytes": 4456448,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 189790379,
+    "cpu_ns": 60625611,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2369,
+    "reuses": 1406,
+    "budget_waits": 1393,
+    "slot_waits": 0,
+    "sleep_ns": 131820061,
+    "latency_mean_ns": 6110038.652,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9522938,
+    "active_byte_seconds": 345327.900203,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 192179115,
+    "cpu_ns": 71826579,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1293,
+    "slot_waits": 0,
+    "sleep_ns": 123142369,
+    "latency_mean_ns": 6044858.508,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8899841,
+    "active_byte_seconds": 346584.591442,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 175527737,
+    "cpu_ns": 57919540,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1728,
+    "reuses": 320,
+    "budget_waits": 1310,
+    "slot_waits": 0,
+    "sleep_ns": 120470904,
+    "latency_mean_ns": 6282412.787,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 8759229,
+    "active_byte_seconds": 326547.492623,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 113,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 188314755,
+    "cpu_ns": 61699247,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2377,
+    "reuses": 1411,
+    "budget_waits": 1394,
+    "slot_waits": 0,
+    "sleep_ns": 129399417,
+    "latency_mean_ns": 6110229.914,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8949046,
+    "active_byte_seconds": 342240.604823,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 72,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 282255055,
+    "cpu_ns": 67344177,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1990,
+    "reuses": 1066,
+    "budget_waits": 1394,
+    "slot_waits": 0,
+    "sleep_ns": 217945110,
+    "latency_mean_ns": 5670280.355,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 9286807,
+    "active_byte_seconds": 520513.491017,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 191037345,
+    "cpu_ns": 60906478,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2491,
+    "reuses": 1605,
+    "budget_waits": 1378,
+    "slot_waits": 0,
+    "sleep_ns": 132768233,
+    "latency_mean_ns": 6050681.287,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8878730,
+    "active_byte_seconds": 345866.556263,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 226976916,
+    "cpu_ns": 67053797,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2113,
+    "reuses": 1292,
+    "budget_waits": 1429,
+    "slot_waits": 0,
+    "sleep_ns": 163248630,
+    "latency_mean_ns": 5888077.344,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 10246777,
+    "active_byte_seconds": 416261.40193,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 3719168,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 495149938,
+    "cpu_ns": 79564522,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1338,
+    "reuses": 710,
+    "budget_waits": 1391,
+    "slot_waits": 0,
+    "sleep_ns": 419504678,
+    "latency_mean_ns": 5510109.537,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 10578039,
+    "active_byte_seconds": 933361.552539,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 114,
+    "rss_peak_bytes": 4243456,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 190688005,
+    "cpu_ns": 63157202,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2371,
+    "reuses": 1404,
+    "budget_waits": 1387,
+    "slot_waits": 0,
+    "sleep_ns": 130503094,
+    "latency_mean_ns": 6140018.745,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9550771,
+    "active_byte_seconds": 347232.508173,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 4227072,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 195072389,
+    "cpu_ns": 63921931,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1348,
+    "slot_waits": 0,
+    "sleep_ns": 134032681,
+    "latency_mean_ns": 6160078.753,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9678087,
+    "active_byte_seconds": 352079.814928,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 28472110,
+    "cpu_ns": 28306962,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 13730.123,
+    "latency_p99_upper_ns": 30720,
+    "latency_max_ns": 65982,
+    "active_byte_seconds": 1788.400939,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 28620499,
+    "cpu_ns": 28277537,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 13795.514,
+    "latency_p99_upper_ns": 40960,
+    "latency_max_ns": 86816,
+    "active_byte_seconds": 1561.617327,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20774647,
+    "cpu_ns": 20729258,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9997.106,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 72204,
+    "active_byte_seconds": 1105.947559,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20434497,
+    "cpu_ns": 20435000,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9831.374,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 45186,
+    "active_byte_seconds": 1087.202091,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1540096,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 22218843,
+    "cpu_ns": 22096574,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10699.094,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 59093,
+    "active_byte_seconds": 1.68791,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20787962,
+    "cpu_ns": 20732148,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10004.317,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 63834,
+    "active_byte_seconds": 1109.185459,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21540986,
+    "cpu_ns": 21477686,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10352.839,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 54334,
+    "active_byte_seconds": 1151.439237,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20305145,
+    "cpu_ns": 20305963,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9760.602,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 58019,
+    "active_byte_seconds": 1256.330694,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20183773,
+    "cpu_ns": 20183889,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9700.917,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 50334,
+    "active_byte_seconds": 1250.328097,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20604128,
+    "cpu_ns": 20604259,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9906.217,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 47686,
+    "active_byte_seconds": 1090.792499,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20493516,
+    "cpu_ns": 20493889,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9859.747,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 52407,
+    "active_byte_seconds": 1088.217176,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1540096,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21524893,
+    "cpu_ns": 21525074,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10363.91,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 54889,
+    "active_byte_seconds": 1.632854,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20381497,
+    "cpu_ns": 20382185,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9805.745,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 47353,
+    "active_byte_seconds": 1087.257309,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20244385,
+    "cpu_ns": 20244778,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9731.208,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 41426,
+    "active_byte_seconds": 1251.232387,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 22684901,
+    "cpu_ns": 22652390,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10925.772,
+    "latency_p99_upper_ns": 22528,
+    "latency_max_ns": 69779,
+    "active_byte_seconds": 1228.197157,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 22993108,
+    "cpu_ns": 22893763,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 11062.46,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 74149,
+    "active_byte_seconds": 1228.067562,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20874129,
+    "cpu_ns": 20775314,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10044.57,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 55556,
+    "active_byte_seconds": 1112.362141,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20176198,
+    "cpu_ns": 20176500,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9697.062,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 39001,
+    "active_byte_seconds": 1246.966591,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20382034,
+    "cpu_ns": 20382277,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9806.967,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 48779,
+    "active_byte_seconds": 1084.755978,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20453663,
+    "cpu_ns": 20454074,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9841.173,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 53241,
+    "active_byte_seconds": 1090.324497,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20636628,
+    "cpu_ns": 20636871,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9920.915,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 40464,
+    "active_byte_seconds": 1084.995845,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20413515,
+    "cpu_ns": 20355722,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9812.253,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 64112,
+    "active_byte_seconds": 1264.219091,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20421089,
+    "cpu_ns": 20421796,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9825.86,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 53519,
+    "active_byte_seconds": 1088.001718,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1540096,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21525764,
+    "cpu_ns": 21526111,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10364.601,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 65686,
+    "active_byte_seconds": 1.632264,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20829074,
+    "cpu_ns": 20798316,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10025.307,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 65907,
+    "active_byte_seconds": 1111.338342,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20018290,
+    "cpu_ns": 20018407,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9620.129,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 34982,
+    "active_byte_seconds": 1238.904613,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 19968383,
+    "cpu_ns": 19952888,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9596.16,
+    "latency_p99_upper_ns": 11264,
+    "latency_max_ns": 52612,
+    "active_byte_seconds": 1236.323437,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21098686,
+    "cpu_ns": 21002369,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10153.021,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 71204,
+    "active_byte_seconds": 1130.040808,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1540096,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21459134,
+    "cpu_ns": 21459111,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10332.156,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 41834,
+    "active_byte_seconds": 1.628379,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21122947,
+    "cpu_ns": 21019219,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10159.663,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 63556,
+    "active_byte_seconds": 1125.541597,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20421330,
+    "cpu_ns": 20421426,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9825.919,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 56575,
+    "active_byte_seconds": 1089.501083,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20561183,
+    "cpu_ns": 20561592,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9883.337,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 45185,
+    "active_byte_seconds": 1085.229592,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20082994,
+    "cpu_ns": 20072296,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9647.624,
+    "latency_p99_upper_ns": 12288,
+    "latency_max_ns": 51259,
+    "active_byte_seconds": 1243.235174,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1589248,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 23280610,
+    "cpu_ns": 23231480,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 11211.571,
+    "latency_p99_upper_ns": 24576,
+    "latency_max_ns": 54778,
+    "active_byte_seconds": 1448.645185,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21989119,
+    "cpu_ns": 21857259,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10590.063,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 79983,
+    "active_byte_seconds": 1185.989886,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21265947,
+    "cpu_ns": 21072353,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10215.53,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 91668,
+    "active_byte_seconds": 1125.003597,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1507328,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 21358726,
+    "cpu_ns": 21358833,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10284.012,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 47648,
+    "active_byte_seconds": 1.620534,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1572864,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20441422,
+    "cpu_ns": 20426148,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9835.821,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 50945,
+    "active_byte_seconds": 1089.704272,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20717721,
+    "cpu_ns": 20717834,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9969.584,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 40148,
+    "active_byte_seconds": 1106.215747,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 1605632,
+    "rusage_maxrss_bytes": 27246592,
+    "rss_peak_source": "linux_proc_vmhwm_approximate",
+    "elapsed_ns": 20693813,
+    "cpu_ns": 20694148,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9958.775,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 66019,
+    "active_byte_seconds": 1106.254829,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/benchmark.c b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/benchmark.c
new file mode 100644
index 0000000..c9e8120
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/benchmark.c
@@ -0,0 +1,338 @@
+#define _POSIX_C_SOURCE 200809L
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <time.h>
+#include <unistd.h>
+
+/* A measurement apparatus, not the Pure runtime or a general document parser. */
+enum { CACHE_SLOTS = 16, SCRATCH = 65536, HIST_SIZE = 512, MAX_FRAME = 8*1024*1024 };
+typedef struct Block { size_t capacity; uint64_t since; unsigned char bytes[]; } Block;
+typedef struct Item {
+    Block *block;
+    size_t offset, length;
+    uint64_t start, ready;
+} Item;
+typedef struct Engine {
+    Item *queue;
+    Block *cache[CACHE_SLOTS];
+    unsigned char scratch[SCRATCH];
+    uint64_t histogram[HIST_SIZE];
+    size_t slots, head, count, fixed, budget, reserved, active, cached;
+    size_t peak_reserved, peak_active, peak_queue;
+    uint64_t allocations, reuses, copies, read_bytes, written_bytes;
+    uint64_t accepted, emitted, copied_records, borrowed_records, pressure_copies;
+    uint64_t budget_waits, slot_waits, sleep_ns, hold_ns, service_ns, last_emit;
+    uint64_t elapsed_ns, cpu_ns, latency_sum, latency_max, start, cancel_after;
+    long double active_byte_ns;
+    unsigned ratio;
+    bool pool;
+    const char *policy, *status;
+} Engine;
+static volatile sig_atomic_t interrupted;
+static void stop(int sig) { (void)sig; interrupted = 1; }
+static uint64_t ns(clockid_t clock) {
+    struct timespec t;
+    if (clock_gettime(clock, &t)) { perror("clock_gettime"); exit(2); }
+    return (uint64_t)t.tv_sec * UINT64_C(1000000000) + (uint64_t)t.tv_nsec;
+}
+static size_t charge(const Block *b) { return sizeof(*b) + b->capacity; }
+static size_t rounded(size_t n) {
+    size_t r = 64;
+    while (r < n) r *= 2;
+    return r;
+}
+static void peaks(Engine *e) {
+    assert(e->active + e->cached == e->reserved);
+    assert(e->fixed + e->reserved <= e->budget);
+    if (e->reserved > e->peak_reserved) e->peak_reserved = e->reserved;
+    if (e->active > e->peak_active) e->peak_active = e->active;
+}
+static void evict(Engine *e, size_t i) {
+    Block *b = e->cache[i];
+    if (!b) return;
+    e->cached -= charge(b); e->reserved -= charge(b);
+    free(b); e->cache[i] = NULL;
+}
+static Block *take(Engine *e, size_t n) {
+    size_t capacity = rounded(n), need = sizeof(Block) + capacity;
+    if (e->pool) {
+        for (size_t i = 0; i < CACHE_SLOTS; ++i) {
+            Block *b = e->cache[i];
+            if (b && b->capacity == capacity) {
+                e->cache[i] = NULL; e->cached -= need; e->active += need;
+                ++e->reuses; b->since = ns(CLOCK_MONOTONIC); peaks(e); return b;
+            }
+        }
+    }
+    for (size_t i = 0; i < CACHE_SLOTS && need > e->budget-e->fixed-e->reserved; ++i)
+        evict(e, i);
+    if (need > e->budget-e->fixed-e->reserved) return NULL;
+    Block *b = malloc(need);
+    if (!b) { e->status = "allocation_failed"; return NULL; }
+    b->capacity = capacity; b->since = ns(CLOCK_MONOTONIC);
+    e->reserved += need; e->active += need; ++e->allocations; peaks(e); return b;
+}
+static void give(Engine *e, Block *b) {
+    if (!b) return;
+    size_t bytes = charge(b);
+    e->active_byte_ns += (long double)bytes * (ns(CLOCK_MONOTONIC)-b->since);
+    e->active -= bytes;
+    if (e->pool && bytes <= e->budget/4-e->cached) {
+        for (size_t i = 0; i < CACHE_SLOTS; ++i) if (!e->cache[i]) {
+            e->cache[i] = b; e->cached += bytes; peaks(e); return;
+        }
+    }
+    e->reserved -= bytes; free(b); peaks(e);
+}
+static bool sleep_until(Engine *e, uint64_t deadline) {
+    uint64_t t = ns(CLOCK_MONOTONIC), start = t;
+    while (t < deadline && !interrupted) {
+        uint64_t delta = deadline-t;
+        struct timespec request = {(time_t)(delta/1000000000), (long)(delta%1000000000)};
+        if (nanosleep(&request, NULL) && errno != EINTR) { e->status="sleep_failed"; return false; }
+        t = ns(CLOCK_MONOTONIC);
+    }
+    e->sleep_ns += t-start;
+    return !interrupted;
+}
+/* floor(log2(ns)) with eight subdivisions: upper bound error <= 12.5%. */
+static unsigned bucket(uint64_t n) {
+    unsigned exponent = 0;
+    for (uint64_t x = n; x > 1; x >>= 1) ++exponent;
+    if (exponent < 3) return (unsigned)n;
+    return exponent*8 + (unsigned)((n-(UINT64_C(1)<<exponent))>>(exponent-3));
+}
+static uint64_t upper(unsigned b) {
+    if (b < 24) return b+1;
+    unsigned exponent = b/8;
+    if (exponent >= 63) return UINT64_MAX;
+    return (UINT64_C(1)<<exponent) + (uint64_t)(b%8+1)*(UINT64_C(1)<<(exponent-3));
+}
+static bool write_all(Engine *e, const void *src, size_t n) {
+    const unsigned char *p = src;
+    while (n && !interrupted) {
+        ssize_t written = write(STDOUT_FILENO, p, n);
+        if (written < 0 && errno == EINTR) continue;
+        if (written <= 0) { e->status = "output_failed"; return false; }
+        p += written; n -= (size_t)written; e->written_bytes += (uint64_t)written;
+    }
+    return !interrupted;
+}
+static bool emit(Engine *e) {
+    assert(e->count);
+    Item *item = &e->queue[e->head];
+    uint64_t ready = item->ready;
+    if (e->last_emit + e->service_ns > ready) ready = e->last_emit + e->service_ns;
+    if (!sleep_until(e, ready)) return false;
+    uint32_t len = (uint32_t)item->length;
+    unsigned char header[4] = {(unsigned char)len, (unsigned char)(len>>8),
+                              (unsigned char)(len>>16), (unsigned char)(len>>24)};
+    if (!write_all(e, header, sizeof header) ||
+        !write_all(e, item->block->bytes+item->offset, item->length)) return false;
+    uint64_t now = ns(CLOCK_MONOTONIC), latency = now-item->start;
+    ++e->histogram[bucket(latency)]; e->latency_sum += latency;
+    if (latency > e->latency_max) e->latency_max = latency;
+    e->last_emit = now; ++e->emitted;
+    give(e, item->block); item->block = NULL;
+    e->head = (e->head+1)%e->slots; --e->count;
+    if (e->cancel_after && e->emitted >= e->cancel_after) {
+        e->status = "cancelled"; return false;
+    }
+    return true;
+}
+static Block *acquire(Engine *e, size_t n) {
+    for (;;) {
+        Block *b = take(e, n);
+        if (b) return b;
+        if (strcmp(e->status, "ok")) return NULL;
+        if (!e->count) { e->status = "budget_too_small"; return NULL; }
+        ++e->budget_waits;
+        if (!emit(e)) return NULL;
+    }
+}
+/* Returns 1 on complete read, 0 on clean EOF before any byte, -1 on failure. */
+static int read_exact(Engine *e, void *dst, size_t n) {
+    unsigned char *p = dst; size_t done = 0;
+    while (done < n && !interrupted) {
+        ssize_t got = read(STDIN_FILENO, p+done, n-done);
+        if (got < 0 && errno == EINTR) continue;
+        if (got < 0) { e->status="input_failed"; return -1; }
+        if (!got) { if (!done) return 0; e->status="truncated_input"; return -1; }
+        done += (size_t)got; e->read_bytes += (uint64_t)got;
+    }
+    return interrupted ? -1 : 1;
+}
+static bool discard(Engine *e, size_t n) {
+    while (n) {
+        size_t chunk = n < SCRATCH ? n : SCRATCH;
+        if (read_exact(e, e->scratch, chunk) != 1) {
+            if (!strcmp(e->status,"ok")) e->status="truncated_input";
+            return false;
+        }
+        n -= chunk;
+    }
+    return true;
+}
+static uint32_t le32(const unsigned char *p) {
+    return (uint32_t)p[0] | (uint32_t)p[1]<<8 | (uint32_t)p[2]<<16 | (uint32_t)p[3]<<24;
+}
+/* Linux's rusage high-water mark survives exec. Read the current mm's HWM
+ * separately; proc RSS accounting is approximate, not allocator accounting. */
+static uint64_t image_peak_rss(void) {
+#if defined(__linux__)
+    FILE *status = fopen("/proc/self/status", "r");
+    if (!status) return 0;
+    char line[256]; unsigned long long kib = 0;
+    while (fgets(line, sizeof line, status))
+        if (sscanf(line, "VmHWM: %llu kB", &kib) == 1) break;
+    fclose(status);
+    return (uint64_t)kib * 1024;
+#else
+    return 0; /* No current-image peak implemented for other OSes. */
+#endif
+}
+static void run(Engine *e) {
+    for (;;) {
+        if (interrupted) break;
+        if (e->count) {
+            Item *head = &e->queue[e->head];
+            uint64_t now = ns(CLOCK_MONOTONIC);
+            if (now >= head->ready && now >= e->last_emit+e->service_ns) {
+                if (!emit(e)) break;
+                continue;
+            }
+        }
+        if (e->count == e->slots) { ++e->slot_waits; if (!emit(e)) break; }
+        unsigned char header[12];
+        uint64_t start = ns(CLOCK_MONOTONIC);
+        int got = read_exact(e, header, sizeof header);
+        if (got != 1) {
+            if (!got) while (e->count && !interrupted) if (!emit(e)) break;
+            break;
+        }
+        size_t payload = le32(header), offset = le32(header+4), length = le32(header+8);
+        if (!payload || payload > MAX_FRAME || !length || offset > payload || length > payload-offset) {
+            e->status="invalid_frame"; break;
+        }
+        bool project = !strcmp(e->policy,"project");
+        Block *source = acquire(e, project ? length : payload);
+        if (!source) break;
+        bool valid;
+        if (project) {
+            valid = discard(e, offset) && read_exact(e, source->bytes, length)==1 &&
+                    discard(e, payload-offset-length);
+            offset = 0;
+        } else valid = read_exact(e, source->bytes, payload)==1;
+        if (!valid) {
+            if (!strcmp(e->status,"ok")) e->status="truncated_input";
+            give(e, source); break;
+        }
+        bool copy = !strcmp(e->policy,"copy") ||
+            (!strcmp(e->policy,"threshold") && rounded(payload)/rounded(length) >= e->ratio);
+        if (!strcmp(e->policy,"pressure")) {
+            /* Online rule using current charged live buffers; no future lifetime. */
+            copy = rounded(length) < source->capacity &&
+                   e->active > (e->budget-e->fixed)/2;
+            if (copy) ++e->pressure_copies;
+        }
+        if (!project && copy) {
+            Block *small = acquire(e, length);
+            if (!small) { give(e, source); break; }
+            memcpy(small->bytes, source->bytes+offset, length);
+            e->copies += length; ++e->copied_records;
+            give(e, source); source = small; offset = 0;
+        } else if (!project) ++e->borrowed_records;
+        size_t tail = (e->head+e->count)%e->slots;
+        e->queue[tail] = (Item){source, offset, length, start, ns(CLOCK_MONOTONIC)+e->hold_ns};
+        ++e->count; ++e->accepted;
+        if (e->count > e->peak_queue) e->peak_queue=e->count;
+    }
+    if (interrupted) e->status="cancelled";
+}
+static uint64_t number(const char *s, uint64_t maximum) {
+    char *end; errno=0;
+    unsigned long long n = strtoull(s, &end, 10);
+    if (!*s || *s=='-' || *end || errno || n>maximum) { fprintf(stderr,"invalid number\n"); exit(2); }
+    return n;
+}
+int main(int argc, char **argv) {
+    Engine *e = calloc(1, sizeof *e);
+    if (!e) return 2;
+    e->policy="borrow"; e->status="ok"; e->budget=8*1024*1024; e->slots=512;
+    e->ratio=4; e->pool=true;
+    for (int i=1; i<argc; i+=2) {
+        if (i+1==argc) { fprintf(stderr,"options require values\n"); free(e); return 2; }
+        const char *key=argv[i], *value=argv[i+1];
+        if (!strcmp(key,"--policy")) e->policy=value;
+        else if (!strcmp(key,"--budget")) e->budget=(size_t)number(value,1073741824);
+        else if (!strcmp(key,"--slots")) e->slots=(size_t)number(value,4096);
+        else if (!strcmp(key,"--hold-us")) e->hold_ns=number(value,10000000)*1000;
+        else if (!strcmp(key,"--service-us")) e->service_ns=number(value,10000000)*1000;
+        else if (!strcmp(key,"--ratio")) e->ratio=(unsigned)number(value,UINT_MAX);
+        else if (!strcmp(key,"--pool")) e->pool=number(value,1)!=0;
+        else if (!strcmp(key,"--cancel-after")) e->cancel_after=number(value,UINT64_MAX);
+        else { fprintf(stderr,"unknown option\n"); free(e); return 2; }
+    }
+    bool known = !strcmp(e->policy,"borrow") || !strcmp(e->policy,"copy") ||
+        !strcmp(e->policy,"threshold") || !strcmp(e->policy,"pressure") || !strcmp(e->policy,"project");
+    if (!known || !e->slots || e->slots>4096 || e->ratio<2 || e->budget>UINT64_C(1073741824) ||
+        e->hold_ns>UINT64_C(10000000000) || e->service_ns>UINT64_C(10000000000)) {
+        fprintf(stderr,"invalid configuration\n"); free(e); return 2;
+    }
+    e->fixed=sizeof(*e)+e->slots*sizeof(Item);
+    if (e->budget < e->fixed) { fprintf(stderr,"budget below fixed metadata\n"); free(e); return 2; }
+    e->queue=calloc(e->slots,sizeof(Item));
+    if (!e->queue) { free(e); return 2; }
+    signal(SIGINT,stop); signal(SIGTERM,stop); signal(SIGPIPE,SIG_IGN);
+    e->start=ns(CLOCK_MONOTONIC); uint64_t cpu=ns(CLOCK_PROCESS_CPUTIME_ID);
+    run(e);
+    size_t live_at_stop=e->active, cached_at_stop=e->cached;
+    while (e->count) {
+        give(e,e->queue[e->head].block); e->head=(e->head+1)%e->slots; --e->count;
+    }
+    for (size_t i=0;i<CACHE_SLOTS;++i) evict(e,i);
+    assert(!e->active && !e->reserved && !e->cached);
+    e->elapsed_ns=ns(CLOCK_MONOTONIC)-e->start; e->cpu_ns=ns(CLOCK_PROCESS_CPUTIME_ID)-cpu;
+    uint64_t target=e->emitted-e->emitted/100, sum=0, p99=0;
+    for (unsigned b=0; e->emitted && b<HIST_SIZE; ++b) {
+        sum+=e->histogram[b]; if (sum>=target) { p99=upper(b); break; }
+    }
+    struct rusage usage; long rss=0;
+    if (!getrusage(RUSAGE_SELF,&usage)) rss=usage.ru_maxrss;
+#if defined(__APPLE__)
+    uint64_t rusage_bytes=(uint64_t)rss;
+#else
+    uint64_t rusage_bytes=(uint64_t)rss*1024;
+#endif
+    uint64_t rss_bytes=image_peak_rss();
+    fprintf(stderr,"{\"status\":\"%s\",\"policy\":\"%s\",\"pool\":%s,"
+        "\"budget_bytes\":%zu,\"fixed_bytes\":%zu,\"peak_reserved_bytes\":%zu,"
+        "\"peak_active_bytes\":%zu,\"peak_queue\":%zu,\"rss_peak_bytes\":%" PRIu64 ","
+        "\"rusage_maxrss_bytes\":%" PRIu64 ",\"rss_peak_source\":\"%s\","
+        "\"elapsed_ns\":%" PRIu64 ",\"cpu_ns\":%" PRIu64 ",\"input_bytes\":%" PRIu64 ","
+        "\"output_bytes\":%" PRIu64 ",\"accepted\":%" PRIu64 ",\"emitted\":%" PRIu64 ","
+        "\"copy_bytes\":%" PRIu64 ",\"copied_records\":%" PRIu64 ",\"borrowed_records\":%" PRIu64 ","
+        "\"pressure_copies\":%" PRIu64 ",\"allocations\":%" PRIu64 ",\"reuses\":%" PRIu64 ","
+        "\"budget_waits\":%" PRIu64 ",\"slot_waits\":%" PRIu64 ",\"sleep_ns\":%" PRIu64 ","
+        "\"latency_mean_ns\":%.3f,\"latency_p99_upper_ns\":%" PRIu64 ",\"latency_max_ns\":%" PRIu64 ","
+        "\"active_byte_seconds\":%.6Lf,\"live_at_stop_bytes\":%zu,\"cached_at_stop_bytes\":%zu,"
+        "\"unreleased_buffer_bytes\":%zu}\n",
+        e->status,e->policy,e->pool?"true":"false",e->budget,e->fixed,e->fixed+e->peak_reserved,
+        e->fixed+e->peak_active,e->peak_queue,rss_bytes,rusage_bytes,
+        rss_bytes?"linux_proc_vmhwm_approximate":"unavailable",e->elapsed_ns,e->cpu_ns,e->read_bytes,
+        e->written_bytes,e->accepted,e->emitted,e->copies,e->copied_records,e->borrowed_records,
+        e->pressure_copies,e->allocations,e->reuses,e->budget_waits,e->slot_waits,e->sleep_ns,
+        e->emitted?(double)e->latency_sum/(double)e->emitted:0,p99,e->latency_max,
+        e->active_byte_ns/1e9L,live_at_stop,cached_at_stop,e->reserved);
+    int result=!strcmp(e->status,"ok")?0:!strcmp(e->status,"cancelled")?3:2;
+    free(e->queue); free(e); return result;
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/plan.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/plan.json
new file mode 100644
index 0000000..1737f45
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/plan.json
@@ -0,0 +1,35 @@
+{
+  "version": 2,
+  "written_before_measurement": true,
+  "revision_note": "The v1 run is preserved. Before this v2 run, RSS instrumentation was corrected and a 64-slot sparse sensitivity case was added after observing different queue occupancy. This is an exploratory follow-up, not a pre-registered confirmation.",
+  "seed": 20260922,
+  "repeats": 5,
+  "slots": 512,
+  "policies": [
+    {"name": "borrow", "policy": "borrow", "pool": 1},
+    {"name": "copy", "policy": "copy", "pool": 1},
+    {"name": "threshold2", "policy": "threshold", "ratio": 2, "pool": 1},
+    {"name": "threshold4", "policy": "threshold", "ratio": 4, "pool": 1},
+    {"name": "threshold8", "policy": "threshold", "ratio": 8, "pool": 1},
+    {"name": "pressure", "policy": "pressure", "pool": 1},
+    {"name": "project", "policy": "project", "pool": 1},
+    {"name": "copy_no_pool", "policy": "copy", "pool": 0}
+  ],
+  "cases": [
+    {"name": "sparse_slow", "shape": "sparse", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "sparse_slots64", "shape": "sparse", "records": 2048, "budget": 8388608, "slots": 64, "hold_us": 5000, "service_us": 20},
+    {"name": "dense_slow", "shape": "dense", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "mixed_slow", "shape": "mixed", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "mixed_tight", "shape": "mixed", "records": 2048, "budget": 2097152, "hold_us": 5000, "service_us": 20},
+    {"name": "sparse_fast", "shape": "sparse", "records": 2048, "budget": 8388608, "hold_us": 0, "service_us": 0}
+  ],
+  "expectations": [
+    "Borrow retains full source allocations for small selections.",
+    "Copy can add CPU and transient source plus destination memory for dense selections.",
+    "A current-pressure rule need not outperform a static size rule or early projection.",
+    "Pool reuse can reduce allocation calls while increasing reserved idle memory.",
+    "No Pure-specific advantage, application SLO, or statistical significance is presumed."
+  ],
+  "comparison_rule": "Report all presets and repetitions; no post-hoc winner is called an out-of-sample tuned policy.",
+  "limits": "Single FIFO local pipeline with synthetic delayed sink. No Sonic/Node/.NET benchmark, fan-out, persistent cache, generic JSON parser, external open-loop arrivals, or production SLO."
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/run.py b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/run.py
new file mode 100644
index 0000000..49a693c
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/sources/run.py
@@ -0,0 +1,300 @@
+#!/usr/bin/env python3
+"""Build, independently verify, and measure the retention experiment."""
+import argparse
+import csv
+import hashlib
+import json
+import os
+from pathlib import Path
+import platform
+import random
+import shlex
+import signal
+import statistics
+import struct
+import subprocess
+import tempfile
+import time
+
+ROOT = Path(__file__).resolve().parent
+FLAGS = ["-std=c17", "-Wall", "-Wextra", "-Wpedantic", "-Werror", "-O2", "-g"]
+
+
+def digest(path):
+    with open(path, "rb") as stream:
+        return hashlib.file_digest(stream, "sha256").hexdigest()
+
+
+def dump(path, value):
+    path.write_text(json.dumps(value, indent=2, ensure_ascii=False) + "\n")
+
+
+def build(cc, output, sanitizer=False):
+    command = [*cc, *FLAGS]
+    if sanitizer:
+        command += ["-fsanitize=address,undefined", "-fno-omit-frame-pointer"]
+    command += [str(ROOT / "benchmark.c"), "-o", str(output)]
+    result = subprocess.run(command, capture_output=True, text=True, check=True)
+    return {"command": command, "stderr": result.stderr, "sha256": digest(output),
+            "size_bytes": output.stat().st_size}
+
+
+def shape_for(shape, rng, i):
+    if shape == "sparse":
+        return 65536, 64
+    if shape == "dense":
+        return 65536, 49152
+    if shape == "mixed":
+        source = rng.choice([4096, 16384, 65536, 262144])
+        keep = max(16, source // rng.choice([1, 2, 4, 8, 64, 1024]))
+        return source, keep
+    if shape == "test":
+        return [(1, 1), (63, 17), (4097, 12), (65536, 49152), (127, 127)][i % 5]
+    raise ValueError(shape)
+
+
+def fixture(path, shape, count, seed):
+    rng = random.Random(seed)
+    expected = hashlib.sha256()
+    total = 0
+    with path.open("wb") as stream:
+        for i in range(count):
+            size, keep = shape_for(shape, rng, i)
+            offset = rng.randrange(size - keep + 1)
+            # All input bytes exist on disk; no sparse files or seeking past data.
+            tile = rng.randbytes(256)
+            payload = (tile * ((size + 255) // 256))[:size]
+            stream.write(struct.pack("<III", size, offset, keep))
+            stream.write(payload)
+            out = struct.pack("<I", keep) + payload[offset:offset + keep]
+            expected.update(out)
+            total += len(out)
+    return {"path": path.name, "shape": shape, "records": count, "seed": seed,
+            "input_bytes": path.stat().st_size, "input_sha256": digest(path),
+            "expected_output_bytes": total, "expected_output_sha256": expected.hexdigest()}
+
+
+def reference(data):
+    result = bytearray()
+    at = 0
+    while at < len(data):
+        if len(data) - at < 12:
+            raise ValueError("short header")
+        size, offset, keep = struct.unpack_from("<III", data, at)
+        at += 12
+        if not 0 < size <= 8 * 1024 * 1024 or not 0 < keep <= size or offset > size - keep:
+            raise ValueError("invalid frame")
+        if len(data) - at < size:
+            raise ValueError("short payload")
+        result.extend(struct.pack("<I", keep))
+        result.extend(data[at + offset:at + offset + keep])
+        at += size
+    return bytes(result)
+
+
+def command(binary, case, policy, *extra):
+    args = [str(binary), "--policy", policy["policy"], "--pool", str(policy.get("pool", 1)),
+            "--ratio", str(policy.get("ratio", 4)), "--budget", str(case.get("budget", 8388608)),
+            "--slots", str(case.get("slots", 512)), "--hold-us", str(case.get("hold_us", 0)),
+            "--service-us", str(case.get("service_us", 0))]
+    return args + list(extra)
+
+
+def metrics(stderr):
+    # Sanitizer diagnostics must not be silently ignored.
+    text = stderr.decode().strip()
+    try:
+        result = json.loads(text)
+    except json.JSONDecodeError as exc:
+        raise AssertionError(f"Expected metrics only; tool/runtime diagnostics:\n{text}") from exc
+    assert result["unreleased_buffer_bytes"] == 0, result
+    assert result["peak_active_bytes"] <= result["peak_reserved_bytes"] <= result["budget_bytes"], result
+    return result
+
+
+def check(binary, tmp, policies):
+    checks = []
+    test = tmp / "test.frames"
+    fixture(test, "test", 45, 177)
+    data = test.read_bytes()
+    expected = reference(data)
+    for policy in policies:
+        for slow in [False, True]:
+            case = {"slots": 7, "hold_us": 100 if slow else 0, "budget": 300000}
+            result = subprocess.run(command(binary, case, policy), input=data, capture_output=True, timeout=15)
+            m = metrics(result.stderr)
+            assert result.returncode == 0 and m["status"] == "ok", (policy, result.stderr)
+            assert result.stdout == expected and m["emitted"] == 45
+            assert m["input_bytes"] == len(data) and m["output_bytes"] == len(expected)
+            assert m["live_at_stop_bytes"] == 0
+            checks.append(f'{policy["name"]}: byte equality, accounting, cleanup, slow={slow}')
+        # Truncation at both header and payload boundaries, including exact missing payload.
+        bad_inputs = [b"x", struct.pack("<III", 12, 0, 4),
+                      struct.pack("<III", 12, 0, 4) + b"123",
+                      struct.pack("<III", 12, 11, 4) + b"x" * 12,
+                      struct.pack("<III", 0, 0, 0),
+                      struct.pack("<III", 8 * 1024 * 1024 + 1, 0, 1)]
+        for bad in bad_inputs:
+            result = subprocess.run(command(binary, {"hold_us": 1000}, policy),
+                                    input=data[:13] + bad, capture_output=True, timeout=15)
+            m = metrics(result.stderr)
+            assert result.returncode == 2 and m["status"] in {"invalid_frame", "truncated_input"}
+        checks.append(f'{policy["name"]}: six malformed inputs with pending buffer cleanup')
+        result = subprocess.run(command(binary, {"hold_us": 1000}, policy, "--cancel-after", "3"),
+                                input=data, capture_output=True, timeout=15)
+        m = metrics(result.stderr)
+        prefix_end = 0
+        for _ in range(3):
+            prefix_end += 4 + struct.unpack_from("<I", expected, prefix_end)[0]
+        assert result.returncode == 3 and m["status"] == "cancelled" and m["emitted"] == 3
+        assert result.stdout == expected[:prefix_end]
+        checks.append(f'{policy["name"]}: cancellation preserves completed output prefix and releases pending buffers')
+        result = subprocess.run(command(binary, {}, policy), input=b"", capture_output=True, timeout=15)
+        assert result.returncode == 0 and metrics(result.stderr)["emitted"] == 0
+        checks.append(f'{policy["name"]}: empty stream')
+    # Tight budget must refuse a whole-frame requirement, while streaming projection can work.
+    large = struct.pack("<III", 1048576, 17, 64) + b"a" * 1048576
+    for policy in policies:
+        result = subprocess.run(command(binary, {"budget": 131072, "slots": 1}, policy),
+                                input=large, capture_output=True, timeout=15)
+        m = metrics(result.stderr)
+        assert m["status"] == ("ok" if policy["policy"] == "project" else "budget_too_small")
+    checks.append("frame larger than buffer budget: bounded refusal versus projection")
+    if Path("/dev/full").exists():
+        with open("/dev/full", "wb") as sink:
+            result = subprocess.run(command(binary, {"hold_us": 1000}, policies[0]), input=data,
+                                    stdout=sink, stderr=subprocess.PIPE, timeout=15)
+        assert result.returncode == 2 and metrics(result.stderr)["status"] == "output_failed"
+        checks.append("real output failure through /dev/full, pending buffers released")
+    # Real signal cancellation after allocation, while waiting for the delayed sink.
+    with test.open("rb") as source, open(os.devnull, "wb") as sink:
+        proc = subprocess.Popen(command(binary, {"hold_us": 500000}, policies[0]),
+                                stdin=source, stdout=sink, stderr=subprocess.PIPE)
+        time.sleep(0.08)
+        proc.send_signal(signal.SIGTERM)
+        _, error = proc.communicate(timeout=5)
+    assert proc.returncode == 3 and metrics(error)["status"] == "cancelled", error
+    checks.append("SIGTERM interrupts delayed sink and releases buffers")
+    if platform.system() == "Linux":
+        # Regression: inherited rusage peak cannot stand in for current-image HWM.
+        resident = tmp / "rss.frames"
+        fixture(resident, "sparse", 512, 817)
+        values = {}
+        for policy in [{"policy": "borrow"}, {"policy": "project"}]:
+            with resident.open("rb") as source, open(os.devnull, "wb") as sink:
+                result = subprocess.run(command(binary, {"hold_us": 10000}, policy),
+                                        stdin=source, stdout=sink, stderr=subprocess.PIPE, timeout=15)
+            m = metrics(result.stderr)
+            assert result.returncode == 0 and m["rss_peak_source"] == "linux_proc_vmhwm_approximate"
+            assert m["rss_peak_bytes"] > 0
+            values[policy["policy"]] = m["rss_peak_bytes"]
+        # Only a sanity check for this deliberately wide memory gap, not exact RSS arithmetic.
+        assert values["borrow"] > values["project"], values
+        checks.append("current-image VmHWM distinguishes large retained sources from small projections")
+    return checks
+
+
+def sample(binary, source, output, case, policy):
+    with source.open("rb") as inp, output.open("wb") as out:
+        result = subprocess.run(command(binary, case, policy), stdin=inp, stdout=out,
+                                stderr=subprocess.PIPE, timeout=30)
+    m = metrics(result.stderr)
+    assert result.returncode == 0 and m["status"] == "ok", result.stderr
+    return m
+
+
+def summarize(rows):
+    result = []
+    names = ["elapsed_ns", "cpu_ns", "peak_reserved_bytes", "peak_active_bytes", "rss_peak_bytes",
+             "copy_bytes", "active_byte_seconds", "latency_mean_ns", "latency_p99_upper_ns",
+             "budget_waits", "allocations", "reuses"]
+    groups = sorted({(r["case"], r["variant"]) for r in rows})
+    for case, variant in groups:
+        group = [r for r in rows if (r["case"], r["variant"]) == (case, variant)]
+        value = {"case": case, "variant": variant, "samples": len(group)}
+        for name in names:
+            values = [r[name] for r in group]
+            value[name] = {"median": statistics.median(values), "min": min(values), "max": max(values)}
+        result.append(value)
+    return result
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--check-only", action="store_true")
+    parser.add_argument("--output", type=Path)
+    args = parser.parse_args()
+    if not args.check_only and args.output is None:
+        parser.error("provide --check-only or --output (new directory)")
+    if args.output:
+        args.output.mkdir(parents=True, exist_ok=False)
+    cc = shlex.split(os.environ.get("CC", "cc"))
+    plan = json.loads((ROOT / "plan.json").read_text())
+    affinity = None
+    if hasattr(os, "sched_getaffinity"):
+        affinity = min(os.sched_getaffinity(0))
+        os.sched_setaffinity(0, {affinity})
+    with tempfile.TemporaryDirectory(prefix="pure-retention-") as folder:
+        tmp = Path(folder)
+        native, sanitized = tmp / "bench", tmp / "bench-sanitized"
+        builds = [build(cc, native), build(cc, sanitized, True)]
+        verification = {"native": check(native, tmp, plan["policies"]),
+                        "asan_ubsan": check(sanitized, tmp, plan["policies"])}
+        print(f'Verified {sum(map(len, verification.values()))} scenario groups (native + ASan/UBSan).', flush=True)
+        if args.check_only:
+            return
+        sources = {name: digest(ROOT / name) for name in ["benchmark.c", "run.py", "plan.json"]}
+        environment = {"platform": platform.platform(), "machine": platform.machine(),
+                       "python": platform.python_version(), "cpu_affinity": affinity,
+                       "compiler": subprocess.check_output([*cc, "--version"], text=True),
+                       "builds": builds, "source_sha256": sources,
+                       "clock": "CLOCK_MONOTONIC; CPU = CLOCK_PROCESS_CPUTIME_ID",
+                       "timing": "includes file IO, scheduling, deliberate sleep, metrics, buffer cleanup; excludes startup/build/fixture/verification",
+                       "limitations": "shared host; unregulated thermals; cached files; output page cache, no fsync; synthetic closed-loop arrivals",
+                       "started_utc": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())}
+        if Path("/proc/cpuinfo").exists():
+            environment["cpuinfo"] = Path("/proc/cpuinfo").read_text()
+        dump(args.output / "environment.json", environment)
+        dump(args.output / "verification.json", verification)
+        dump(args.output / "plan.json", plan)
+        (args.output / "sources").mkdir()
+        for name in sources:
+            (args.output / "sources" / name).write_bytes((ROOT / name).read_bytes())
+        fixtures, rows = [], []
+        rng = random.Random(plan["seed"])
+        for case in plan["cases"]:
+            source, output = tmp / "input.frames", tmp / "output.frames"
+            info = fixture(source, case["shape"], case["records"], plan["seed"])
+            info["case"] = case["name"]
+            fixtures.append(info)
+            # Warm each strategy once. The following measurements use fresh processes.
+            for policy in plan["policies"]:
+                sample(native, source, output, case, policy)
+                assert digest(output) == info["expected_output_sha256"]
+            for repeat in range(plan["repeats"]):
+                order = list(plan["policies"])
+                rng.shuffle(order)
+                for policy in order:
+                    m = sample(native, source, output, case, policy)
+                    assert m["accepted"] == m["emitted"] == case["records"]
+                    assert m["input_bytes"] == info["input_bytes"]
+                    assert m["output_bytes"] == info["expected_output_bytes"]
+                    assert digest(output) == info["expected_output_sha256"]
+                    rows.append({"case": case["name"], "variant": policy["name"], "repeat": repeat, **m})
+            dump(args.output / "raw.json", rows)
+            dump(args.output / "fixtures.json", fixtures)
+            print(f'Completed {case["name"]}: {len(plan["policies"])} variants x {plan["repeats"]} trials.', flush=True)
+        dump(args.output / "summary.json", summarize(rows))
+        with (args.output / "raw.csv").open("w") as out:
+            writer = csv.DictWriter(out, fieldnames=list(rows[0]))
+            writer.writeheader()
+            writer.writerows(rows)
+        # Detect accidental source edits during a measurement run.
+        assert sources == {name: digest(ROOT / name) for name in sources}
+        dump(args.output / "complete.json", {"samples": len(rows), "all_output_hashes_match": True,
+                                             "finished_utc": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())})
+        print(args.output.resolve())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/summary.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/summary.json
new file mode 100644
index 0000000..fceebba
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/summary.json
@@ -0,0 +1,3122 @@
+[
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 176146657,
+      "min": 160544406,
+      "max": 186194683
+    },
+    "cpu_ns": {
+      "median": 82398748,
+      "min": 78514601,
+      "max": 90636057
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1395956.019109,
+      "min": 1263635.432461,
+      "max": 1477291.36261
+    },
+    "latency_mean_ns": {
+      "median": 10456864.841,
+      "min": 9456018.519,
+      "max": 11071491.94
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 12582912,
+      "max": 13631488
+    },
+    "budget_waits": {
+      "median": 1605,
+      "min": 1220,
+      "max": 1865
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 181070273,
+      "min": 162629252,
+      "max": 184530299
+    },
+    "cpu_ns": {
+      "median": 83392187,
+      "min": 78669541,
+      "max": 88543490
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 100663296,
+      "min": 100663296,
+      "max": 100663296
+    },
+    "active_byte_seconds": {
+      "median": 1435135.645514,
+      "min": 1279274.820821,
+      "max": 1465541.553301
+    },
+    "latency_mean_ns": {
+      "median": 10688072.436,
+      "min": 9526763.21,
+      "max": 10914646.174
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 12582912,
+      "max": 12582912
+    },
+    "budget_waits": {
+      "median": 1923,
+      "min": 1913,
+      "max": 1923
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 3970,
+      "min": 3970,
+      "max": 3970
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 181746660,
+      "min": 133391651,
+      "max": 185672333
+    },
+    "cpu_ns": {
+      "median": 80542923,
+      "min": 79010560,
+      "max": 112766017
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 100663296,
+      "min": 100663296,
+      "max": 100663296
+    },
+    "active_byte_seconds": {
+      "median": 1442582.012105,
+      "min": 1038602.867364,
+      "max": 1473966.510893
+    },
+    "latency_mean_ns": {
+      "median": 10743611.753,
+      "min": 7733517.169,
+      "max": 10977524.849
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 12582912
+    },
+    "budget_waits": {
+      "median": 1923,
+      "min": 1523,
+      "max": 1923
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 180208516,
+      "min": 169205769,
+      "max": 181604364
+    },
+    "cpu_ns": {
+      "median": 83532190,
+      "min": 78951924,
+      "max": 93894859
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9486336,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1428781.613196,
+      "min": 1323477.613603,
+      "max": 1442046.73663
+    },
+    "latency_mean_ns": {
+      "median": 10704952.958,
+      "min": 9905630.789,
+      "max": 10805826.457
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 14680064
+    },
+    "budget_waits": {
+      "median": 1755,
+      "min": 1358,
+      "max": 1794
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 181552086,
+      "min": 172321224,
+      "max": 187716865
+    },
+    "cpu_ns": {
+      "median": 80699818,
+      "min": 74974355,
+      "max": 93701381
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1438045.689091,
+      "min": 1352204.310615,
+      "max": 1492582.952313
+    },
+    "latency_mean_ns": {
+      "median": 10774249.202,
+      "min": 10121009.211,
+      "max": 11188037.068
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 12582912,
+      "max": 13631488
+    },
+    "budget_waits": {
+      "median": 1690,
+      "min": 1317,
+      "max": 1885
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 177206635,
+      "min": 133633132,
+      "max": 179808887
+    },
+    "cpu_ns": {
+      "median": 83537344,
+      "min": 82100973,
+      "max": 106591389
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1405563.035864,
+      "min": 1042347.024547,
+      "max": 1427516.577261
+    },
+    "latency_mean_ns": {
+      "median": 10529385.897,
+      "min": 7778565.752,
+      "max": 10695483.804
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 12582912
+    },
+    "budget_waits": {
+      "median": 1640,
+      "min": 396,
+      "max": 1739
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 161215386,
+      "min": 150178547,
+      "max": 177934893
+    },
+    "cpu_ns": {
+      "median": 89862451,
+      "min": 82048383,
+      "max": 99861953
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1273441.862727,
+      "min": 1171761.488413,
+      "max": 1411845.015325
+    },
+    "latency_mean_ns": {
+      "median": 9530310.653,
+      "min": 8764951.531,
+      "max": 10577573.546
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 12582912
+    },
+    "budget_waits": {
+      "median": 1244,
+      "min": 890,
+      "max": 1719
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 177819652,
+      "min": 154311406,
+      "max": 184526170
+    },
+    "cpu_ns": {
+      "median": 80765616,
+      "min": 78362511,
+      "max": 92958406
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1410709.704111,
+      "min": 1216142.805053,
+      "max": 1466214.025114
+    },
+    "latency_mean_ns": {
+      "median": 10569593.51,
+      "min": 9096496.741,
+      "max": 10988073.928
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 12582912
+    },
+    "budget_waits": {
+      "median": 1732,
+      "min": 1082,
+      "max": 1834
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 156530676,
+      "min": 154664385,
+      "max": 160859182
+    },
+    "cpu_ns": {
+      "median": 80398481,
+      "min": 75260445,
+      "max": 83693169
+    },
+    "peak_reserved_bytes": {
+      "median": 8386736,
+      "min": 8386736,
+      "max": 8386736
+    },
+    "peak_active_bytes": {
+      "median": 8386688,
+      "min": 8386688,
+      "max": 8386736
+    },
+    "rss_peak_bytes": {
+      "median": 11059200,
+      "min": 11042816,
+      "max": 11059200
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1232378.631527,
+      "min": 1217311.080951,
+      "max": 1265871.620641
+    },
+    "latency_mean_ns": {
+      "median": 6972909.934,
+      "min": 6891592.543,
+      "max": 7168367.113
+    },
+    "latency_p99_upper_ns": {
+      "median": 9437184,
+      "min": 9437184,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1014,
+      "min": 998,
+      "max": 1060
+    },
+    "allocations": {
+      "median": 1298,
+      "min": 1286,
+      "max": 1309
+    },
+    "reuses": {
+      "median": 750,
+      "min": 739,
+      "max": 762
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 148908587,
+      "min": 148231627,
+      "max": 160379239
+    },
+    "cpu_ns": {
+      "median": 62691660,
+      "min": 60872675,
+      "max": 76853903
+    },
+    "peak_reserved_bytes": {
+      "median": 8388576,
+      "min": 8388560,
+      "max": 8388576
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388544
+    },
+    "rss_peak_bytes": {
+      "median": 11583488,
+      "min": 11026432,
+      "max": 11583488
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 1068483.42084,
+      "min": 1061176.084143,
+      "max": 1126649.918907
+    },
+    "latency_mean_ns": {
+      "median": 19542842.845,
+      "min": 19421431.677,
+      "max": 20559126.612
+    },
+    "latency_p99_upper_ns": {
+      "median": 27262976,
+      "min": 27262976,
+      "max": 31457280
+    },
+    "budget_waits": {
+      "median": 1060,
+      "min": 945,
+      "max": 1082
+    },
+    "allocations": {
+      "median": 2282,
+      "min": 2142,
+      "max": 2295
+    },
+    "reuses": {
+      "median": 1814,
+      "min": 1801,
+      "max": 1954
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 149074586,
+      "min": 147730720,
+      "max": 156784527
+    },
+    "cpu_ns": {
+      "median": 62457772,
+      "min": 59461567,
+      "max": 75333533
+    },
+    "peak_reserved_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388544
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388544
+    },
+    "rss_peak_bytes": {
+      "median": 11059200,
+      "min": 11042816,
+      "max": 11583488
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 1068598.834234,
+      "min": 1058083.377077,
+      "max": 1106709.142867
+    },
+    "latency_mean_ns": {
+      "median": 19570212.309,
+      "min": 19373026.656,
+      "max": 20225367.343
+    },
+    "latency_p99_upper_ns": {
+      "median": 27262976,
+      "min": 27262976,
+      "max": 29360128
+    },
+    "budget_waits": {
+      "median": 1070,
+      "min": 936,
+      "max": 1091
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 150607823,
+      "min": 150346490,
+      "max": 157820358
+    },
+    "cpu_ns": {
+      "median": 62794080,
+      "min": 61910200,
+      "max": 72816171
+    },
+    "peak_reserved_bytes": {
+      "median": 8388560,
+      "min": 8388560,
+      "max": 8388560
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388448
+    },
+    "rss_peak_bytes": {
+      "median": 11059200,
+      "min": 11026432,
+      "max": 11059200
+    },
+    "copy_bytes": {
+      "median": 27916032,
+      "min": 27916032,
+      "max": 27916032
+    },
+    "active_byte_seconds": {
+      "median": 1091824.795529,
+      "min": 1088594.710179,
+      "max": 1145134.388634
+    },
+    "latency_mean_ns": {
+      "median": 19672453.154,
+      "min": 19620014.043,
+      "max": 20627967.734
+    },
+    "latency_p99_upper_ns": {
+      "median": 27262976,
+      "min": 27262976,
+      "max": 27262976
+    },
+    "budget_waits": {
+      "median": 1045,
+      "min": 983,
+      "max": 1052
+    },
+    "allocations": {
+      "median": 2188,
+      "min": 2118,
+      "max": 2194
+    },
+    "reuses": {
+      "median": 1559,
+      "min": 1553,
+      "max": 1629
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 155323458,
+      "min": 152663243,
+      "max": 161035903
+    },
+    "cpu_ns": {
+      "median": 60922941,
+      "min": 58871841,
+      "max": 71350453
+    },
+    "peak_reserved_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "peak_active_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "rss_peak_bytes": {
+      "median": 11567104,
+      "min": 11042816,
+      "max": 11583488
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1124769.099854,
+      "min": 1105768.632536,
+      "max": 1171929.531923
+    },
+    "latency_mean_ns": {
+      "median": 21013565.399,
+      "min": 20645944.552,
+      "max": 21900800.478
+    },
+    "latency_p99_upper_ns": {
+      "median": 29360128,
+      "min": 29360128,
+      "max": 31457280
+    },
+    "budget_waits": {
+      "median": 1009,
+      "min": 940,
+      "max": 1025
+    },
+    "allocations": {
+      "median": 1712,
+      "min": 1684,
+      "max": 1715
+    },
+    "reuses": {
+      "median": 336,
+      "min": 333,
+      "max": 364
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 151434543,
+      "min": 150924192,
+      "max": 154875385
+    },
+    "cpu_ns": {
+      "median": 62824900,
+      "min": 62137633,
+      "max": 63073539
+    },
+    "peak_reserved_bytes": {
+      "median": 8388560,
+      "min": 8388560,
+      "max": 8388560
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388448
+    },
+    "rss_peak_bytes": {
+      "median": 11042816,
+      "min": 11010048,
+      "max": 11583488
+    },
+    "copy_bytes": {
+      "median": 28479696,
+      "min": 28479696,
+      "max": 28479696
+    },
+    "active_byte_seconds": {
+      "median": 1089269.648492,
+      "min": 1085460.729712,
+      "max": 1114766.522227
+    },
+    "latency_mean_ns": {
+      "median": 19945957.829,
+      "min": 19880247.948,
+      "max": 20387628.756
+    },
+    "latency_p99_upper_ns": {
+      "median": 27262976,
+      "min": 27262976,
+      "max": 29360128
+    },
+    "budget_waits": {
+      "median": 1066,
+      "min": 1055,
+      "max": 1076
+    },
+    "allocations": {
+      "median": 2185,
+      "min": 2181,
+      "max": 2196
+    },
+    "reuses": {
+      "median": 1603,
+      "min": 1592,
+      "max": 1607
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154278831,
+      "min": 153954221,
+      "max": 158364004
+    },
+    "cpu_ns": {
+      "median": 65116485,
+      "min": 64368954,
+      "max": 67436217
+    },
+    "peak_reserved_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "peak_active_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "rss_peak_bytes": {
+      "median": 11059200,
+      "min": 11042816,
+      "max": 11059200
+    },
+    "copy_bytes": {
+      "median": 11229392,
+      "min": 11229392,
+      "max": 11229392
+    },
+    "active_byte_seconds": {
+      "median": 1146944.244493,
+      "min": 1145843.306835,
+      "max": 1180098.881536
+    },
+    "latency_mean_ns": {
+      "median": 15979998.057,
+      "min": 15956645.429,
+      "max": 16427087.508
+    },
+    "latency_p99_upper_ns": {
+      "median": 20971520,
+      "min": 20971520,
+      "max": 23068672
+    },
+    "budget_waits": {
+      "median": 1101,
+      "min": 1082,
+      "max": 1113
+    },
+    "allocations": {
+      "median": 1938,
+      "min": 1915,
+      "max": 1951
+    },
+    "reuses": {
+      "median": 1467,
+      "min": 1454,
+      "max": 1490
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 155250569,
+      "min": 154832681,
+      "max": 159080169
+    },
+    "cpu_ns": {
+      "median": 68708379,
+      "min": 68111825,
+      "max": 72479922
+    },
+    "peak_reserved_bytes": {
+      "median": 8388480,
+      "min": 8388480,
+      "max": 8388480
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 10895360,
+      "min": 10534912,
+      "max": 10928128
+    },
+    "copy_bytes": {
+      "median": 3824848,
+      "min": 3824848,
+      "max": 3824848
+    },
+    "active_byte_seconds": {
+      "median": 1176609.476886,
+      "min": 1173410.180784,
+      "max": 1202455.090015
+    },
+    "latency_mean_ns": {
+      "median": 12540132.329,
+      "min": 12500210.727,
+      "max": 12818618.589
+    },
+    "latency_p99_upper_ns": {
+      "median": 15728640,
+      "min": 15728640,
+      "max": 16777216
+    },
+    "budget_waits": {
+      "median": 1080,
+      "min": 1052,
+      "max": 1091
+    },
+    "allocations": {
+      "median": 1844,
+      "min": 1823,
+      "max": 1856
+    },
+    "reuses": {
+      "median": 1212,
+      "min": 1200,
+      "max": 1233
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 493631884,
+      "min": 491778453,
+      "max": 495149938
+    },
+    "cpu_ns": {
+      "median": 77876795,
+      "min": 73168533,
+      "max": 81275705
+    },
+    "peak_reserved_bytes": {
+      "median": 2094128,
+      "min": 2094128,
+      "max": 2094128
+    },
+    "peak_active_bytes": {
+      "median": 2094128,
+      "min": 2094128,
+      "max": 2094128
+    },
+    "rss_peak_bytes": {
+      "median": 3719168,
+      "min": 3702784,
+      "max": 4243456
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 930117.776585,
+      "min": 926994.460577,
+      "max": 933361.552539
+    },
+    "latency_mean_ns": {
+      "median": 5487868.994,
+      "min": 5473786.015,
+      "max": 5510109.537
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "budget_waits": {
+      "median": 1396,
+      "min": 1381,
+      "max": 1408
+    },
+    "allocations": {
+      "median": 1342,
+      "min": 1338,
+      "max": 1352
+    },
+    "reuses": {
+      "median": 706,
+      "min": 696,
+      "max": 710
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 191245856,
+      "min": 191037345,
+      "max": 191774166
+    },
+    "cpu_ns": {
+      "median": 62157319,
+      "min": 60906478,
+      "max": 62795054
+    },
+    "peak_reserved_bytes": {
+      "median": 2097152,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4407296
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 346194.049558,
+      "min": 345866.556263,
+      "max": 346663.433689
+    },
+    "latency_mean_ns": {
+      "median": 6050681.287,
+      "min": 6044094.394,
+      "max": 6064467.489
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "budget_waits": {
+      "median": 1373,
+      "min": 1361,
+      "max": 1387
+    },
+    "allocations": {
+      "median": 2479,
+      "min": 2461,
+      "max": 2491
+    },
+    "reuses": {
+      "median": 1617,
+      "min": 1605,
+      "max": 1635
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 192676756,
+      "min": 189986910,
+      "max": 195726691
+    },
+    "cpu_ns": {
+      "median": 64089681,
+      "min": 58086718,
+      "max": 71826579
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4243456
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 347823.24917,
+      "min": 343741.458999,
+      "max": 353204.287515
+    },
+    "latency_mean_ns": {
+      "median": 6074626.45,
+      "min": 6008153.507,
+      "max": 6160078.753
+    },
+    "latency_p99_upper_ns": {
+      "median": 9437184,
+      "min": 8388608,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1348,
+      "min": 1284,
+      "max": 1383
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 190688005,
+      "min": 189790379,
+      "max": 193714972
+    },
+    "cpu_ns": {
+      "median": 63157202,
+      "min": 60625611,
+      "max": 65297407
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4456448
+    },
+    "copy_bytes": {
+      "median": 28385168,
+      "min": 28385168,
+      "max": 28385168
+    },
+    "active_byte_seconds": {
+      "median": 347120.008423,
+      "min": 345327.900203,
+      "max": 352390.15124
+    },
+    "latency_mean_ns": {
+      "median": 6138653.731,
+      "min": 6110038.652,
+      "max": 6233962.195
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1378,
+      "min": 1367,
+      "max": 1393
+    },
+    "allocations": {
+      "median": 2369,
+      "min": 2353,
+      "max": 2373
+    },
+    "reuses": {
+      "median": 1406,
+      "min": 1402,
+      "max": 1422
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 175306603,
+      "min": 174670169,
+      "max": 179280258
+    },
+    "cpu_ns": {
+      "median": 57919540,
+      "min": 55539698,
+      "max": 63072197
+    },
+    "peak_reserved_bytes": {
+      "median": 2097120,
+      "min": 2097120,
+      "max": 2097120
+    },
+    "peak_active_bytes": {
+      "median": 2097120,
+      "min": 2097120,
+      "max": 2097120
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4407296
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 326279.178906,
+      "min": 325246.46456,
+      "max": 333023.673744
+    },
+    "latency_mean_ns": {
+      "median": 6273925.584,
+      "min": 6258533.417,
+      "max": 6405571.191
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1310,
+      "min": 1292,
+      "max": 1312
+    },
+    "allocations": {
+      "median": 1726,
+      "min": 1706,
+      "max": 1728
+    },
+    "reuses": {
+      "median": 322,
+      "min": 320,
+      "max": 342
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 188818619,
+      "min": 188314755,
+      "max": 201965490
+    },
+    "cpu_ns": {
+      "median": 63133028,
+      "min": 61699247,
+      "max": 80116546
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4325376
+    },
+    "copy_bytes": {
+      "median": 28479696,
+      "min": 28479696,
+      "max": 28479696
+    },
+    "active_byte_seconds": {
+      "median": 343018.464235,
+      "min": 342240.604823,
+      "max": 364031.028759
+    },
+    "latency_mean_ns": {
+      "median": 6127166.122,
+      "min": 6110229.914,
+      "max": 6483685.515
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1385,
+      "min": 1275,
+      "max": 1395
+    },
+    "allocations": {
+      "median": 2370,
+      "min": 2291,
+      "max": 2380
+    },
+    "reuses": {
+      "median": 1418,
+      "min": 1408,
+      "max": 1497
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 225451606,
+      "min": 224725167,
+      "max": 229047558
+    },
+    "cpu_ns": {
+      "median": 64792167,
+      "min": 63560757,
+      "max": 67894565
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097104,
+      "min": 2097104,
+      "max": 2097104
+    },
+    "rss_peak_bytes": {
+      "median": 4227072,
+      "min": 4227072,
+      "max": 4243456
+    },
+    "copy_bytes": {
+      "median": 11229392,
+      "min": 11229392,
+      "max": 11229392
+    },
+    "active_byte_seconds": {
+      "median": 413690.587373,
+      "min": 412794.10328,
+      "max": 418976.246455
+    },
+    "latency_mean_ns": {
+      "median": 5851904.688,
+      "min": 5841515.207,
+      "max": 5921381.751
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 8388608
+    },
+    "budget_waits": {
+      "median": 1456,
+      "min": 1425,
+      "max": 1459
+    },
+    "allocations": {
+      "median": 2132,
+      "min": 2094,
+      "max": 2134
+    },
+    "reuses": {
+      "median": 1273,
+      "min": 1271,
+      "max": 1311
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 283681970,
+      "min": 282255055,
+      "max": 289852215
+    },
+    "cpu_ns": {
+      "median": 71405280,
+      "min": 67344177,
+      "max": 73110582
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 4243456,
+      "min": 4227072,
+      "max": 4358144
+    },
+    "copy_bytes": {
+      "median": 3824848,
+      "min": 3824848,
+      "max": 3824848
+    },
+    "active_byte_seconds": {
+      "median": 522809.985389,
+      "min": 520513.491017,
+      "max": 533913.89253
+    },
+    "latency_mean_ns": {
+      "median": 5688342.625,
+      "min": 5670280.355,
+      "max": 5811531.61
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7340032,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1378,
+      "min": 1366,
+      "max": 1394
+    },
+    "allocations": {
+      "median": 1986,
+      "min": 1968,
+      "max": 1990
+    },
+    "reuses": {
+      "median": 1070,
+      "min": 1066,
+      "max": 1088
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20176198,
+      "min": 19968383,
+      "max": 28472110
+    },
+    "cpu_ns": {
+      "median": 20176500,
+      "min": 19952888,
+      "max": 28306962
+    },
+    "peak_reserved_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "peak_active_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "rss_peak_bytes": {
+      "median": 1589248,
+      "min": 1572864,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1246.966591,
+      "min": 1236.323437,
+      "max": 1788.400939
+    },
+    "latency_mean_ns": {
+      "median": 9697.062,
+      "min": 9596.16,
+      "max": 13730.123
+    },
+    "latency_p99_upper_ns": {
+      "median": 12288,
+      "min": 11264,
+      "max": 30720
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20493516,
+      "min": 20382034,
+      "max": 21540986
+    },
+    "cpu_ns": {
+      "median": 20493889,
+      "min": 20382277,
+      "max": 21477686
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 1605632,
+      "min": 1572864,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1089.501083,
+      "min": 1084.755978,
+      "max": 1151.439237
+    },
+    "latency_mean_ns": {
+      "median": 9859.747,
+      "min": 9806.967,
+      "max": 10352.839
+    },
+    "latency_p99_upper_ns": {
+      "median": 13312,
+      "min": 12288,
+      "max": 18432
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21265947,
+      "min": 20561183,
+      "max": 28620499
+    },
+    "cpu_ns": {
+      "median": 21072353,
+      "min": 20561592,
+      "max": 28277537
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 1605632,
+      "min": 1589248,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1125.003597,
+      "min": 1084.995845,
+      "max": 1561.617327
+    },
+    "latency_mean_ns": {
+      "median": 10215.53,
+      "min": 9883.337,
+      "max": 13795.514
+    },
+    "latency_p99_upper_ns": {
+      "median": 16384,
+      "min": 12288,
+      "max": 40960
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20305145,
+      "min": 20018290,
+      "max": 23280610
+    },
+    "cpu_ns": {
+      "median": 20305963,
+      "min": 20018407,
+      "max": 23231480
+    },
+    "peak_reserved_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "peak_active_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "rss_peak_bytes": {
+      "median": 1589248,
+      "min": 1572864,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1256.330694,
+      "min": 1238.904613,
+      "max": 1448.645185
+    },
+    "latency_mean_ns": {
+      "median": 9760.602,
+      "min": 9620.129,
+      "max": 11211.571
+    },
+    "latency_p99_upper_ns": {
+      "median": 13312,
+      "min": 12288,
+      "max": 24576
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21524893,
+      "min": 21358726,
+      "max": 22218843
+    },
+    "cpu_ns": {
+      "median": 21525074,
+      "min": 21358833,
+      "max": 22096574
+    },
+    "peak_reserved_bytes": {
+      "median": 90640,
+      "min": 90640,
+      "max": 90640
+    },
+    "peak_active_bytes": {
+      "median": 90640,
+      "min": 90640,
+      "max": 90640
+    },
+    "rss_peak_bytes": {
+      "median": 1540096,
+      "min": 1507328,
+      "max": 1540096
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1.632264,
+      "min": 1.620534,
+      "max": 1.68791
+    },
+    "latency_mean_ns": {
+      "median": 10363.91,
+      "min": 10284.012,
+      "max": 10699.094
+    },
+    "latency_p99_upper_ns": {
+      "median": 13312,
+      "min": 13312,
+      "max": 18432
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20829074,
+      "min": 20421089,
+      "max": 22684901
+    },
+    "cpu_ns": {
+      "median": 20798316,
+      "min": 20421796,
+      "max": 22652390
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 1605632,
+      "min": 1589248,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1111.338342,
+      "min": 1087.202091,
+      "max": 1228.197157
+    },
+    "latency_mean_ns": {
+      "median": 10025.307,
+      "min": 9825.86,
+      "max": 10925.772
+    },
+    "latency_p99_upper_ns": {
+      "median": 15360,
+      "min": 13312,
+      "max": 22528
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20774647,
+      "min": 20604128,
+      "max": 21098686
+    },
+    "cpu_ns": {
+      "median": 20729258,
+      "min": 20604259,
+      "max": 21002369
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 1589248,
+      "min": 1572864,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1106.254829,
+      "min": 1090.792499,
+      "max": 1130.040808
+    },
+    "latency_mean_ns": {
+      "median": 9997.106,
+      "min": 9906.217,
+      "max": 10153.021
+    },
+    "latency_p99_upper_ns": {
+      "median": 14336,
+      "min": 13312,
+      "max": 16384
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 20453663,
+      "min": 20381497,
+      "max": 21122947
+    },
+    "cpu_ns": {
+      "median": 20454074,
+      "min": 20382185,
+      "max": 21019219
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 1589248,
+      "min": 1572864,
+      "max": 1605632
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1090.324497,
+      "min": 1087.257309,
+      "max": 1125.541597
+    },
+    "latency_mean_ns": {
+      "median": 9841.173,
+      "min": 9805.745,
+      "max": 10159.663
+    },
+    "latency_p99_upper_ns": {
+      "median": 13312,
+      "min": 12288,
+      "max": 16384
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167216739,
+      "min": 167156999,
+      "max": 169327288
+    },
+    "cpu_ns": {
+      "median": 44714000,
+      "min": 43876108,
+      "max": 47272489
+    },
+    "peak_reserved_bytes": {
+      "median": 4267968,
+      "min": 4267968,
+      "max": 4267968
+    },
+    "peak_active_bytes": {
+      "median": 4267968,
+      "min": 4267968,
+      "max": 4267968
+    },
+    "rss_peak_bytes": {
+      "median": 5292032,
+      "min": 5292032,
+      "max": 5292032
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 688253.763142,
+      "min": 688195.924843,
+      "max": 694635.953387
+    },
+    "latency_mean_ns": {
+      "median": 5127098.881,
+      "min": 5126680.831,
+      "max": 5174744.393
+    },
+    "latency_p99_upper_ns": {
+      "median": 7340032,
+      "min": 6291456,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 64,
+      "min": 64,
+      "max": 64
+    },
+    "reuses": {
+      "median": 1984,
+      "min": 1984,
+      "max": 1984
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 168358292,
+      "min": 166680851,
+      "max": 177068451
+    },
+    "cpu_ns": {
+      "median": 27312589,
+      "min": 24341624,
+      "max": 34395657
+    },
+    "peak_reserved_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "peak_active_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "rss_peak_bytes": {
+      "median": 1638400,
+      "min": 1622016,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 2055.277015,
+      "min": 1923.416256,
+      "max": 2287.854324
+    },
+    "latency_mean_ns": {
+      "median": 5168010.066,
+      "min": 5125321.995,
+      "max": 5443811.067
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 65,
+      "min": 65,
+      "max": 65
+    },
+    "reuses": {
+      "median": 4031,
+      "min": 4031,
+      "max": 4031
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167165609,
+      "min": 166715000,
+      "max": 168181366
+    },
+    "cpu_ns": {
+      "median": 26167797,
+      "min": 24659146,
+      "max": 26871012
+    },
+    "peak_reserved_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "peak_active_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "rss_peak_bytes": {
+      "median": 1654784,
+      "min": 1638400,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1986.249813,
+      "min": 1919.204343,
+      "max": 2024.80935
+    },
+    "latency_mean_ns": {
+      "median": 5134877.701,
+      "min": 5125611.619,
+      "max": 5163779.497
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167121239,
+      "min": 167023277,
+      "max": 170783358
+    },
+    "cpu_ns": {
+      "median": 44137216,
+      "min": 43204463,
+      "max": 46177893
+    },
+    "peak_reserved_bytes": {
+      "median": 4268048,
+      "min": 4268048,
+      "max": 4268048
+    },
+    "peak_active_bytes": {
+      "median": 4268048,
+      "min": 4268048,
+      "max": 4268048
+    },
+    "rss_peak_bytes": {
+      "median": 5767168,
+      "min": 5750784,
+      "max": 5783552
+    },
+    "copy_bytes": {
+      "median": 2048,
+      "min": 2048,
+      "max": 2048
+    },
+    "active_byte_seconds": {
+      "median": 677483.645644,
+      "min": 677260.281048,
+      "max": 691939.11555
+    },
+    "latency_mean_ns": {
+      "median": 5127462.262,
+      "min": 5125737.978,
+      "max": 5236882.494
+    },
+    "latency_p99_upper_ns": {
+      "median": 7340032,
+      "min": 6291456,
+      "max": 7340032
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 65,
+      "min": 65,
+      "max": 65
+    },
+    "reuses": {
+      "median": 2015,
+      "min": 2015,
+      "max": 2015
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167505794,
+      "min": 166784685,
+      "max": 171072487
+    },
+    "cpu_ns": {
+      "median": 26582076,
+      "min": 25505816,
+      "max": 27568676
+    },
+    "peak_reserved_bytes": {
+      "median": 77760,
+      "min": 77760,
+      "max": 77760
+    },
+    "peak_active_bytes": {
+      "median": 77760,
+      "min": 77760,
+      "max": 77760
+    },
+    "rss_peak_bytes": {
+      "median": 1589248,
+      "min": 1572864,
+      "max": 1589248
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 842.776507,
+      "min": 840.114114,
+      "max": 861.43609
+    },
+    "latency_mean_ns": {
+      "median": 5144362.881,
+      "min": 5128089.141,
+      "max": 5258257.061
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 64,
+      "min": 64,
+      "max": 64
+    },
+    "reuses": {
+      "median": 1984,
+      "min": 1984,
+      "max": 1984
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167148609,
+      "min": 166724425,
+      "max": 167663571
+    },
+    "cpu_ns": {
+      "median": 25957735,
+      "min": 24304145,
+      "max": 26966696
+    },
+    "peak_reserved_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "peak_active_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "rss_peak_bytes": {
+      "median": 1638400,
+      "min": 1622016,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1998.277517,
+      "min": 1915.595622,
+      "max": 2058.951339
+    },
+    "latency_mean_ns": {
+      "median": 5134098.172,
+      "min": 5125215.218,
+      "max": 5147482.869
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 65,
+      "min": 65,
+      "max": 65
+    },
+    "reuses": {
+      "median": 4031,
+      "min": 4031,
+      "max": 4031
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 166829203,
+      "min": 166770166,
+      "max": 168266032
+    },
+    "cpu_ns": {
+      "median": 25212214,
+      "min": 24368638,
+      "max": 25648470
+    },
+    "peak_reserved_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "peak_active_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "rss_peak_bytes": {
+      "median": 1638400,
+      "min": 1638400,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1964.863682,
+      "min": 1922.285206,
+      "max": 1987.487947
+    },
+    "latency_mean_ns": {
+      "median": 5128818.551,
+      "min": 5126749.497,
+      "max": 5170189.028
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 65,
+      "min": 65,
+      "max": 65
+    },
+    "reuses": {
+      "median": 4031,
+      "min": 4031,
+      "max": 4031
+    }
+  },
+  {
+    "case": "sparse_slots64",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 167352294,
+      "min": 166717963,
+      "max": 169611954
+    },
+    "cpu_ns": {
+      "median": 26149112,
+      "min": 24643191,
+      "max": 32536976
+    },
+    "peak_reserved_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "peak_active_bytes": {
+      "median": 143312,
+      "min": 143312,
+      "max": 143312
+    },
+    "rss_peak_bytes": {
+      "median": 1638400,
+      "min": 1622016,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1998.899707,
+      "min": 1926.54795,
+      "max": 2319.792062
+    },
+    "latency_mean_ns": {
+      "median": 5140639.04,
+      "min": 5125971.683,
+      "max": 5206380.796
+    },
+    "latency_p99_upper_ns": {
+      "median": 7864320,
+      "min": 7864320,
+      "max": 7864320
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 65,
+      "min": 65,
+      "max": 65
+    },
+    "reuses": {
+      "median": 4031,
+      "min": 4031,
+      "max": 4031
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 129845439,
+      "min": 106374934,
+      "max": 141446795
+    },
+    "cpu_ns": {
+      "median": 45497318,
+      "min": 44501920,
+      "max": 48356230
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 9486336,
+      "min": 9469952,
+      "max": 9486336
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1022546.229446,
+      "min": 829040.966005,
+      "max": 1119170.099864
+    },
+    "latency_mean_ns": {
+      "median": 7656609.5,
+      "min": 6201710.718,
+      "max": 8382742.796
+    },
+    "latency_p99_upper_ns": {
+      "median": 9437184,
+      "min": 9437184,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1501,
+      "min": 1095,
+      "max": 1729
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 159054504,
+      "min": 154140610,
+      "max": 160143537
+    },
+    "cpu_ns": {
+      "median": 26459012,
+      "min": 23189876,
+      "max": 28160466
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 1703936,
+      "min": 1687552,
+      "max": 1720320
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6705.336146,
+      "min": 6456.771667,
+      "max": 7402.36243
+    },
+    "latency_mean_ns": {
+      "median": 34466956.647,
+      "min": 33183203.845,
+      "max": 34696998.27
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 155595440,
+      "min": 154376239,
+      "max": 162066143
+    },
+    "cpu_ns": {
+      "median": 25896167,
+      "min": 24003453,
+      "max": 36838768
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 1703936,
+      "min": 1687552,
+      "max": 1720320
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6570.059349,
+      "min": 6474.089644,
+      "max": 7046.191505
+    },
+    "latency_mean_ns": {
+      "median": 33573592.059,
+      "min": 33344720.225,
+      "max": 34524425.147
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 153730223,
+      "min": 151916969,
+      "max": 157264009
+    },
+    "cpu_ns": {
+      "median": 27269441,
+      "min": 26295422,
+      "max": 27901892
+    },
+    "peak_reserved_bytes": {
+      "median": 4321888,
+      "min": 4321888,
+      "max": 4321888
+    },
+    "peak_active_bytes": {
+      "median": 4318208,
+      "min": 4316848,
+      "max": 4318768
+    },
+    "rss_peak_bytes": {
+      "median": 5849088,
+      "min": 5832704,
+      "max": 5849088
+    },
+    "copy_bytes": {
+      "median": 113984,
+      "min": 113408,
+      "max": 114176
+    },
+    "active_byte_seconds": {
+      "median": 524904.925261,
+      "min": 513114.693547,
+      "max": 542285.660244
+    },
+    "latency_mean_ns": {
+      "median": 32665634.037,
+      "min": 32537118.75,
+      "max": 33232147.448
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 514,
+      "min": 514,
+      "max": 514
+    },
+    "reuses": {
+      "median": 3315,
+      "min": 3306,
+      "max": 3318
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154249202,
+      "min": 154094443,
+      "max": 157860470
+    },
+    "cpu_ns": {
+      "median": 24700764,
+      "min": 24230112,
+      "max": 28682548
+    },
+    "peak_reserved_bytes": {
+      "median": 131520,
+      "min": 131520,
+      "max": 131520
+    },
+    "peak_active_bytes": {
+      "median": 131520,
+      "min": 131520,
+      "max": 131520
+    },
+    "rss_peak_bytes": {
+      "median": 1638400,
+      "min": 1638400,
+      "max": 1654784
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 5451.483102,
+      "min": 5449.134094,
+      "max": 5603.286251
+    },
+    "latency_mean_ns": {
+      "median": 33273652.65,
+      "min": 33259314.794,
+      "max": 34200243.611
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 512,
+      "min": 512,
+      "max": 512
+    },
+    "reuses": {
+      "median": 1536,
+      "min": 1536,
+      "max": 1536
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154320869,
+      "min": 154022055,
+      "max": 160914091
+    },
+    "cpu_ns": {
+      "median": 24093342,
+      "min": 23087202,
+      "max": 25835642
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 1703936,
+      "min": 1703936,
+      "max": 1720320
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6504.166448,
+      "min": 6450.425541,
+      "max": 6869.973543
+    },
+    "latency_mean_ns": {
+      "median": 33321815.102,
+      "min": 33269305.586,
+      "max": 34925615.31
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 155128904,
+      "min": 154184073,
+      "max": 157308101
+    },
+    "cpu_ns": {
+      "median": 25543272,
+      "min": 23590708,
+      "max": 31229598
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 1703936,
+      "min": 1687552,
+      "max": 1720320
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6610.674553,
+      "min": 6477.65682,
+      "max": 6941.796558
+    },
+    "latency_mean_ns": {
+      "median": 33533790.057,
+      "min": 33299901.746,
+      "max": 33900498.29
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154198518,
+      "min": 154077370,
+      "max": 159785538
+    },
+    "cpu_ns": {
+      "median": 23692568,
+      "min": 23187579,
+      "max": 24425471
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 1703936,
+      "min": 1687552,
+      "max": 1720320
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6492.439639,
+      "min": 6453.368258,
+      "max": 6694.694537
+    },
+    "latency_mean_ns": {
+      "median": 33304172.097,
+      "min": 33277920.587,
+      "max": 34401146.148
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/verification.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/verification.json
new file mode 100644
index 0000000..539be67
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64-v2/verification.json
@@ -0,0 +1,94 @@
+{
+  "native": [
+    "borrow: byte equality, accounting, cleanup, slow=False",
+    "borrow: byte equality, accounting, cleanup, slow=True",
+    "borrow: six malformed inputs with pending buffer cleanup",
+    "borrow: cancellation preserves completed output prefix and releases pending buffers",
+    "borrow: empty stream",
+    "copy: byte equality, accounting, cleanup, slow=False",
+    "copy: byte equality, accounting, cleanup, slow=True",
+    "copy: six malformed inputs with pending buffer cleanup",
+    "copy: cancellation preserves completed output prefix and releases pending buffers",
+    "copy: empty stream",
+    "threshold2: byte equality, accounting, cleanup, slow=False",
+    "threshold2: byte equality, accounting, cleanup, slow=True",
+    "threshold2: six malformed inputs with pending buffer cleanup",
+    "threshold2: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold2: empty stream",
+    "threshold4: byte equality, accounting, cleanup, slow=False",
+    "threshold4: byte equality, accounting, cleanup, slow=True",
+    "threshold4: six malformed inputs with pending buffer cleanup",
+    "threshold4: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold4: empty stream",
+    "threshold8: byte equality, accounting, cleanup, slow=False",
+    "threshold8: byte equality, accounting, cleanup, slow=True",
+    "threshold8: six malformed inputs with pending buffer cleanup",
+    "threshold8: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold8: empty stream",
+    "pressure: byte equality, accounting, cleanup, slow=False",
+    "pressure: byte equality, accounting, cleanup, slow=True",
+    "pressure: six malformed inputs with pending buffer cleanup",
+    "pressure: cancellation preserves completed output prefix and releases pending buffers",
+    "pressure: empty stream",
+    "project: byte equality, accounting, cleanup, slow=False",
+    "project: byte equality, accounting, cleanup, slow=True",
+    "project: six malformed inputs with pending buffer cleanup",
+    "project: cancellation preserves completed output prefix and releases pending buffers",
+    "project: empty stream",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=False",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=True",
+    "copy_no_pool: six malformed inputs with pending buffer cleanup",
+    "copy_no_pool: cancellation preserves completed output prefix and releases pending buffers",
+    "copy_no_pool: empty stream",
+    "frame larger than buffer budget: bounded refusal versus projection",
+    "real output failure through /dev/full, pending buffers released",
+    "SIGTERM interrupts delayed sink and releases buffers",
+    "current-image VmHWM distinguishes large retained sources from small projections"
+  ],
+  "asan_ubsan": [
+    "borrow: byte equality, accounting, cleanup, slow=False",
+    "borrow: byte equality, accounting, cleanup, slow=True",
+    "borrow: six malformed inputs with pending buffer cleanup",
+    "borrow: cancellation preserves completed output prefix and releases pending buffers",
+    "borrow: empty stream",
+    "copy: byte equality, accounting, cleanup, slow=False",
+    "copy: byte equality, accounting, cleanup, slow=True",
+    "copy: six malformed inputs with pending buffer cleanup",
+    "copy: cancellation preserves completed output prefix and releases pending buffers",
+    "copy: empty stream",
+    "threshold2: byte equality, accounting, cleanup, slow=False",
+    "threshold2: byte equality, accounting, cleanup, slow=True",
+    "threshold2: six malformed inputs with pending buffer cleanup",
+    "threshold2: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold2: empty stream",
+    "threshold4: byte equality, accounting, cleanup, slow=False",
+    "threshold4: byte equality, accounting, cleanup, slow=True",
+    "threshold4: six malformed inputs with pending buffer cleanup",
+    "threshold4: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold4: empty stream",
+    "threshold8: byte equality, accounting, cleanup, slow=False",
+    "threshold8: byte equality, accounting, cleanup, slow=True",
+    "threshold8: six malformed inputs with pending buffer cleanup",
+    "threshold8: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold8: empty stream",
+    "pressure: byte equality, accounting, cleanup, slow=False",
+    "pressure: byte equality, accounting, cleanup, slow=True",
+    "pressure: six malformed inputs with pending buffer cleanup",
+    "pressure: cancellation preserves completed output prefix and releases pending buffers",
+    "pressure: empty stream",
+    "project: byte equality, accounting, cleanup, slow=False",
+    "project: byte equality, accounting, cleanup, slow=True",
+    "project: six malformed inputs with pending buffer cleanup",
+    "project: cancellation preserves completed output prefix and releases pending buffers",
+    "project: empty stream",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=False",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=True",
+    "copy_no_pool: six malformed inputs with pending buffer cleanup",
+    "copy_no_pool: cancellation preserves completed output prefix and releases pending buffers",
+    "copy_no_pool: empty stream",
+    "frame larger than buffer budget: bounded refusal versus projection",
+    "real output failure through /dev/full, pending buffers released",
+    "SIGTERM interrupts delayed sink and releases buffers",
+    "current-image VmHWM distinguishes large retained sources from small projections"
+  ]
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/audit.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/audit.json
new file mode 100644
index 0000000..54a4546
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/audit.json
@@ -0,0 +1,6 @@
+{
+  "status": "superseded_by_corrected_measurement",
+  "reason": "All rusage RSS samples were identical at 28753920 bytes. Linux resource usage survives exec; this measure includes pre-exec history and is unsuitable for child image RSS comparison. The corrected run records proc/self/status VmHWM as a separate approximate metric and retains raw rusage. A 64-slot sparse case is added to examine the latency/queue confound. Other first-run observations remain exploratory.",
+  "next_run": "2026-09-22-linux-aarch64-v2",
+  "sources_preserved": true
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/complete.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/complete.json
new file mode 100644
index 0000000..0980f35
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/complete.json
@@ -0,0 +1,5 @@
+{
+  "samples": 200,
+  "all_output_hashes_match": true,
+  "finished_utc": "2026-09-22T12:20:38Z"
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/environment.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/environment.json
new file mode 100644
index 0000000..f5173ae
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/environment.json
@@ -0,0 +1,57 @@
+{
+  "platform": "Linux-6.18.39+rpt-rpi-2712-aarch64-with-glibc2.41",
+  "machine": "aarch64",
+  "python": "3.14.7",
+  "cpu_affinity": 0,
+  "compiler": "cc (Debian 14.2.0-19) 14.2.0\nCopyright (C) 2024 Free Software Foundation, Inc.\nThis is free software; see the source for copying conditions.  There is NO\nwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n",
+  "builds": [
+    {
+      "command": [
+        "cc",
+        "-std=c17",
+        "-Wall",
+        "-Wextra",
+        "-Wpedantic",
+        "-Werror",
+        "-O2",
+        "-g",
+        "/home/eunhhu/work/pure/research/experiments/002-buffer-retention/benchmark.c",
+        "-o",
+        "/tmp/pure-retention-ezjbfrb1/bench"
+      ],
+      "stderr": "",
+      "sha256": "c38e4f6e9e09c77368c1ba188333bc43a8b8a4a1c4500fbdf218ee74545bd2d2",
+      "size_bytes": 99936
+    },
+    {
+      "command": [
+        "cc",
+        "-std=c17",
+        "-Wall",
+        "-Wextra",
+        "-Wpedantic",
+        "-Werror",
+        "-O2",
+        "-g",
+        "-fsanitize=address,undefined",
+        "-fno-omit-frame-pointer",
+        "/home/eunhhu/work/pure/research/experiments/002-buffer-retention/benchmark.c",
+        "-o",
+        "/tmp/pure-retention-ezjbfrb1/bench-sanitized"
+      ],
+      "stderr": "",
+      "sha256": "4810904c7507cc9d8d5550eb6444560f3ed5658a49e7e4a6d753cde23dc32124",
+      "size_bytes": 256136
+    }
+  ],
+  "source_sha256": {
+    "benchmark.c": "68256a441907d944b4f5b3f50d32bb06b349cc18db49e03f5dbd6158c79e2623",
+    "run.py": "d337cd069b63f50f5810875c5fa59e9771ab69333805ab450d182c19e07b814d",
+    "plan.json": "12daa51463df2a4a288adaf85c631f439993e50c9bf3f21fc248c92859ae5214"
+  },
+  "clock": "CLOCK_MONOTONIC; CPU = CLOCK_PROCESS_CPUTIME_ID",
+  "timing": "includes file IO, scheduling, deliberate sleep, metrics, buffer cleanup; excludes startup/build/fixture/verification",
+  "limitations": "shared host; unregulated thermals; cached files; output page cache, no fsync; synthetic closed-loop arrivals",
+  "started_utc": "2026-09-22T12:19:50Z",
+  "cpuinfo": "processor\t: 0\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 1\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 2\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nprocessor\t: 3\nBogoMIPS\t: 108.00\nFeatures\t: fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp\nCPU implementer\t: 0x41\nCPU architecture: 8\nCPU variant\t: 0x4\nCPU part\t: 0xd0b\nCPU revision\t: 1\n\nRevision\t: d04171\nSerial\t\t: d3ba8e625dbe42ac\nModel\t\t: Raspberry Pi 5 Model B Rev 1.1\n"
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/fixtures.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/fixtures.json
new file mode 100644
index 0000000..3a68713
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/fixtures.json
@@ -0,0 +1,57 @@
+[
+  {
+    "path": "input.frames",
+    "shape": "sparse",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "161377ac76f4b7d35b13db7edf3b93bb279ddd83f6514051020e8b49e743d1c0",
+    "expected_output_bytes": 139264,
+    "expected_output_sha256": "a01c7bff45f73512f3bc0dbd02d7c3a1f4ceb09f574d7c25b926cd3d30bb1bfa",
+    "case": "sparse_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "dense",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "fb28c2da0af227079bd6888c3f549fa5a48abd0b790c3939dc330111e80c0b7f",
+    "expected_output_bytes": 100671488,
+    "expected_output_sha256": "d96dd7f80d696895e66521630fd30f13adabf63bea3b84b0a709fbc8c4095aa5",
+    "case": "dense_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "mixed",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 177631232,
+    "input_sha256": "5cfcb8e74d5f30c3a611f373ddf53fd5bc843841d83de42c763e1d931403521d",
+    "expected_output_bytes": 53735632,
+    "expected_output_sha256": "f6b4eb83e7ca9aa4b5b2e0675d34b656815c82c992700ee9cbd7e0a15594cb0b",
+    "case": "mixed_slow"
+  },
+  {
+    "path": "input.frames",
+    "shape": "mixed",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 177631232,
+    "input_sha256": "5cfcb8e74d5f30c3a611f373ddf53fd5bc843841d83de42c763e1d931403521d",
+    "expected_output_bytes": 53735632,
+    "expected_output_sha256": "f6b4eb83e7ca9aa4b5b2e0675d34b656815c82c992700ee9cbd7e0a15594cb0b",
+    "case": "mixed_tight"
+  },
+  {
+    "path": "input.frames",
+    "shape": "sparse",
+    "records": 2048,
+    "seed": 20260922,
+    "input_bytes": 134242304,
+    "input_sha256": "161377ac76f4b7d35b13db7edf3b93bb279ddd83f6514051020e8b49e743d1c0",
+    "expected_output_bytes": 139264,
+    "expected_output_sha256": "a01c7bff45f73512f3bc0dbd02d7c3a1f4ceb09f574d7c25b926cd3d30bb1bfa",
+    "case": "sparse_fast"
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/plan.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/plan.json
new file mode 100644
index 0000000..349e5e2
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/plan.json
@@ -0,0 +1,103 @@
+{
+  "version": 1,
+  "written_before_measurement": true,
+  "seed": 20260922,
+  "repeats": 5,
+  "slots": 512,
+  "policies": [
+    {
+      "name": "borrow",
+      "policy": "borrow",
+      "pool": 1
+    },
+    {
+      "name": "copy",
+      "policy": "copy",
+      "pool": 1
+    },
+    {
+      "name": "threshold2",
+      "policy": "threshold",
+      "ratio": 2,
+      "pool": 1
+    },
+    {
+      "name": "threshold4",
+      "policy": "threshold",
+      "ratio": 4,
+      "pool": 1
+    },
+    {
+      "name": "threshold8",
+      "policy": "threshold",
+      "ratio": 8,
+      "pool": 1
+    },
+    {
+      "name": "pressure",
+      "policy": "pressure",
+      "pool": 1
+    },
+    {
+      "name": "project",
+      "policy": "project",
+      "pool": 1
+    },
+    {
+      "name": "copy_no_pool",
+      "policy": "copy",
+      "pool": 0
+    }
+  ],
+  "cases": [
+    {
+      "name": "sparse_slow",
+      "shape": "sparse",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "dense_slow",
+      "shape": "dense",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "mixed_slow",
+      "shape": "mixed",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "mixed_tight",
+      "shape": "mixed",
+      "records": 2048,
+      "budget": 2097152,
+      "hold_us": 5000,
+      "service_us": 20
+    },
+    {
+      "name": "sparse_fast",
+      "shape": "sparse",
+      "records": 2048,
+      "budget": 8388608,
+      "hold_us": 0,
+      "service_us": 0
+    }
+  ],
+  "expectations": [
+    "Borrow retains full source allocations for small selections.",
+    "Copy can add CPU and transient source plus destination memory for dense selections.",
+    "A current-pressure rule need not outperform a static size rule or early projection.",
+    "Pool reuse can reduce allocation calls while increasing reserved idle memory.",
+    "No Pure-specific advantage, application SLO, or statistical significance is presumed."
+  ],
+  "comparison_rule": "Report all presets and repetitions; no post-hoc winner is called an out-of-sample tuned policy.",
+  "limits": "Single FIFO local pipeline with synthetic delayed sink. No Sonic/Node/.NET benchmark, fan-out, persistent cache, generic JSON parser, external open-loop arrivals, or production SLO."
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.csv b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.csv
new file mode 100644
index 0000000..bf0f08d
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.csv
@@ -0,0 +1,201 @@
+case,variant,repeat,status,policy,pool,budget_bytes,fixed_bytes,peak_reserved_bytes,peak_active_bytes,peak_queue,rss_peak_bytes,elapsed_ns,cpu_ns,input_bytes,output_bytes,accepted,emitted,copy_bytes,copied_records,borrowed_records,pressure_copies,allocations,reuses,budget_waits,slot_waits,sleep_ns,latency_mean_ns,latency_p99_upper_ns,latency_max_ns,active_byte_seconds,live_at_stop_bytes,cached_at_stop_bytes,unreleased_buffer_bytes

+sparse_slow,copy,0,ok,copy,True,8388608,90560,197072,197072,512,28753920,156440711,48121065,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,878,109587045,32718961.288,50331648,47686700,7879.414446,0,66752,0

+sparse_slow,threshold4,0,ok,threshold,True,8388608,90560,197072,197072,512,28753920,152733814,52980104,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,718,102189918,30324683.181,54525952,52327335,7602.229051,0,66752,0

+sparse_slow,threshold2,0,ok,threshold,True,8388608,90560,197072,197072,512,28753920,155247640,47779812,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,809,108519282,31414916.006,54525952,51100228,7369.340036,0,66752,0

+sparse_slow,copy_no_pool,0,ok,copy,False,8388608,90560,197072,197072,512,28753920,164046264,46944898,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,881,113764083,35133900.267,46137344,46051556,8459.440246,0,0,0

+sparse_slow,project,0,ok,project,True,8388608,90560,131520,131520,512,28753920,157789596,25739163,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1536,136058109,34150955.425,41943040,40528961,5595.217111,0,1280,0

+sparse_slow,threshold8,0,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154250903,24028565,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,133827808,33265597.392,37748736,37531339,6504.707846,0,66752,0

+sparse_slow,borrow,0,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,101576920,50248602,134242304,139264,2048,2048,0,0,2048,0,126,1922,825,0,53200392,5868549.98,10485760,10885229,784884.708981,0,1048832,0

+sparse_slow,pressure,0,ok,pressure,True,8388608,90560,4321888,4316448,512,28753920,153086035,29353156,134242304,139264,2048,2048,113152,1768,280,1768,514,3302,0,1424,127637166,32763957.697,41943040,38592411,549197.237404,0,590528,0

+sparse_slow,borrow,1,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,132106520,45409725,134242304,139264,2048,2048,0,0,2048,0,126,1922,1532,0,89610425,7801228.044,9437184,9303567,1041796.843202,0,1048832,0

+sparse_slow,copy_no_pool,1,ok,copy,False,8388608,90560,197072,197072,512,28753920,154376717,24625261,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1534,133550825,33304515.117,37748736,37563136,6521.304714,0,0,0

+sparse_slow,threshold2,1,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154790882,24092354,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134531052,33433846.048,37748736,37877431,6519.648368,0,66752,0

+sparse_slow,threshold4,1,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154495679,24603184,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1536,133731727,33331969.71,37748736,37527099,6535.057316,0,66752,0

+sparse_slow,threshold8,1,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154242976,24135969,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1535,133865874,33299370.61,37748736,37484173,6509.096995,0,66752,0

+sparse_slow,project,1,ok,project,True,8388608,90560,131520,131520,512,28753920,154024996,25025451,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1534,132769732,33212736.419,37748736,37402803,5441.502377,0,1280,0

+sparse_slow,pressure,1,ok,pressure,True,8388608,90560,4321888,4316928,512,28753920,151466095,27009927,134242304,139264,2048,2048,113280,1770,278,1770,514,3304,0,1473,128099292,32391902.953,37748736,37408099,539531.143577,0,590528,0

+sparse_slow,copy,1,ok,copy,True,8388608,90560,197072,197072,512,28753920,155007270,24608283,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1535,134124966,33382726.714,37748736,37593062,6546.135984,0,66752,0

+sparse_slow,threshold4,2,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154312902,23956224,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1535,134085359,33321820.453,37748736,37660191,6502.811837,0,66752,0

+sparse_slow,copy_no_pool,2,ok,copy,False,8388608,90560,197072,197072,512,28753920,154586382,24703970,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1534,133705501,33392210.559,41943040,37987523,6536.248232,0,0,0

+sparse_slow,threshold2,2,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154368809,24191625,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1534,133926227,33288663.865,37748736,37544080,6508.096109,0,66752,0

+sparse_slow,pressure,2,ok,pressure,True,8388608,90560,4321888,4316208,512,28753920,151522021,27174295,134242304,139264,2048,2048,113088,1767,281,1767,514,3301,0,1465,128053394,32398179.535,37748736,37585173,545315.69968,0,590528,0

+sparse_slow,copy,2,ok,copy,True,8388608,90560,197072,197072,512,28753920,154139254,24156681,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1535,133742452,33274854.653,37748736,37580636,6504.184345,0,66752,0

+sparse_slow,project,2,ok,project,True,8388608,90560,131520,131520,512,28753920,154504494,25538018,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1533,132803019,33348679.346,37748736,37696024,5463.772808,0,1280,0

+sparse_slow,threshold8,2,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154268606,24017037,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134039266,33296530.878,37748736,37600117,6499.765006,0,66752,0

+sparse_slow,borrow,2,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,116617303,46471284,134242304,139264,2048,2048,0,0,2048,0,126,1922,1258,0,72494973,6836360.134,9437184,9280234,913414.105279,0,1048832,0

+sparse_slow,project,3,ok,project,True,8388608,90560,131520,131520,512,28753920,155002696,25290252,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1537,133467827,33443160.686,41943040,38061801,5479.253547,0,1280,0

+sparse_slow,borrow,3,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,122707360,46832624,134242304,139264,2048,2048,0,0,2048,0,126,1922,1334,0,78581274,7210177.487,9437184,9450215,963195.592926,0,1048832,0

+sparse_slow,pressure,3,ok,pressure,True,8388608,90560,4321888,4316128,512,28753920,170735523,36085789,134242304,139264,2048,2048,113024,1766,282,1766,514,3300,0,1403,140741412,37128525.741,50331648,49207437,624641.105995,0,590528,0

+sparse_slow,threshold8,3,ok,threshold,True,8388608,90560,197072,197072,512,28753920,161984455,35308455,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1418,132544941,34734342.366,41943040,41927513,7196.657649,0,66752,0

+sparse_slow,threshold2,3,ok,threshold,True,8388608,90560,197072,197072,512,28753920,183186784,39562601,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1377,149944607,39799236.839,50331648,49954231,8175.636446,0,66752,0

+sparse_slow,copy,3,ok,copy,True,8388608,90560,197072,197072,512,28753920,160896124,25740442,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1519,138959714,34942676.828,41943040,40635979,6866.098036,0,66752,0

+sparse_slow,copy_no_pool,3,ok,copy,False,8388608,90560,197072,197072,512,28753920,155242417,24840078,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1534,134375289,33387730.27,41943040,38123912,6526.934401,0,0,0

+sparse_slow,threshold4,3,ok,threshold,True,8388608,90560,197072,197072,512,28753920,153980365,24665615,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1523,133098283,33153737.672,37748736,37518117,6514.197106,0,66752,0

+sparse_slow,copy_no_pool,4,ok,copy,False,8388608,90560,197072,197072,512,28753920,154143199,24004931,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,1536,133901751,33287028.642,37748736,37626617,6483.552028,0,0,0

+sparse_slow,copy,4,ok,copy,True,8388608,90560,197072,197072,512,28753920,153170646,26299681,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1505,130663631,33019408.27,37748736,37369469,6585.869234,0,66752,0

+sparse_slow,threshold4,4,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154103699,23694419,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1537,134088060,33271036.464,37748736,37623950,6485.074292,0,66752,0

+sparse_slow,threshold8,4,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154585216,23936885,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1536,134389609,33393120.598,37748736,38036616,6515.371593,0,66752,0

+sparse_slow,borrow,4,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,124475504,45943956,134242304,139264,2048,2048,0,0,2048,0,126,1922,1468,0,81119761,7320646.162,9437184,9274900,977840.583339,0,1048832,0

+sparse_slow,threshold2,4,ok,threshold,True,8388608,90560,197072,197072,512,28753920,154125217,24321563,134242304,139264,2048,2048,131072,2048,0,0,513,3583,0,1536,133545099,33270620.015,37748736,37515988,6516.994726,0,66752,0

+sparse_slow,pressure,4,ok,pressure,True,8388608,90560,4321888,4317248,512,28753920,151398447,26713792,134242304,139264,2048,2048,113408,1772,276,1772,514,3306,0,1473,128307648,32397554.332,37748736,37324395,535707.02646,0,590528,0

+sparse_slow,project,4,ok,project,True,8388608,90560,131520,131520,512,28753920,154766567,24892483,134242304,139264,2048,2048,0,0,0,0,512,1536,0,1537,133703008,33388895.003,41943040,37874598,5470.365986,0,1280,0

+dense_slow,project,0,ok,project,True,8388608,90560,8350112,8350112,126,28753920,153699255,97036844,134242304,100671488,2048,2048,0,0,0,0,126,1922,890,0,59162056,8908081.106,15728640,16113048,1191532.621299,0,1048832,0

+dense_slow,threshold2,0,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,130854245,109226645,134242304,100671488,2048,2048,0,0,2048,0,126,1922,318,0,22611916,7607977.365,11534336,12586113,1019874.721927,0,1048832,0

+dense_slow,copy_no_pool,0,ok,copy,False,8388608,90560,8350112,8350112,125,28753920,130227024,112627422,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1363,0,17672583,7496902.226,12582912,12386151,1006822.239807,0,0,0

+dense_slow,borrow,0,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,132968553,110199520,134242304,100671488,2048,2048,0,0,2048,0,126,1922,230,0,24087338,7516016.308,16777216,17649580,1007870.242312,0,1048832,0

+dense_slow,pressure,0,ok,pressure,True,8388608,90560,8350112,8350112,126,28753920,139106888,110625767,134242304,100671488,2048,2048,0,0,2048,0,126,1922,217,0,29387892,8069611.928,16777216,17083878,1081569.371059,0,1048832,0

+dense_slow,copy,0,ok,copy,True,8388608,90560,8350112,8350112,125,28753920,139677276,98850013,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1911,0,41099434,8122260.495,11534336,11425690,1090782.263887,0,1048832,0

+dense_slow,threshold4,0,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,152388963,133280290,134242304,100671488,2048,2048,0,0,2048,0,126,1922,263,0,19097885,8858624.865,13631488,13575925,1188061.088853,0,1048832,0

+dense_slow,threshold8,0,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,158487631,104607294,134242304,100671488,2048,2048,0,0,2048,0,126,1922,881,0,55726830,9142910.493,16777216,16508139,1223330.140557,0,1048832,0

+dense_slow,pressure,1,ok,pressure,True,8388608,90560,8350112,8350112,126,28753920,148054808,118930635,134242304,100671488,2048,2048,0,0,2048,0,126,1922,243,0,23339314,8545660.143,12582912,13488795,1145837.182993,0,1048832,0

+dense_slow,threshold2,1,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,127102070,98389110,134242304,100671488,2048,2048,0,0,2048,0,126,1922,548,0,29835471,7376714.273,11534336,11721430,988062.578411,0,1048832,0

+dense_slow,threshold4,1,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,137097783,105658521,134242304,100671488,2048,2048,0,0,2048,0,126,1922,319,0,33507567,7492151.426,25165824,25521632,1004322.345588,0,1048832,0

+dense_slow,copy_no_pool,1,ok,copy,False,8388608,90560,8350112,8350112,125,28753920,129205398,106642340,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1837,0,23366005,7161052.395,20971520,19672000,961708.896247,0,0,0

+dense_slow,threshold8,1,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,149831970,119769747,134242304,100671488,2048,2048,0,0,2048,0,126,1922,207,0,22835752,8570181.832,25165824,24456487,1149620.580849,0,1048832,0

+dense_slow,project,1,ok,project,True,8388608,90560,8350112,8350112,126,28753920,138012595,104050639,134242304,100671488,2048,2048,0,0,0,0,126,1922,573,0,35587895,8024328.08,11534336,11967226,1074555.345603,0,1048832,0

+dense_slow,copy,1,ok,copy,True,8388608,90560,8350112,8350112,125,28753920,139897423,116916607,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1245,0,21827476,7467830.775,11534336,12057799,1002967.933698,0,1048832,0

+dense_slow,borrow,1,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,124760040,105059769,134242304,100671488,2048,2048,0,0,2048,0,126,1922,279,0,20851427,7121146.062,13631488,13454333,954812.49966,0,1048832,0

+dense_slow,threshold4,2,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,128197678,100339777,134242304,100671488,2048,2048,0,0,2048,0,126,1922,483,0,29286062,7442559.441,11534336,11489301,997040.290853,0,1048832,0

+dense_slow,copy_no_pool,2,ok,copy,False,8388608,90560,8350112,8350112,125,28753920,205943127,116032671,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1454,0,23092169,12031760.945,20971520,20696239,1615356.534078,0,0,0

+dense_slow,threshold2,2,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,126630183,111840417,134242304,100671488,2048,2048,0,0,2048,0,126,1922,123,0,14544050,7317376.727,11534336,11766189,981675.539219,0,1048832,0

+dense_slow,threshold8,2,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,130400357,115426208,134242304,100671488,2048,2048,0,0,2048,0,126,1922,33,0,15522516,7311488.307,13631488,16432805,981225.27374,0,1048832,0

+dense_slow,project,2,ok,project,True,8388608,90560,8350112,8350112,126,28753920,158617537,105530265,134242304,100671488,2048,2048,0,0,0,0,126,1922,630,0,53505513,8986415.696,20971520,20150036,1202933.657783,0,1048832,0

+dense_slow,copy,2,ok,copy,True,8388608,90560,8350112,8350112,125,28753920,136167489,109997334,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1562,0,27532835,7639923.617,13631488,16520028,1026043.651851,0,1048832,0

+dense_slow,pressure,2,ok,pressure,True,8388608,90560,8350112,8350112,126,28753920,124401411,111783663,134242304,100671488,2048,2048,0,0,2048,0,126,1922,108,0,12978960,7175143.561,11534336,11871096,962716.975355,0,1048832,0

+dense_slow,borrow,2,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,140192626,129302907,134242304,100671488,2048,2048,0,0,2048,0,126,1922,32,0,11304553,8151791.4,12582912,11985985,1094054.601176,0,1048832,0

+dense_slow,threshold4,3,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,127500625,109051339,134242304,100671488,2048,2048,0,0,2048,0,126,1922,86,0,15655621,7370372.812,13631488,13648518,988934.033123,0,1048832,0

+dense_slow,copy,3,ok,copy,True,8388608,90560,8350112,8350112,125,28753920,139629443,112148433,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1923,0,28146396,7999954.838,16777216,16468658,1074362.142096,0,1048832,0

+dense_slow,threshold8,3,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,129397045,108222327,134242304,100671488,2048,2048,0,0,2048,0,126,1922,210,0,19281611,7449478.358,13631488,13544240,999089.777214,0,1048832,0

+dense_slow,copy_no_pool,3,ok,copy,False,8388608,90560,8350112,8350112,125,28753920,125060409,101408203,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1720,0,24842157,7224036.272,11534336,11678097,970120.753206,0,0,0

+dense_slow,threshold2,3,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,121944973,98926473,134242304,100671488,2048,2048,0,0,2048,0,126,1922,410,0,24262193,7027416.376,11534336,12229040,941745.792822,0,1048832,0

+dense_slow,project,3,ok,project,True,8388608,90560,8350112,8350112,126,28753920,140664495,101124724,134242304,100671488,2048,2048,0,0,0,0,126,1922,716,0,41804911,8134234.887,12582912,13075389,1088709.015188,0,1048832,0

+dense_slow,pressure,3,ok,pressure,True,8388608,90560,8350112,8350112,126,28753920,121667696,101165480,134242304,100671488,2048,2048,0,0,2048,0,126,1922,330,0,21242064,7047783.954,11534336,11408672,944768.902586,0,1048832,0

+dense_slow,borrow,3,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,122887693,108048811,134242304,100671488,2048,2048,0,0,2048,0,126,1922,100,0,15309844,6960585.889,14680064,14962365,933965.439249,0,1048832,0

+dense_slow,threshold8,4,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,127832493,107011535,134242304,100671488,2048,2048,0,0,2048,0,126,1922,312,0,21568032,7387611.189,12582912,12693631,990437.837956,0,1048832,0

+dense_slow,copy,4,ok,copy,True,8388608,90560,8350112,8350112,125,28753920,132323981,104579167,134242304,100671488,2048,2048,100663296,2048,0,0,126,3970,1868,0,28280826,7629563.252,11534336,12006726,1024670.67878,0,1048832,0

+dense_slow,threshold4,4,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,117467153,100913544,134242304,100671488,2048,2048,0,0,2048,0,126,1922,211,0,17302742,6773721.904,11534336,11750486,908428.389283,0,1048832,0

+dense_slow,project,4,ok,project,True,8388608,90560,8350112,8350112,126,28753920,177547354,98087776,134242304,100671488,2048,2048,0,0,0,0,126,1922,1077,0,66269238,10478829.253,27262976,26359796,1401395.334755,0,1048832,0

+dense_slow,copy_no_pool,4,ok,copy,False,8388608,90560,8350112,8350112,125,28753920,127352551,95896509,134242304,100671488,2048,2048,100663296,2048,0,0,4096,0,1854,0,33140024,7371263.893,11534336,11482598,989890.745684,0,0,0

+dense_slow,borrow,4,ok,borrow,True,8388608,90560,8350112,8350112,126,28753920,156176896,135527318,134242304,100671488,2048,2048,0,0,2048,0,126,1922,8,0,19302646,8983882.317,23068672,21705495,1205798.201258,0,1048832,0

+dense_slow,threshold2,4,ok,threshold,True,8388608,90560,8350112,8350112,126,28753920,150967021,112103512,134242304,100671488,2048,2048,0,0,2048,0,126,1922,343,0,27798231,8607200.207,14680064,15553678,1153842.867633,0,1048832,0

+dense_slow,pressure,4,ok,pressure,True,8388608,90560,8350112,8350112,126,28753920,131031651,108678412,134242304,100671488,2048,2048,0,0,2048,0,126,1922,194,0,17318187,7550902.647,12582912,12787335,1012712.39438,0,1048832,0

+mixed_slow,copy_no_pool,0,ok,copy,False,8388608,90560,8388432,8388432,349,28753920,196227931,90207409,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,899,0,106212702,25497204.119,41943040,38861965,1403800.480768,0,0,0

+mixed_slow,threshold4,0,ok,threshold,True,8388608,90560,8388608,8388608,282,28753920,182099749,86444975,177631232,53735632,2048,2048,11229392,1357,691,0,1834,1571,951,0,99448742,18702737.958,27262976,26735888,1347766.35285,0,1153216,0

+mixed_slow,pressure,0,ok,pressure,True,8388608,90560,8388480,8388432,345,28753920,170729984,95177478,177631232,53735632,2048,2048,27916032,1699,349,1699,1996,1751,848,0,79228418,22318118.532,33554432,33636461,1237184.456112,0,522496,0

+mixed_slow,threshold2,0,ok,threshold,True,8388608,90560,8388560,8388432,344,28753920,248649117,108815021,177631232,53735632,2048,2048,28479696,1740,308,0,1911,1877,806,0,141754620,32835308.438,50331648,52109020,1817663.170181,0,519424,0

+mixed_slow,copy,0,ok,copy,True,8388608,90560,8388576,8388432,343,28753920,188497435,95408242,177631232,53735632,2048,2048,53727440,2048,0,0,2001,2095,825,0,93045012,24119999.997,37748736,36830878,1331578.296683,0,519424,0

+mixed_slow,borrow,0,ok,borrow,True,8388608,90560,8386736,8386640,112,28753920,202207266,112741417,177631232,53735632,2048,2048,0,0,2048,0,1260,788,922,0,93158576,9030450.097,15728640,16897915,1584952.748115,0,667904,0

+mixed_slow,project,0,ok,project,True,8388608,90560,8388608,8388544,358,28753920,196788319,85794578,177631232,53735632,2048,2048,0,0,0,0,1594,454,835,0,111694672,25911259.331,41943040,39632482,1386620.278442,0,458688,0

+mixed_slow,threshold8,0,ok,threshold,True,8388608,90560,8388608,8388432,216,28753920,177004559,88488220,177631232,53735632,2048,2048,3824848,1008,1040,0,1769,1287,956,0,91999803,13961564.399,20971520,20644424,1308343.909911,0,1250624,0

+mixed_slow,copy_no_pool,1,ok,copy,False,8388608,90560,8388432,8388432,349,28753920,209526727,99009959,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,852,0,113158134,27706362.205,50331648,49857323,1504182.816335,0,0,0

+mixed_slow,threshold8,1,ok,threshold,True,8388608,90560,8388608,8388432,216,28753920,178695721,88024506,177631232,53735632,2048,2048,3824848,1008,1040,0,1752,1304,957,0,93665641,14283495.48,25165824,25314392,1350685.597943,0,1250624,0

+mixed_slow,project,1,ok,project,True,8388608,90560,8388608,8388544,358,28753920,188062454,85805781,177631232,53735632,2048,2048,0,0,0,0,1613,435,876,0,106943146,25106963.876,41943040,40388905,1338315.607594,0,463808,0

+mixed_slow,pressure,1,ok,pressure,True,8388608,90560,8388560,8388432,349,28753920,180476475,82814346,177631232,53735632,2048,2048,27916032,1699,349,1699,2034,1713,906,0,101386971,23117968.235,37748736,34624643,1287754.655314,0,522496,0

+mixed_slow,copy,1,ok,copy,True,8388608,90560,8388576,8388432,345,28753920,179916143,88224841,177631232,53735632,2048,2048,53727440,2048,0,0,2035,2061,868,0,95038979,23134688.68,37748736,38482948,1259295.778761,0,519424,0

+mixed_slow,threshold2,1,ok,threshold,True,8388608,90560,8388560,8388432,345,28753920,172458424,95876297,177631232,53735632,2048,2048,28479696,1740,308,0,1950,1838,838,0,80637955,22201893.822,29360128,29750009,1218383.798869,0,522496,0

+mixed_slow,borrow,1,ok,borrow,True,8388608,90560,8386736,8386688,112,28753920,202718412,105879101,177631232,53735632,2048,2048,0,0,2048,0,1270,778,933,0,101496664,8968645.74,15728640,15509271,1593585.502544,0,667904,0

+mixed_slow,threshold4,1,ok,threshold,True,8388608,90560,8388608,8388608,268,28753920,178050667,95042355,177631232,53735632,2048,2048,11229392,1357,691,0,1767,1638,919,0,87305079,17737601.933,27262976,26498834,1276748.071158,0,1154176,0

+mixed_slow,copy,2,ok,copy,True,8388608,90560,8388560,8388432,343,28753920,166505070,87773371,177631232,53735632,2048,2048,53727440,2048,0,0,2029,2067,855,0,82039937,21365903.831,31457280,30499822,1169734.902412,0,522496,0

+mixed_slow,project,2,ok,project,True,8388608,90560,8388576,8388576,358,28753920,184834889,77869217,177631232,53735632,2048,2048,0,0,0,0,1654,394,900,0,108638540,24466594.426,46137344,45971408,1295645.073976,0,458688,0

+mixed_slow,threshold2,2,ok,threshold,True,8388608,90560,8388432,8388432,346,28753920,191170037,94174606,177631232,53735632,2048,2048,28479696,1740,308,0,1933,1855,839,0,99297240,24916604.797,37748736,37194081,1364006.158543,0,519424,0

+mixed_slow,threshold4,2,ok,threshold,True,8388608,90560,8388608,8388608,267,28753920,221114880,108320175,177631232,53735632,2048,2048,11229392,1357,691,0,1725,1680,867,0,112272606,22302398.136,31457280,31418968,1620151.723755,0,1153216,0

+mixed_slow,pressure,2,ok,pressure,True,8388608,90560,8388560,8388432,343,28753920,200423808,95868665,177631232,53735632,2048,2048,27916032,1699,349,1699,1950,1797,826,0,104684245,26149827.952,37748736,37286562,1462564.435239,0,519424,0

+mixed_slow,copy_no_pool,2,ok,copy,False,8388608,90560,8388432,8388432,348,28753920,185563183,99669005,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,824,0,88520259,24158310.672,37748736,37578913,1315287.672243,0,0,0

+mixed_slow,threshold8,2,ok,threshold,True,8388608,90560,8388576,8388352,216,28753920,285706068,123773735,177631232,53735632,2048,2048,3824848,1008,1040,0,1639,1417,811,0,151915315,22809999.729,41943040,39308704,2141933.275175,0,1250624,0

+mixed_slow,borrow,2,ok,borrow,True,8388608,90560,8386736,8386640,112,28753920,277725554,130508378,177631232,53735632,2048,2048,0,0,2048,0,1246,802,882,0,145190817,12364716.181,25165824,24717468,2188978.814479,0,667904,0

+mixed_slow,project,3,ok,project,True,8388608,90560,8388576,8388544,350,28753920,266408067,111663429,177631232,53735632,2048,2048,0,0,0,0,1498,550,732,0,138942208,34638344.422,54525952,52949259,1878408.17389,0,458688,0

+mixed_slow,threshold2,3,ok,threshold,True,8388608,90560,8388560,8388432,341,28753920,204623815,104506177,177631232,53735632,2048,2048,28479696,1740,308,0,1822,1966,758,0,97171540,25691162.972,41943040,40286443,1429280.943963,0,522496,0

+mixed_slow,threshold4,3,ok,threshold,True,8388608,90560,8388608,8388608,277,28753920,162195656,80564634,177631232,53735632,2048,2048,11229392,1357,691,0,1810,1595,983,0,84519072,16670151.746,23068672,21537625,1200241.584576,0,1153216,0

+mixed_slow,copy,3,ok,copy,True,8388608,90560,8388560,8388432,350,28753920,155808970,73686530,177631232,53735632,2048,2048,53727440,2048,0,0,2181,1915,970,0,84997837,20210703.898,29360128,29034418,1105823.092919,0,522496,0

+mixed_slow,copy_no_pool,3,ok,copy,False,8388608,90560,8388432,8388432,343,28753920,175012120,86574113,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,847,0,86153992,21577383.531,37748736,35170512,1189109.090661,0,0,0

+mixed_slow,borrow,3,ok,borrow,True,8388608,90560,8386736,8386640,112,28753920,192464571,109214745,177631232,53735632,2048,2048,0,0,2048,0,1270,778,921,0,85288420,8548822.691,13631488,14178942,1513389.1547,0,667904,0

+mixed_slow,threshold8,3,ok,threshold,True,8388608,90560,8388496,8388432,216,28753920,180744548,92447570,177631232,53735632,2048,2048,3824848,1008,1040,0,1772,1284,987,0,91033265,14634490.266,20971520,21334847,1375000.84592,0,1250624,0

+mixed_slow,pressure,3,ok,pressure,True,8388608,90560,8388480,8388432,347,28753920,190539057,89751173,177631232,53735632,2048,2048,27916032,1699,349,1699,1983,1764,862,0,102577548,24120880.139,46137344,43388027,1333423.649457,0,519424,0

+mixed_slow,copy,4,ok,copy,True,8388608,90560,8388432,8388432,339,28753920,221349934,109576369,177631232,53735632,2048,2048,53727440,2048,0,0,1871,2225,733,0,114046592,28163326.597,46137344,46133518,1540447.287587,0,519424,0

+mixed_slow,project,4,ok,project,True,8388608,90560,8388576,8388544,351,28753920,182031656,81559603,177631232,53735632,2048,2048,0,0,0,0,1543,505,829,0,98044537,23787174.92,33554432,33075333,1288001.912824,0,458688,0

+mixed_slow,threshold8,4,ok,threshold,True,8388608,90560,8388608,8388432,216,28753920,190119929,98659849,177631232,53735632,2048,2048,3824848,1008,1040,0,1748,1308,937,0,91519644,15332315.134,27262976,28453087,1432190.421467,0,1262912,0

+mixed_slow,copy_no_pool,4,ok,copy,False,8388608,90560,8388432,8388432,348,28753920,181246528,87821814,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,854,0,96465580,23009953.597,37748736,35350753,1263667.037898,0,0,0

+mixed_slow,threshold4,4,ok,threshold,True,8388608,90560,8388608,8388608,268,28753920,202902060,94178139,177631232,53735632,2048,2048,11229392,1357,691,0,1778,1627,948,0,111627333,20292318.825,41943040,42672491,1456891.057432,0,1153216,0

+mixed_slow,borrow,4,ok,borrow,True,8388608,90560,8386736,8386640,112,28753920,187355085,105102970,177631232,53735632,2048,2048,0,0,2048,0,1268,780,942,0,86194520,8306217.014,16777216,16560027,1467132.987688,0,667904,0

+mixed_slow,threshold2,4,ok,threshold,True,8388608,90560,8388560,8388432,349,28753920,185932830,88442274,177631232,53735632,2048,2048,28479696,1740,308,0,1998,1790,873,0,100159229,24415772.17,37748736,35463160,1333943.667435,0,519424,0

+mixed_slow,pressure,4,ok,pressure,True,8388608,90560,8388560,8388432,351,28753920,175115990,85590028,177631232,53735632,2048,2048,27916032,1699,349,1699,2029,1718,897,0,90980114,22901875.606,31457280,30636340,1271349.314418,0,519424,0

+mixed_tight,pressure,0,ok,pressure,True,2097152,90560,2097152,2097136,106,28753920,194998211,80964449,177631232,53735632,2048,2048,28385168,1727,321,1727,2265,1510,1251,0,117554960,6209271.27,9437184,9610047,352937.551048,0,523712,0

+mixed_tight,project,0,ok,project,True,2097152,90560,2097120,2097120,118,28753920,191006927,80024226,177631232,53735632,2048,2048,0,0,0,0,1659,389,1164,0,113283506,6749781.49,10485760,10754747,354343.266259,0,406848,0

+mixed_tight,threshold8,0,ok,threshold,True,2097152,90560,2097120,2097120,72,28753920,315263040,90750328,177631232,53735632,2048,2048,3824848,1008,1040,0,1890,1166,1248,0,228816753,6291155.426,13631488,13216574,579371.042178,0,386176,0

+mixed_tight,copy_no_pool,0,ok,copy,False,2097152,90560,2097136,2097136,116,28753920,215534802,92135979,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1179,0,127073694,6714221.641,10485760,12545668,387556.898349,0,0,0

+mixed_tight,threshold4,0,ok,threshold,True,2097152,90560,2097136,2097104,91,28753920,240539157,82888986,177631232,53735632,2048,2048,11229392,1357,691,0,2037,1368,1333,0,157978818,6115847.212,9437184,11204691,437508.612236,0,435392,0

+mixed_tight,copy,0,ok,copy,True,2097152,90560,2097136,2097136,111,28753920,205803459,87522857,177631232,53735632,2048,2048,53727440,2048,0,0,2361,1735,1210,0,121961836,6356735.332,11534336,12149188,363428.263552,0,523712,0

+mixed_tight,threshold2,0,ok,threshold,True,2097152,90560,2097136,2097136,103,28753920,218109869,94383237,177631232,53735632,2048,2048,28479696,1740,308,0,2188,1600,1166,0,128480946,7013746.965,14680064,15108236,394831.364885,0,523712,0

+mixed_tight,borrow,0,ok,borrow,True,2097152,90560,2094128,2094032,40,28753920,544543692,90900399,177631232,53735632,2048,2048,0,0,2048,0,1332,716,1286,0,453134113,6077465.417,11534336,12176243,1028555.825239,0,495872,0

+mixed_tight,copy,1,ok,copy,True,2097152,90560,2097136,2097136,117,28753920,191836517,62332245,177631232,53735632,2048,2048,53727440,2048,0,0,2460,1636,1362,0,131898458,6069082.115,8388608,8770216,346911.480275,0,523712,0

+mixed_tight,threshold2,1,ok,threshold,True,2097152,90560,2097136,2097136,117,28753920,188885136,63904326,177631232,53735632,2048,2048,28479696,1740,308,0,2356,1432,1390,0,127844964,6121880.805,8388608,8708698,342822.067006,0,523712,0

+mixed_tight,borrow,1,ok,borrow,True,2097152,90560,2094128,2094128,40,28753920,492789763,76140523,177631232,53735632,2048,2048,0,0,2048,0,1347,701,1406,0,420428963,5485700.477,8388608,9955175,928718.610429,0,495872,0

+mixed_tight,threshold8,1,ok,threshold,True,2097152,90560,2097136,2097136,72,28753920,282084485,66066433,177631232,53735632,2048,2048,3824848,1008,1040,0,1992,1064,1398,0,219096863,5671193.431,7340032,9274955,520410.956771,0,386176,0

+mixed_tight,threshold4,1,ok,threshold,True,2097152,90560,2097136,2097104,88,28753920,224500368,61534673,177631232,53735632,2048,2048,11229392,1357,691,0,2145,1260,1465,0,165914339,5837746.733,7864320,10210564,412262.960044,0,435392,0

+mixed_tight,pressure,1,ok,pressure,True,2097152,90560,2097136,2097136,115,28753920,189684559,60774942,177631232,53735632,2048,2048,28385168,1727,321,1727,2383,1392,1399,0,131755127,6110993.322,8388608,9608714,345607.344111,0,523712,0

+mixed_tight,copy_no_pool,1,ok,copy,False,2097152,90560,2097136,2097136,117,28753920,190441538,59274120,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1383,0,133844636,6031707.432,8388608,8881216,344699.365648,0,0,0

+mixed_tight,project,1,ok,project,True,2097152,90560,2097120,2097120,118,28753920,175373266,57346839,177631232,53735632,2048,2048,0,0,0,0,1727,321,1312,0,120854151,6287663.374,8388608,8829253,326669.995028,0,406848,0

+mixed_tight,copy_no_pool,2,ok,copy,False,2097152,90560,2097136,2097136,115,28753920,190230224,58883103,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1379,0,133923360,6020977.936,8388608,8904123,344486.353015,0,0,0

+mixed_tight,project,2,ok,project,True,2097152,90560,2097120,2097120,118,28753920,176712466,57142470,177631232,53735632,2048,2048,0,0,0,0,1727,321,1308,0,122435178,6344282.023,9437184,9173733,329327.109037,0,406848,0

+mixed_tight,copy,2,ok,copy,True,2097152,90560,2097152,2097136,115,28753920,192640551,62036091,177631232,53735632,2048,2048,53727440,2048,0,0,2463,1633,1367,0,133360267,6075663.601,8388608,8830642,347845.920578,0,523712,0

+mixed_tight,threshold8,2,ok,threshold,True,2097152,90560,2097136,2097136,73,28753920,284454034,68644342,177631232,53735632,2048,2048,3824848,1008,1040,0,1983,1073,1386,0,218577789,5702048.39,7340032,9254474,523314.413618,0,386176,0

+mixed_tight,threshold4,2,ok,threshold,True,2097152,90560,2097136,2097104,88,28753920,226008956,64169718,177631232,53735632,2048,2048,11229392,1357,691,0,2125,1280,1458,0,164889565,5866464.096,8388608,10318805,414911.228869,0,435392,0

+mixed_tight,borrow,2,ok,borrow,True,2097152,90560,2094128,2094128,40,28753920,494360387,73512176,177631232,53735632,2048,2048,0,0,2048,0,1345,703,1395,0,424305645,5500812.732,8388608,9972009,932412.777581,0,495872,0

+mixed_tight,threshold2,2,ok,threshold,True,2097152,90560,2097136,2097136,115,28753920,188224878,60744558,177631232,53735632,2048,2048,28479696,1740,308,0,2384,1404,1411,0,130279846,6114092.392,8388608,8874864,342235.388035,0,523712,0

+mixed_tight,pressure,2,ok,pressure,True,2097152,90560,2097136,2097136,115,28753920,189816540,60109883,177631232,53735632,2048,2048,28385168,1727,321,1727,2377,1398,1401,0,132388467,6115537.712,8388608,9634918,345575.615482,0,523712,0

+mixed_tight,pressure,3,ok,pressure,True,2097152,90560,2097136,2097136,115,28753920,190593723,62104383,177631232,53735632,2048,2048,28385168,1727,321,1727,2377,1398,1387,0,131246281,6133228.412,8388608,9617713,346774.138471,0,523712,0

+mixed_tight,borrow,3,ok,borrow,True,2097152,90560,2094128,2094128,40,28753920,491528840,70906509,177631232,53735632,2048,2048,0,0,2048,0,1353,695,1421,0,423844868,5472000.565,8388608,9945028,926418.118409,0,495872,0

+mixed_tight,copy_no_pool,3,ok,copy,False,2097152,90560,2097136,2097136,116,28753920,190661223,60180004,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1376,0,133160918,6036141.159,8388608,8916068,345094.680154,0,0,0

+mixed_tight,threshold2,3,ok,threshold,True,2097152,90560,2097136,2097136,116,28753920,193175809,69008296,177631232,53735632,2048,2048,28479696,1740,308,0,2336,1452,1351,0,125127054,6239198.13,9437184,9276566,350903.059901,0,523712,0

+mixed_tight,threshold8,3,ok,threshold,True,2097152,90560,2097120,2097120,73,28753920,286766304,73096130,177631232,53735632,2048,2048,3824848,1008,1040,0,1974,1082,1367,0,215532386,5744366.208,7864320,8864197,528100.049771,0,386176,0

+mixed_tight,threshold4,3,ok,threshold,True,2097152,90560,2097136,2097104,88,28753920,225938124,65488664,177631232,53735632,2048,2048,11229392,1357,691,0,2121,1284,1445,0,163452164,5856203.824,8388608,10380804,414648.202609,0,435392,0

+mixed_tight,copy,3,ok,copy,True,2097152,90560,2097152,2097136,108,28753920,191114147,63369902,177631232,53735632,2048,2048,53727440,2048,0,0,2453,1643,1341,0,130459979,6032302.559,8388608,8833531,345755.184019,0,523712,0

+mixed_tight,project,3,ok,project,True,2097152,90560,2097120,2097120,118,28753920,177942277,63483663,177631232,53735632,2048,2048,0,0,0,0,1711,337,1279,0,117556310,6348716.251,8388608,8883105,331194.459386,0,406848,0

+mixed_tight,copy,4,ok,copy,True,2097152,90560,2097152,2097136,117,28753920,191747145,60306782,177631232,53735632,2048,2048,53727440,2048,0,0,2470,1626,1379,0,134097654,6065392.323,8388608,8895161,347142.858576,0,523712,0

+mixed_tight,threshold2,4,ok,threshold,True,2097152,90560,2097136,2097136,115,28753920,187864582,60112693,177631232,53735632,2048,2048,28479696,1740,308,0,2380,1408,1409,0,130504092,6102214.292,8388608,8884715,341567.414808,0,523712,0

+mixed_tight,project,4,ok,project,True,2097152,90560,2097120,2097120,118,28753920,175293210,56768485,177631232,53735632,2048,2048,0,0,0,0,1722,326,1313,0,121359184,6283898.527,8388608,8849623,326483.546647,0,406848,0

+mixed_tight,threshold8,4,ok,threshold,True,2097152,90560,2097136,2097136,73,28753920,283727960,68131361,177631232,53735632,2048,2048,3824848,1008,1040,0,1988,1068,1394,0,218912386,5707951.51,7340032,9272677,523909.294385,0,386176,0

+mixed_tight,borrow,4,ok,borrow,True,2097152,90560,2094128,2094128,40,28753920,495666215,81002646,177631232,53735632,2048,2048,0,0,2048,0,1336,712,1382,0,418460319,5519510.972,8388608,9930268,935139.458784,0,495872,0

+mixed_tight,copy_no_pool,4,ok,copy,False,2097152,90560,2097136,2097136,116,28753920,190841888,60356559,177631232,53735632,2048,2048,53727440,2048,0,0,4096,0,1382,0,133224289,6038284.196,8388608,8947753,345496.101548,0,0,0

+mixed_tight,threshold4,4,ok,threshold,True,2097152,90560,2097136,2097104,88,28753920,226098419,63538828,177631232,53735632,2048,2048,11229392,1357,691,0,2129,1276,1452,0,165691682,5878789.657,7864320,10264360,415107.899759,0,435392,0

+mixed_tight,pressure,4,ok,pressure,True,2097152,90560,2097136,2097136,115,28753920,192204126,62496629,177631232,53735632,2048,2048,28385168,1727,321,1727,2367,1408,1381,0,132616450,6161110.138,9437184,9782879,349554.881495,0,523712,0

+sparse_fast,pressure,0,ok,pressure,True,8388608,90560,156112,156112,1,28753920,20554720,20527722,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9881.978,13312,60759,1273.955005,0,65552,0

+sparse_fast,project,0,ok,project,True,8388608,90560,90640,90640,1,28753920,22216122,22101834,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10698.669,16384,58241,1.68633,0,80,0

+sparse_fast,threshold4,0,ok,threshold,True,8388608,90560,156192,156192,1,28753920,22839176,22457056,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10958.209,20480,165851,1227.172318,0,65632,0

+sparse_fast,copy,0,ok,copy,True,8388608,90560,156192,156192,1,28753920,21009107,20955370,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10112.231,14336,66129,1120.781895,0,65632,0

+sparse_fast,copy_no_pool,0,ok,copy,False,8388608,90560,156192,156192,1,28753920,21132162,21048817,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,10163.675,16384,68685,1121.783606,0,0,0

+sparse_fast,threshold8,0,ok,threshold,True,8388608,90560,156192,156192,1,28753920,20540535,20499501,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9884.486,13312,54093,1100.863361,0,65632,0

+sparse_fast,borrow,0,ok,borrow,True,8388608,90560,156112,156112,1,28753920,21727605,21682906,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,10449.435,20480,65999,1348.749968,0,65552,0

+sparse_fast,threshold2,0,ok,threshold,True,8388608,90560,156192,156192,1,28753920,22373067,22308741,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10776.724,18432,66703,1207.809872,0,65632,0

+sparse_fast,project,1,ok,project,True,8388608,90560,90640,90640,1,28753920,25768428,25607575,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,12427.336,22528,135518,1.971383,0,80,0

+sparse_fast,threshold8,1,ok,threshold,True,8388608,90560,156192,156192,1,28753920,22601085,22218814,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10886.611,28672,70518,1220.513584,0,65632,0

+sparse_fast,copy_no_pool,1,ok,copy,False,8388608,90560,156192,156192,1,28753920,22194827,21633689,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,10673.54,36864,207444,1178.059751,0,0,0

+sparse_fast,pressure,1,ok,pressure,True,8388608,90560,156112,156112,1,28753920,23241749,23003312,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,11135.177,22528,79185,1441.524009,0,65552,0

+sparse_fast,copy,1,ok,copy,True,8388608,90560,156192,156192,1,28753920,24103618,23832019,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,11617.114,22528,88389,1310.460688,0,65632,0

+sparse_fast,threshold2,1,ok,threshold,True,8388608,90560,156192,156192,1,28753920,21191681,21131537,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10199.927,14336,68426,1132.085862,0,65632,0

+sparse_fast,threshold4,1,ok,threshold,True,8388608,90560,156192,156192,1,28753920,21871975,21613127,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10530.066,18432,78704,1171.334175,0,65632,0

+sparse_fast,borrow,1,ok,borrow,True,8388608,90560,156112,156112,1,28753920,21555643,21467723,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,10366.948,18432,62648,1339.691796,0,65552,0

+sparse_fast,borrow,2,ok,borrow,True,8388608,90560,156112,156112,1,28753920,20704016,20633572,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9954.482,14336,84963,1283.092823,0,65552,0

+sparse_fast,threshold2,2,ok,threshold,True,8388608,90560,156192,156192,1,28753920,20854404,20822149,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10030.324,14336,62445,1108.309428,0,65632,0

+sparse_fast,copy_no_pool,2,ok,copy,False,8388608,90560,156192,156192,1,28753920,21286218,21228201,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,10237.021,15360,67889,1129.223222,0,0,0

+sparse_fast,project,2,ok,project,True,8388608,90560,90640,90640,1,28753920,22649251,22567445,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10910.76,15360,61499,1.717551,0,80,0

+sparse_fast,pressure,2,ok,pressure,True,8388608,90560,156112,156112,1,28753920,20767942,20708872,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9985.038,15360,65425,1286.595987,0,65552,0

+sparse_fast,copy,2,ok,copy,True,8388608,90560,156192,156192,1,28753920,21065681,21006279,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10139.793,15360,67018,1124.320165,0,65632,0

+sparse_fast,threshold4,2,ok,threshold,True,8388608,90560,156192,156192,1,28753920,20961885,20931648,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10087.398,13312,60962,1117.500277,0,65632,0

+sparse_fast,threshold8,2,ok,threshold,True,8388608,90560,156192,156192,1,28753920,20908700,20878832,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10062.625,14336,70648,1116.46627,0,65632,0

+sparse_fast,threshold2,3,ok,threshold,True,8388608,90560,156192,156192,1,28753920,21328570,21275351,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,10266.949,15360,61241,1144.526904,0,65632,0

+sparse_fast,borrow,3,ok,borrow,True,8388608,90560,156112,156112,1,28753920,20408294,20408999,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,9812.079,13312,48982,1265.057763,0,65552,0

+sparse_fast,copy,3,ok,copy,True,8388608,90560,156192,156192,1,28753920,20744256,20744722,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,9979.793,13312,42518,1107.901257,0,65632,0

+sparse_fast,project,3,ok,project,True,8388608,90560,90640,90640,1,28753920,21766957,21732111,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10483.601,13312,74593,1.653919,0,80,0

+sparse_fast,threshold4,3,ok,threshold,True,8388608,90560,156192,156192,1,28753920,23474730,23418353,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,11311.146,24576,72445,1275.148887,0,65632,0

+sparse_fast,threshold8,3,ok,threshold,True,8388608,90560,156192,156192,1,28753920,25891223,25855036,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,12490.423,32768,62019,1433.084986,0,65632,0

+sparse_fast,pressure,3,ok,pressure,True,8388608,90560,156112,156112,1,28753920,25124448,24854663,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,12097.683,24576,83351,1569.932052,0,65552,0

+sparse_fast,copy_no_pool,3,ok,copy,False,8388608,90560,156192,156192,1,28753920,21725958,21582704,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,10452.028,16384,197777,1159.292471,0,0,0

+sparse_fast,project,4,ok,project,True,8388608,90560,90640,90640,1,28753920,22202622,22202889,134242304,139264,2048,2048,0,0,0,0,1,2047,0,0,0,10695.292,18432,48444,1.688434,0,80,0

+sparse_fast,threshold2,4,ok,threshold,True,8388608,90560,156192,156192,1,28753920,27294793,27138353,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,13171.363,28672,78185,1515.562825,0,65632,0

+sparse_fast,threshold8,4,ok,threshold,True,8388608,90560,156192,156192,1,28753920,33207148,33180296,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,16048.501,36864,74648,1873.802277,0,65632,0

+sparse_fast,copy,4,ok,copy,True,8388608,90560,156192,156192,1,28753920,40643311,40589351,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,19667.254,49152,147388,2334.403772,0,65632,0

+sparse_fast,threshold4,4,ok,threshold,True,8388608,90560,156192,156192,1,28753920,28395383,28350296,134242304,139264,2048,2048,131072,2048,0,0,2,4094,0,0,0,13707.471,26624,87370,1583.182193,0,65632,0

+sparse_fast,borrow,4,ok,borrow,True,8388608,90560,156112,156112,1,28753920,25754576,25674260,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,12408.192,20480,98925,1611.048102,0,65552,0

+sparse_fast,pressure,4,ok,pressure,True,8388608,90560,156112,156112,1,28753920,28270087,28259741,134242304,139264,2048,2048,0,0,2048,0,1,2047,0,0,0,13635.652,20480,75407,1772.014643,0,65552,0

+sparse_fast,copy_no_pool,4,ok,copy,False,8388608,90560,156192,156192,1,28753920,30675302,30605147,134242304,139264,2048,2048,131072,2048,0,0,4096,0,0,0,0,14792.559,22528,144222,1690.623657,0,0,0

diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.json
new file mode 100644
index 0000000..78400eb
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/raw.json
@@ -0,0 +1,7202 @@
+[
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 156440711,
+    "cpu_ns": 48121065,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 878,
+    "sleep_ns": 109587045,
+    "latency_mean_ns": 32718961.288,
+    "latency_p99_upper_ns": 50331648,
+    "latency_max_ns": 47686700,
+    "active_byte_seconds": 7879.414446,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 152733814,
+    "cpu_ns": 52980104,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 718,
+    "sleep_ns": 102189918,
+    "latency_mean_ns": 30324683.181,
+    "latency_p99_upper_ns": 54525952,
+    "latency_max_ns": 52327335,
+    "active_byte_seconds": 7602.229051,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 155247640,
+    "cpu_ns": 47779812,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 809,
+    "sleep_ns": 108519282,
+    "latency_mean_ns": 31414916.006,
+    "latency_p99_upper_ns": 54525952,
+    "latency_max_ns": 51100228,
+    "active_byte_seconds": 7369.340036,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 164046264,
+    "cpu_ns": 46944898,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 881,
+    "sleep_ns": 113764083,
+    "latency_mean_ns": 35133900.267,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 46051556,
+    "active_byte_seconds": 8459.440246,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 157789596,
+    "cpu_ns": 25739163,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 136058109,
+    "latency_mean_ns": 34150955.425,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40528961,
+    "active_byte_seconds": 5595.217111,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154250903,
+    "cpu_ns": 24028565,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133827808,
+    "latency_mean_ns": 33265597.392,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37531339,
+    "active_byte_seconds": 6504.707846,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 101576920,
+    "cpu_ns": 50248602,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 825,
+    "slot_waits": 0,
+    "sleep_ns": 53200392,
+    "latency_mean_ns": 5868549.98,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 10885229,
+    "active_byte_seconds": 784884.708981,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4316448,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 153086035,
+    "cpu_ns": 29353156,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113152,
+    "copied_records": 1768,
+    "borrowed_records": 280,
+    "pressure_copies": 1768,
+    "allocations": 514,
+    "reuses": 3302,
+    "budget_waits": 0,
+    "slot_waits": 1424,
+    "sleep_ns": 127637166,
+    "latency_mean_ns": 32763957.697,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38592411,
+    "active_byte_seconds": 549197.237404,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 132106520,
+    "cpu_ns": 45409725,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1532,
+    "slot_waits": 0,
+    "sleep_ns": 89610425,
+    "latency_mean_ns": 7801228.044,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9303567,
+    "active_byte_seconds": 1041796.843202,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154376717,
+    "cpu_ns": 24625261,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 133550825,
+    "latency_mean_ns": 33304515.117,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37563136,
+    "active_byte_seconds": 6521.304714,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154790882,
+    "cpu_ns": 24092354,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134531052,
+    "latency_mean_ns": 33433846.048,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37877431,
+    "active_byte_seconds": 6519.648368,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154495679,
+    "cpu_ns": 24603184,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 133731727,
+    "latency_mean_ns": 33331969.71,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37527099,
+    "active_byte_seconds": 6535.057316,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154242976,
+    "cpu_ns": 24135969,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1535,
+    "sleep_ns": 133865874,
+    "latency_mean_ns": 33299370.61,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37484173,
+    "active_byte_seconds": 6509.096995,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154024996,
+    "cpu_ns": 25025451,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 132769732,
+    "latency_mean_ns": 33212736.419,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37402803,
+    "active_byte_seconds": 5441.502377,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4316928,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 151466095,
+    "cpu_ns": 27009927,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113280,
+    "copied_records": 1770,
+    "borrowed_records": 278,
+    "pressure_copies": 1770,
+    "allocations": 514,
+    "reuses": 3304,
+    "budget_waits": 0,
+    "slot_waits": 1473,
+    "sleep_ns": 128099292,
+    "latency_mean_ns": 32391902.953,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37408099,
+    "active_byte_seconds": 539531.143577,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 155007270,
+    "cpu_ns": 24608283,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1535,
+    "sleep_ns": 134124966,
+    "latency_mean_ns": 33382726.714,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37593062,
+    "active_byte_seconds": 6546.135984,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154312902,
+    "cpu_ns": 23956224,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1535,
+    "sleep_ns": 134085359,
+    "latency_mean_ns": 33321820.453,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37660191,
+    "active_byte_seconds": 6502.811837,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154586382,
+    "cpu_ns": 24703970,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 133705501,
+    "latency_mean_ns": 33392210.559,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 37987523,
+    "active_byte_seconds": 6536.248232,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154368809,
+    "cpu_ns": 24191625,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 133926227,
+    "latency_mean_ns": 33288663.865,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37544080,
+    "active_byte_seconds": 6508.096109,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4316208,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 151522021,
+    "cpu_ns": 27174295,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113088,
+    "copied_records": 1767,
+    "borrowed_records": 281,
+    "pressure_copies": 1767,
+    "allocations": 514,
+    "reuses": 3301,
+    "budget_waits": 0,
+    "slot_waits": 1465,
+    "sleep_ns": 128053394,
+    "latency_mean_ns": 32398179.535,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37585173,
+    "active_byte_seconds": 545315.69968,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154139254,
+    "cpu_ns": 24156681,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1535,
+    "sleep_ns": 133742452,
+    "latency_mean_ns": 33274854.653,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37580636,
+    "active_byte_seconds": 6504.184345,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154504494,
+    "cpu_ns": 25538018,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1533,
+    "sleep_ns": 132803019,
+    "latency_mean_ns": 33348679.346,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37696024,
+    "active_byte_seconds": 5463.772808,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154268606,
+    "cpu_ns": 24017037,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134039266,
+    "latency_mean_ns": 33296530.878,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37600117,
+    "active_byte_seconds": 6499.765006,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 116617303,
+    "cpu_ns": 46471284,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1258,
+    "slot_waits": 0,
+    "sleep_ns": 72494973,
+    "latency_mean_ns": 6836360.134,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9280234,
+    "active_byte_seconds": 913414.105279,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 155002696,
+    "cpu_ns": 25290252,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133467827,
+    "latency_mean_ns": 33443160.686,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38061801,
+    "active_byte_seconds": 5479.253547,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 122707360,
+    "cpu_ns": 46832624,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1334,
+    "slot_waits": 0,
+    "sleep_ns": 78581274,
+    "latency_mean_ns": 7210177.487,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9450215,
+    "active_byte_seconds": 963195.592926,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4316128,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 170735523,
+    "cpu_ns": 36085789,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113024,
+    "copied_records": 1766,
+    "borrowed_records": 282,
+    "pressure_copies": 1766,
+    "allocations": 514,
+    "reuses": 3300,
+    "budget_waits": 0,
+    "slot_waits": 1403,
+    "sleep_ns": 140741412,
+    "latency_mean_ns": 37128525.741,
+    "latency_p99_upper_ns": 50331648,
+    "latency_max_ns": 49207437,
+    "active_byte_seconds": 624641.105995,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 161984455,
+    "cpu_ns": 35308455,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1418,
+    "sleep_ns": 132544941,
+    "latency_mean_ns": 34734342.366,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 41927513,
+    "active_byte_seconds": 7196.657649,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 183186784,
+    "cpu_ns": 39562601,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1377,
+    "sleep_ns": 149944607,
+    "latency_mean_ns": 39799236.839,
+    "latency_p99_upper_ns": 50331648,
+    "latency_max_ns": 49954231,
+    "active_byte_seconds": 8175.636446,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 160896124,
+    "cpu_ns": 25740442,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1519,
+    "sleep_ns": 138959714,
+    "latency_mean_ns": 34942676.828,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40635979,
+    "active_byte_seconds": 6866.098036,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 155242417,
+    "cpu_ns": 24840078,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1534,
+    "sleep_ns": 134375289,
+    "latency_mean_ns": 33387730.27,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38123912,
+    "active_byte_seconds": 6526.934401,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 153980365,
+    "cpu_ns": 24665615,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1523,
+    "sleep_ns": 133098283,
+    "latency_mean_ns": 33153737.672,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37518117,
+    "active_byte_seconds": 6514.197106,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154143199,
+    "cpu_ns": 24004931,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 133901751,
+    "latency_mean_ns": 33287028.642,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37626617,
+    "active_byte_seconds": 6483.552028,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 153170646,
+    "cpu_ns": 26299681,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1505,
+    "sleep_ns": 130663631,
+    "latency_mean_ns": 33019408.27,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37369469,
+    "active_byte_seconds": 6585.869234,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154103699,
+    "cpu_ns": 23694419,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 134088060,
+    "latency_mean_ns": 33271036.464,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37623950,
+    "active_byte_seconds": 6485.074292,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154585216,
+    "cpu_ns": 23936885,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 134389609,
+    "latency_mean_ns": 33393120.598,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 38036616,
+    "active_byte_seconds": 6515.371593,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 124475504,
+    "cpu_ns": 45943956,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1468,
+    "slot_waits": 0,
+    "sleep_ns": 81119761,
+    "latency_mean_ns": 7320646.162,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9274900,
+    "active_byte_seconds": 977840.583339,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 197072,
+    "peak_active_bytes": 197072,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154125217,
+    "cpu_ns": 24321563,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 513,
+    "reuses": 3583,
+    "budget_waits": 0,
+    "slot_waits": 1536,
+    "sleep_ns": 133545099,
+    "latency_mean_ns": 33270620.015,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37515988,
+    "active_byte_seconds": 6516.994726,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 66752,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 4321888,
+    "peak_active_bytes": 4317248,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 151398447,
+    "cpu_ns": 26713792,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 113408,
+    "copied_records": 1772,
+    "borrowed_records": 276,
+    "pressure_copies": 1772,
+    "allocations": 514,
+    "reuses": 3306,
+    "budget_waits": 0,
+    "slot_waits": 1473,
+    "sleep_ns": 128307648,
+    "latency_mean_ns": 32397554.332,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37324395,
+    "active_byte_seconds": 535707.02646,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 590528,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 131520,
+    "peak_active_bytes": 131520,
+    "peak_queue": 512,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 154766567,
+    "cpu_ns": 24892483,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 512,
+    "reuses": 1536,
+    "budget_waits": 0,
+    "slot_waits": 1537,
+    "sleep_ns": 133703008,
+    "latency_mean_ns": 33388895.003,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 37874598,
+    "active_byte_seconds": 5470.365986,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1280,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 153699255,
+    "cpu_ns": 97036844,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 890,
+    "slot_waits": 0,
+    "sleep_ns": 59162056,
+    "latency_mean_ns": 8908081.106,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 16113048,
+    "active_byte_seconds": 1191532.621299,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 130854245,
+    "cpu_ns": 109226645,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 318,
+    "slot_waits": 0,
+    "sleep_ns": 22611916,
+    "latency_mean_ns": 7607977.365,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12586113,
+    "active_byte_seconds": 1019874.721927,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 130227024,
+    "cpu_ns": 112627422,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1363,
+    "slot_waits": 0,
+    "sleep_ns": 17672583,
+    "latency_mean_ns": 7496902.226,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12386151,
+    "active_byte_seconds": 1006822.239807,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 132968553,
+    "cpu_ns": 110199520,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 230,
+    "slot_waits": 0,
+    "sleep_ns": 24087338,
+    "latency_mean_ns": 7516016.308,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 17649580,
+    "active_byte_seconds": 1007870.242312,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 139106888,
+    "cpu_ns": 110625767,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 217,
+    "slot_waits": 0,
+    "sleep_ns": 29387892,
+    "latency_mean_ns": 8069611.928,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 17083878,
+    "active_byte_seconds": 1081569.371059,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 139677276,
+    "cpu_ns": 98850013,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1911,
+    "slot_waits": 0,
+    "sleep_ns": 41099434,
+    "latency_mean_ns": 8122260.495,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11425690,
+    "active_byte_seconds": 1090782.263887,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 152388963,
+    "cpu_ns": 133280290,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 263,
+    "slot_waits": 0,
+    "sleep_ns": 19097885,
+    "latency_mean_ns": 8858624.865,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13575925,
+    "active_byte_seconds": 1188061.088853,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 158487631,
+    "cpu_ns": 104607294,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 881,
+    "slot_waits": 0,
+    "sleep_ns": 55726830,
+    "latency_mean_ns": 9142910.493,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 16508139,
+    "active_byte_seconds": 1223330.140557,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 148054808,
+    "cpu_ns": 118930635,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 243,
+    "slot_waits": 0,
+    "sleep_ns": 23339314,
+    "latency_mean_ns": 8545660.143,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13488795,
+    "active_byte_seconds": 1145837.182993,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 127102070,
+    "cpu_ns": 98389110,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 548,
+    "slot_waits": 0,
+    "sleep_ns": 29835471,
+    "latency_mean_ns": 7376714.273,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11721430,
+    "active_byte_seconds": 988062.578411,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 137097783,
+    "cpu_ns": 105658521,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 319,
+    "slot_waits": 0,
+    "sleep_ns": 33507567,
+    "latency_mean_ns": 7492151.426,
+    "latency_p99_upper_ns": 25165824,
+    "latency_max_ns": 25521632,
+    "active_byte_seconds": 1004322.345588,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 129205398,
+    "cpu_ns": 106642340,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1837,
+    "slot_waits": 0,
+    "sleep_ns": 23366005,
+    "latency_mean_ns": 7161052.395,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 19672000,
+    "active_byte_seconds": 961708.896247,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 149831970,
+    "cpu_ns": 119769747,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 207,
+    "slot_waits": 0,
+    "sleep_ns": 22835752,
+    "latency_mean_ns": 8570181.832,
+    "latency_p99_upper_ns": 25165824,
+    "latency_max_ns": 24456487,
+    "active_byte_seconds": 1149620.580849,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 138012595,
+    "cpu_ns": 104050639,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 573,
+    "slot_waits": 0,
+    "sleep_ns": 35587895,
+    "latency_mean_ns": 8024328.08,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11967226,
+    "active_byte_seconds": 1074555.345603,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 139897423,
+    "cpu_ns": 116916607,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1245,
+    "slot_waits": 0,
+    "sleep_ns": 21827476,
+    "latency_mean_ns": 7467830.775,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12057799,
+    "active_byte_seconds": 1002967.933698,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 124760040,
+    "cpu_ns": 105059769,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 279,
+    "slot_waits": 0,
+    "sleep_ns": 20851427,
+    "latency_mean_ns": 7121146.062,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13454333,
+    "active_byte_seconds": 954812.49966,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 128197678,
+    "cpu_ns": 100339777,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 483,
+    "slot_waits": 0,
+    "sleep_ns": 29286062,
+    "latency_mean_ns": 7442559.441,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11489301,
+    "active_byte_seconds": 997040.290853,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 205943127,
+    "cpu_ns": 116032671,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1454,
+    "slot_waits": 0,
+    "sleep_ns": 23092169,
+    "latency_mean_ns": 12031760.945,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20696239,
+    "active_byte_seconds": 1615356.534078,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 126630183,
+    "cpu_ns": 111840417,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 123,
+    "slot_waits": 0,
+    "sleep_ns": 14544050,
+    "latency_mean_ns": 7317376.727,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11766189,
+    "active_byte_seconds": 981675.539219,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 130400357,
+    "cpu_ns": 115426208,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 33,
+    "slot_waits": 0,
+    "sleep_ns": 15522516,
+    "latency_mean_ns": 7311488.307,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 16432805,
+    "active_byte_seconds": 981225.27374,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 158617537,
+    "cpu_ns": 105530265,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 630,
+    "slot_waits": 0,
+    "sleep_ns": 53505513,
+    "latency_mean_ns": 8986415.696,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20150036,
+    "active_byte_seconds": 1202933.657783,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 136167489,
+    "cpu_ns": 109997334,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1562,
+    "slot_waits": 0,
+    "sleep_ns": 27532835,
+    "latency_mean_ns": 7639923.617,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 16520028,
+    "active_byte_seconds": 1026043.651851,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 124401411,
+    "cpu_ns": 111783663,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 108,
+    "slot_waits": 0,
+    "sleep_ns": 12978960,
+    "latency_mean_ns": 7175143.561,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11871096,
+    "active_byte_seconds": 962716.975355,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 140192626,
+    "cpu_ns": 129302907,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 32,
+    "slot_waits": 0,
+    "sleep_ns": 11304553,
+    "latency_mean_ns": 8151791.4,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 11985985,
+    "active_byte_seconds": 1094054.601176,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 127500625,
+    "cpu_ns": 109051339,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 86,
+    "slot_waits": 0,
+    "sleep_ns": 15655621,
+    "latency_mean_ns": 7370372.812,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13648518,
+    "active_byte_seconds": 988934.033123,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 139629443,
+    "cpu_ns": 112148433,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1923,
+    "slot_waits": 0,
+    "sleep_ns": 28146396,
+    "latency_mean_ns": 7999954.838,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 16468658,
+    "active_byte_seconds": 1074362.142096,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 129397045,
+    "cpu_ns": 108222327,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 210,
+    "slot_waits": 0,
+    "sleep_ns": 19281611,
+    "latency_mean_ns": 7449478.358,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13544240,
+    "active_byte_seconds": 999089.777214,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 125060409,
+    "cpu_ns": 101408203,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1720,
+    "slot_waits": 0,
+    "sleep_ns": 24842157,
+    "latency_mean_ns": 7224036.272,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11678097,
+    "active_byte_seconds": 970120.753206,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 121944973,
+    "cpu_ns": 98926473,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 410,
+    "slot_waits": 0,
+    "sleep_ns": 24262193,
+    "latency_mean_ns": 7027416.376,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12229040,
+    "active_byte_seconds": 941745.792822,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 140664495,
+    "cpu_ns": 101124724,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 716,
+    "slot_waits": 0,
+    "sleep_ns": 41804911,
+    "latency_mean_ns": 8134234.887,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 13075389,
+    "active_byte_seconds": 1088709.015188,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 121667696,
+    "cpu_ns": 101165480,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 330,
+    "slot_waits": 0,
+    "sleep_ns": 21242064,
+    "latency_mean_ns": 7047783.954,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11408672,
+    "active_byte_seconds": 944768.902586,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 122887693,
+    "cpu_ns": 108048811,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 100,
+    "slot_waits": 0,
+    "sleep_ns": 15309844,
+    "latency_mean_ns": 6960585.889,
+    "latency_p99_upper_ns": 14680064,
+    "latency_max_ns": 14962365,
+    "active_byte_seconds": 933965.439249,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 127832493,
+    "cpu_ns": 107011535,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 312,
+    "slot_waits": 0,
+    "sleep_ns": 21568032,
+    "latency_mean_ns": 7387611.189,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12693631,
+    "active_byte_seconds": 990437.837956,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 132323981,
+    "cpu_ns": 104579167,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 3970,
+    "budget_waits": 1868,
+    "slot_waits": 0,
+    "sleep_ns": 28280826,
+    "latency_mean_ns": 7629563.252,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12006726,
+    "active_byte_seconds": 1024670.67878,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 117467153,
+    "cpu_ns": 100913544,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 211,
+    "slot_waits": 0,
+    "sleep_ns": 17302742,
+    "latency_mean_ns": 6773721.904,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11750486,
+    "active_byte_seconds": 908428.389283,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 177547354,
+    "cpu_ns": 98087776,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 1077,
+    "slot_waits": 0,
+    "sleep_ns": 66269238,
+    "latency_mean_ns": 10478829.253,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 26359796,
+    "active_byte_seconds": 1401395.334755,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 125,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 127352551,
+    "cpu_ns": 95896509,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 100663296,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1854,
+    "slot_waits": 0,
+    "sleep_ns": 33140024,
+    "latency_mean_ns": 7371263.893,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 11482598,
+    "active_byte_seconds": 989890.745684,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 156176896,
+    "cpu_ns": 135527318,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 8,
+    "slot_waits": 0,
+    "sleep_ns": 19302646,
+    "latency_mean_ns": 8983882.317,
+    "latency_p99_upper_ns": 23068672,
+    "latency_max_ns": 21705495,
+    "active_byte_seconds": 1205798.201258,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 150967021,
+    "cpu_ns": 112103512,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 343,
+    "slot_waits": 0,
+    "sleep_ns": 27798231,
+    "latency_mean_ns": 8607200.207,
+    "latency_p99_upper_ns": 14680064,
+    "latency_max_ns": 15553678,
+    "active_byte_seconds": 1153842.867633,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8350112,
+    "peak_active_bytes": 8350112,
+    "peak_queue": 126,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 131031651,
+    "cpu_ns": 108678412,
+    "input_bytes": 134242304,
+    "output_bytes": 100671488,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 126,
+    "reuses": 1922,
+    "budget_waits": 194,
+    "slot_waits": 0,
+    "sleep_ns": 17318187,
+    "latency_mean_ns": 7550902.647,
+    "latency_p99_upper_ns": 12582912,
+    "latency_max_ns": 12787335,
+    "active_byte_seconds": 1012712.39438,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1048832,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 349,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 196227931,
+    "cpu_ns": 90207409,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 899,
+    "slot_waits": 0,
+    "sleep_ns": 106212702,
+    "latency_mean_ns": 25497204.119,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 38861965,
+    "active_byte_seconds": 1403800.480768,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 282,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 182099749,
+    "cpu_ns": 86444975,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1834,
+    "reuses": 1571,
+    "budget_waits": 951,
+    "slot_waits": 0,
+    "sleep_ns": 99448742,
+    "latency_mean_ns": 18702737.958,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 26735888,
+    "active_byte_seconds": 1347766.35285,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 345,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 170729984,
+    "cpu_ns": 95177478,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 1996,
+    "reuses": 1751,
+    "budget_waits": 848,
+    "slot_waits": 0,
+    "sleep_ns": 79228418,
+    "latency_mean_ns": 22318118.532,
+    "latency_p99_upper_ns": 33554432,
+    "latency_max_ns": 33636461,
+    "active_byte_seconds": 1237184.456112,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 344,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 248649117,
+    "cpu_ns": 108815021,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 1911,
+    "reuses": 1877,
+    "budget_waits": 806,
+    "slot_waits": 0,
+    "sleep_ns": 141754620,
+    "latency_mean_ns": 32835308.438,
+    "latency_p99_upper_ns": 50331648,
+    "latency_max_ns": 52109020,
+    "active_byte_seconds": 1817663.170181,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 343,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 188497435,
+    "cpu_ns": 95408242,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2001,
+    "reuses": 2095,
+    "budget_waits": 825,
+    "slot_waits": 0,
+    "sleep_ns": 93045012,
+    "latency_mean_ns": 24119999.997,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 36830878,
+    "active_byte_seconds": 1331578.296683,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386640,
+    "peak_queue": 112,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 202207266,
+    "cpu_ns": 112741417,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1260,
+    "reuses": 788,
+    "budget_waits": 922,
+    "slot_waits": 0,
+    "sleep_ns": 93158576,
+    "latency_mean_ns": 9030450.097,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 16897915,
+    "active_byte_seconds": 1584952.748115,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 358,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 196788319,
+    "cpu_ns": 85794578,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1594,
+    "reuses": 454,
+    "budget_waits": 835,
+    "slot_waits": 0,
+    "sleep_ns": 111694672,
+    "latency_mean_ns": 25911259.331,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39632482,
+    "active_byte_seconds": 1386620.278442,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 216,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 177004559,
+    "cpu_ns": 88488220,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1769,
+    "reuses": 1287,
+    "budget_waits": 956,
+    "slot_waits": 0,
+    "sleep_ns": 91999803,
+    "latency_mean_ns": 13961564.399,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 20644424,
+    "active_byte_seconds": 1308343.909911,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 349,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 209526727,
+    "cpu_ns": 99009959,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 852,
+    "slot_waits": 0,
+    "sleep_ns": 113158134,
+    "latency_mean_ns": 27706362.205,
+    "latency_p99_upper_ns": 50331648,
+    "latency_max_ns": 49857323,
+    "active_byte_seconds": 1504182.816335,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 216,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 178695721,
+    "cpu_ns": 88024506,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1752,
+    "reuses": 1304,
+    "budget_waits": 957,
+    "slot_waits": 0,
+    "sleep_ns": 93665641,
+    "latency_mean_ns": 14283495.48,
+    "latency_p99_upper_ns": 25165824,
+    "latency_max_ns": 25314392,
+    "active_byte_seconds": 1350685.597943,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 358,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 188062454,
+    "cpu_ns": 85805781,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1613,
+    "reuses": 435,
+    "budget_waits": 876,
+    "slot_waits": 0,
+    "sleep_ns": 106943146,
+    "latency_mean_ns": 25106963.876,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40388905,
+    "active_byte_seconds": 1338315.607594,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 463808,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 349,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 180476475,
+    "cpu_ns": 82814346,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2034,
+    "reuses": 1713,
+    "budget_waits": 906,
+    "slot_waits": 0,
+    "sleep_ns": 101386971,
+    "latency_mean_ns": 23117968.235,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 34624643,
+    "active_byte_seconds": 1287754.655314,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 345,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 179916143,
+    "cpu_ns": 88224841,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2035,
+    "reuses": 2061,
+    "budget_waits": 868,
+    "slot_waits": 0,
+    "sleep_ns": 95038979,
+    "latency_mean_ns": 23134688.68,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 38482948,
+    "active_byte_seconds": 1259295.778761,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 345,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 172458424,
+    "cpu_ns": 95876297,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 1950,
+    "reuses": 1838,
+    "budget_waits": 838,
+    "slot_waits": 0,
+    "sleep_ns": 80637955,
+    "latency_mean_ns": 22201893.822,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 29750009,
+    "active_byte_seconds": 1218383.798869,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386688,
+    "peak_queue": 112,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 202718412,
+    "cpu_ns": 105879101,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1270,
+    "reuses": 778,
+    "budget_waits": 933,
+    "slot_waits": 0,
+    "sleep_ns": 101496664,
+    "latency_mean_ns": 8968645.74,
+    "latency_p99_upper_ns": 15728640,
+    "latency_max_ns": 15509271,
+    "active_byte_seconds": 1593585.502544,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 268,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 178050667,
+    "cpu_ns": 95042355,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1767,
+    "reuses": 1638,
+    "budget_waits": 919,
+    "slot_waits": 0,
+    "sleep_ns": 87305079,
+    "latency_mean_ns": 17737601.933,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 26498834,
+    "active_byte_seconds": 1276748.071158,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1154176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 343,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 166505070,
+    "cpu_ns": 87773371,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2029,
+    "reuses": 2067,
+    "budget_waits": 855,
+    "slot_waits": 0,
+    "sleep_ns": 82039937,
+    "latency_mean_ns": 21365903.831,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 30499822,
+    "active_byte_seconds": 1169734.902412,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388576,
+    "peak_queue": 358,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 184834889,
+    "cpu_ns": 77869217,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1654,
+    "reuses": 394,
+    "budget_waits": 900,
+    "slot_waits": 0,
+    "sleep_ns": 108638540,
+    "latency_mean_ns": 24466594.426,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 45971408,
+    "active_byte_seconds": 1295645.073976,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 346,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 191170037,
+    "cpu_ns": 94174606,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 1933,
+    "reuses": 1855,
+    "budget_waits": 839,
+    "slot_waits": 0,
+    "sleep_ns": 99297240,
+    "latency_mean_ns": 24916604.797,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37194081,
+    "active_byte_seconds": 1364006.158543,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 267,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 221114880,
+    "cpu_ns": 108320175,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1725,
+    "reuses": 1680,
+    "budget_waits": 867,
+    "slot_waits": 0,
+    "sleep_ns": 112272606,
+    "latency_mean_ns": 22302398.136,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 31418968,
+    "active_byte_seconds": 1620151.723755,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 343,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 200423808,
+    "cpu_ns": 95868665,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 1950,
+    "reuses": 1797,
+    "budget_waits": 826,
+    "slot_waits": 0,
+    "sleep_ns": 104684245,
+    "latency_mean_ns": 26149827.952,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37286562,
+    "active_byte_seconds": 1462564.435239,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 348,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 185563183,
+    "cpu_ns": 99669005,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 824,
+    "slot_waits": 0,
+    "sleep_ns": 88520259,
+    "latency_mean_ns": 24158310.672,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 37578913,
+    "active_byte_seconds": 1315287.672243,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388352,
+    "peak_queue": 216,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 285706068,
+    "cpu_ns": 123773735,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1639,
+    "reuses": 1417,
+    "budget_waits": 811,
+    "slot_waits": 0,
+    "sleep_ns": 151915315,
+    "latency_mean_ns": 22809999.729,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 39308704,
+    "active_byte_seconds": 2141933.275175,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386640,
+    "peak_queue": 112,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 277725554,
+    "cpu_ns": 130508378,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1246,
+    "reuses": 802,
+    "budget_waits": 882,
+    "slot_waits": 0,
+    "sleep_ns": 145190817,
+    "latency_mean_ns": 12364716.181,
+    "latency_p99_upper_ns": 25165824,
+    "latency_max_ns": 24717468,
+    "active_byte_seconds": 2188978.814479,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 350,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 266408067,
+    "cpu_ns": 111663429,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1498,
+    "reuses": 550,
+    "budget_waits": 732,
+    "slot_waits": 0,
+    "sleep_ns": 138942208,
+    "latency_mean_ns": 34638344.422,
+    "latency_p99_upper_ns": 54525952,
+    "latency_max_ns": 52949259,
+    "active_byte_seconds": 1878408.17389,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 341,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 204623815,
+    "cpu_ns": 104506177,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 1822,
+    "reuses": 1966,
+    "budget_waits": 758,
+    "slot_waits": 0,
+    "sleep_ns": 97171540,
+    "latency_mean_ns": 25691162.972,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 40286443,
+    "active_byte_seconds": 1429280.943963,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 277,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 162195656,
+    "cpu_ns": 80564634,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1810,
+    "reuses": 1595,
+    "budget_waits": 983,
+    "slot_waits": 0,
+    "sleep_ns": 84519072,
+    "latency_mean_ns": 16670151.746,
+    "latency_p99_upper_ns": 23068672,
+    "latency_max_ns": 21537625,
+    "active_byte_seconds": 1200241.584576,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 350,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 155808970,
+    "cpu_ns": 73686530,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2181,
+    "reuses": 1915,
+    "budget_waits": 970,
+    "slot_waits": 0,
+    "sleep_ns": 84997837,
+    "latency_mean_ns": 20210703.898,
+    "latency_p99_upper_ns": 29360128,
+    "latency_max_ns": 29034418,
+    "active_byte_seconds": 1105823.092919,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 522496,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 343,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 175012120,
+    "cpu_ns": 86574113,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 847,
+    "slot_waits": 0,
+    "sleep_ns": 86153992,
+    "latency_mean_ns": 21577383.531,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 35170512,
+    "active_byte_seconds": 1189109.090661,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386640,
+    "peak_queue": 112,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 192464571,
+    "cpu_ns": 109214745,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1270,
+    "reuses": 778,
+    "budget_waits": 921,
+    "slot_waits": 0,
+    "sleep_ns": 85288420,
+    "latency_mean_ns": 8548822.691,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 14178942,
+    "active_byte_seconds": 1513389.1547,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388496,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 216,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 180744548,
+    "cpu_ns": 92447570,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1772,
+    "reuses": 1284,
+    "budget_waits": 987,
+    "slot_waits": 0,
+    "sleep_ns": 91033265,
+    "latency_mean_ns": 14634490.266,
+    "latency_p99_upper_ns": 20971520,
+    "latency_max_ns": 21334847,
+    "active_byte_seconds": 1375000.84592,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1250624,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388480,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 347,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190539057,
+    "cpu_ns": 89751173,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 1983,
+    "reuses": 1764,
+    "budget_waits": 862,
+    "slot_waits": 0,
+    "sleep_ns": 102577548,
+    "latency_mean_ns": 24120880.139,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 43388027,
+    "active_byte_seconds": 1333423.649457,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 339,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 221349934,
+    "cpu_ns": 109576369,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1871,
+    "reuses": 2225,
+    "budget_waits": 733,
+    "slot_waits": 0,
+    "sleep_ns": 114046592,
+    "latency_mean_ns": 28163326.597,
+    "latency_p99_upper_ns": 46137344,
+    "latency_max_ns": 46133518,
+    "active_byte_seconds": 1540447.287587,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388576,
+    "peak_active_bytes": 8388544,
+    "peak_queue": 351,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 182031656,
+    "cpu_ns": 81559603,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1543,
+    "reuses": 505,
+    "budget_waits": 829,
+    "slot_waits": 0,
+    "sleep_ns": 98044537,
+    "latency_mean_ns": 23787174.92,
+    "latency_p99_upper_ns": 33554432,
+    "latency_max_ns": 33075333,
+    "active_byte_seconds": 1288001.912824,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 458688,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 216,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190119929,
+    "cpu_ns": 98659849,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1748,
+    "reuses": 1308,
+    "budget_waits": 937,
+    "slot_waits": 0,
+    "sleep_ns": 91519644,
+    "latency_mean_ns": 15332315.134,
+    "latency_p99_upper_ns": 27262976,
+    "latency_max_ns": 28453087,
+    "active_byte_seconds": 1432190.421467,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1262912,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388432,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 348,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 181246528,
+    "cpu_ns": 87821814,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 854,
+    "slot_waits": 0,
+    "sleep_ns": 96465580,
+    "latency_mean_ns": 23009953.597,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 35350753,
+    "active_byte_seconds": 1263667.037898,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388608,
+    "peak_active_bytes": 8388608,
+    "peak_queue": 268,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 202902060,
+    "cpu_ns": 94178139,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 1778,
+    "reuses": 1627,
+    "budget_waits": 948,
+    "slot_waits": 0,
+    "sleep_ns": 111627333,
+    "latency_mean_ns": 20292318.825,
+    "latency_p99_upper_ns": 41943040,
+    "latency_max_ns": 42672491,
+    "active_byte_seconds": 1456891.057432,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 1153216,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8386736,
+    "peak_active_bytes": 8386640,
+    "peak_queue": 112,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 187355085,
+    "cpu_ns": 105102970,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1268,
+    "reuses": 780,
+    "budget_waits": 942,
+    "slot_waits": 0,
+    "sleep_ns": 86194520,
+    "latency_mean_ns": 8306217.014,
+    "latency_p99_upper_ns": 16777216,
+    "latency_max_ns": 16560027,
+    "active_byte_seconds": 1467132.987688,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 667904,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 349,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 185932830,
+    "cpu_ns": 88442274,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 1998,
+    "reuses": 1790,
+    "budget_waits": 873,
+    "slot_waits": 0,
+    "sleep_ns": 100159229,
+    "latency_mean_ns": 24415772.17,
+    "latency_p99_upper_ns": 37748736,
+    "latency_max_ns": 35463160,
+    "active_byte_seconds": 1333943.667435,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 8388560,
+    "peak_active_bytes": 8388432,
+    "peak_queue": 351,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 175115990,
+    "cpu_ns": 85590028,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 27916032,
+    "copied_records": 1699,
+    "borrowed_records": 349,
+    "pressure_copies": 1699,
+    "allocations": 2029,
+    "reuses": 1718,
+    "budget_waits": 897,
+    "slot_waits": 0,
+    "sleep_ns": 90980114,
+    "latency_mean_ns": 22901875.606,
+    "latency_p99_upper_ns": 31457280,
+    "latency_max_ns": 30636340,
+    "active_byte_seconds": 1271349.314418,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 519424,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 106,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 194998211,
+    "cpu_ns": 80964449,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2265,
+    "reuses": 1510,
+    "budget_waits": 1251,
+    "slot_waits": 0,
+    "sleep_ns": 117554960,
+    "latency_mean_ns": 6209271.27,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9610047,
+    "active_byte_seconds": 352937.551048,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 191006927,
+    "cpu_ns": 80024226,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1659,
+    "reuses": 389,
+    "budget_waits": 1164,
+    "slot_waits": 0,
+    "sleep_ns": 113283506,
+    "latency_mean_ns": 6749781.49,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 10754747,
+    "active_byte_seconds": 354343.266259,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 72,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 315263040,
+    "cpu_ns": 90750328,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1890,
+    "reuses": 1166,
+    "budget_waits": 1248,
+    "slot_waits": 0,
+    "sleep_ns": 228816753,
+    "latency_mean_ns": 6291155.426,
+    "latency_p99_upper_ns": 13631488,
+    "latency_max_ns": 13216574,
+    "active_byte_seconds": 579371.042178,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 215534802,
+    "cpu_ns": 92135979,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1179,
+    "slot_waits": 0,
+    "sleep_ns": 127073694,
+    "latency_mean_ns": 6714221.641,
+    "latency_p99_upper_ns": 10485760,
+    "latency_max_ns": 12545668,
+    "active_byte_seconds": 387556.898349,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 91,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 240539157,
+    "cpu_ns": 82888986,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2037,
+    "reuses": 1368,
+    "budget_waits": 1333,
+    "slot_waits": 0,
+    "sleep_ns": 157978818,
+    "latency_mean_ns": 6115847.212,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 11204691,
+    "active_byte_seconds": 437508.612236,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 111,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 205803459,
+    "cpu_ns": 87522857,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2361,
+    "reuses": 1735,
+    "budget_waits": 1210,
+    "slot_waits": 0,
+    "sleep_ns": 121961836,
+    "latency_mean_ns": 6356735.332,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12149188,
+    "active_byte_seconds": 363428.263552,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 103,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 218109869,
+    "cpu_ns": 94383237,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2188,
+    "reuses": 1600,
+    "budget_waits": 1166,
+    "slot_waits": 0,
+    "sleep_ns": 128480946,
+    "latency_mean_ns": 7013746.965,
+    "latency_p99_upper_ns": 14680064,
+    "latency_max_ns": 15108236,
+    "active_byte_seconds": 394831.364885,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094032,
+    "peak_queue": 40,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 544543692,
+    "cpu_ns": 90900399,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1332,
+    "reuses": 716,
+    "budget_waits": 1286,
+    "slot_waits": 0,
+    "sleep_ns": 453134113,
+    "latency_mean_ns": 6077465.417,
+    "latency_p99_upper_ns": 11534336,
+    "latency_max_ns": 12176243,
+    "active_byte_seconds": 1028555.825239,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 191836517,
+    "cpu_ns": 62332245,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2460,
+    "reuses": 1636,
+    "budget_waits": 1362,
+    "slot_waits": 0,
+    "sleep_ns": 131898458,
+    "latency_mean_ns": 6069082.115,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8770216,
+    "active_byte_seconds": 346911.480275,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 188885136,
+    "cpu_ns": 63904326,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2356,
+    "reuses": 1432,
+    "budget_waits": 1390,
+    "slot_waits": 0,
+    "sleep_ns": 127844964,
+    "latency_mean_ns": 6121880.805,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8708698,
+    "active_byte_seconds": 342822.067006,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 492789763,
+    "cpu_ns": 76140523,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1347,
+    "reuses": 701,
+    "budget_waits": 1406,
+    "slot_waits": 0,
+    "sleep_ns": 420428963,
+    "latency_mean_ns": 5485700.477,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9955175,
+    "active_byte_seconds": 928718.610429,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 72,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 282084485,
+    "cpu_ns": 66066433,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1992,
+    "reuses": 1064,
+    "budget_waits": 1398,
+    "slot_waits": 0,
+    "sleep_ns": 219096863,
+    "latency_mean_ns": 5671193.431,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 9274955,
+    "active_byte_seconds": 520410.956771,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 224500368,
+    "cpu_ns": 61534673,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2145,
+    "reuses": 1260,
+    "budget_waits": 1465,
+    "slot_waits": 0,
+    "sleep_ns": 165914339,
+    "latency_mean_ns": 5837746.733,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10210564,
+    "active_byte_seconds": 412262.960044,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 189684559,
+    "cpu_ns": 60774942,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2383,
+    "reuses": 1392,
+    "budget_waits": 1399,
+    "slot_waits": 0,
+    "sleep_ns": 131755127,
+    "latency_mean_ns": 6110993.322,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9608714,
+    "active_byte_seconds": 345607.344111,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190441538,
+    "cpu_ns": 59274120,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1383,
+    "slot_waits": 0,
+    "sleep_ns": 133844636,
+    "latency_mean_ns": 6031707.432,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8881216,
+    "active_byte_seconds": 344699.365648,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 175373266,
+    "cpu_ns": 57346839,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1727,
+    "reuses": 321,
+    "budget_waits": 1312,
+    "slot_waits": 0,
+    "sleep_ns": 120854151,
+    "latency_mean_ns": 6287663.374,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8829253,
+    "active_byte_seconds": 326669.995028,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190230224,
+    "cpu_ns": 58883103,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1379,
+    "slot_waits": 0,
+    "sleep_ns": 133923360,
+    "latency_mean_ns": 6020977.936,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8904123,
+    "active_byte_seconds": 344486.353015,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 176712466,
+    "cpu_ns": 57142470,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1727,
+    "reuses": 321,
+    "budget_waits": 1308,
+    "slot_waits": 0,
+    "sleep_ns": 122435178,
+    "latency_mean_ns": 6344282.023,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9173733,
+    "active_byte_seconds": 329327.109037,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 192640551,
+    "cpu_ns": 62036091,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2463,
+    "reuses": 1633,
+    "budget_waits": 1367,
+    "slot_waits": 0,
+    "sleep_ns": 133360267,
+    "latency_mean_ns": 6075663.601,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8830642,
+    "active_byte_seconds": 347845.920578,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 73,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 284454034,
+    "cpu_ns": 68644342,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1983,
+    "reuses": 1073,
+    "budget_waits": 1386,
+    "slot_waits": 0,
+    "sleep_ns": 218577789,
+    "latency_mean_ns": 5702048.39,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 9254474,
+    "active_byte_seconds": 523314.413618,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 226008956,
+    "cpu_ns": 64169718,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2125,
+    "reuses": 1280,
+    "budget_waits": 1458,
+    "slot_waits": 0,
+    "sleep_ns": 164889565,
+    "latency_mean_ns": 5866464.096,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 10318805,
+    "active_byte_seconds": 414911.228869,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 494360387,
+    "cpu_ns": 73512176,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1345,
+    "reuses": 703,
+    "budget_waits": 1395,
+    "slot_waits": 0,
+    "sleep_ns": 424305645,
+    "latency_mean_ns": 5500812.732,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9972009,
+    "active_byte_seconds": 932412.777581,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 188224878,
+    "cpu_ns": 60744558,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2384,
+    "reuses": 1404,
+    "budget_waits": 1411,
+    "slot_waits": 0,
+    "sleep_ns": 130279846,
+    "latency_mean_ns": 6114092.392,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8874864,
+    "active_byte_seconds": 342235.388035,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 189816540,
+    "cpu_ns": 60109883,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2377,
+    "reuses": 1398,
+    "budget_waits": 1401,
+    "slot_waits": 0,
+    "sleep_ns": 132388467,
+    "latency_mean_ns": 6115537.712,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9634918,
+    "active_byte_seconds": 345575.615482,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190593723,
+    "cpu_ns": 62104383,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2377,
+    "reuses": 1398,
+    "budget_waits": 1387,
+    "slot_waits": 0,
+    "sleep_ns": 131246281,
+    "latency_mean_ns": 6133228.412,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9617713,
+    "active_byte_seconds": 346774.138471,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 491528840,
+    "cpu_ns": 70906509,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1353,
+    "reuses": 695,
+    "budget_waits": 1421,
+    "slot_waits": 0,
+    "sleep_ns": 423844868,
+    "latency_mean_ns": 5472000.565,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9945028,
+    "active_byte_seconds": 926418.118409,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190661223,
+    "cpu_ns": 60180004,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1376,
+    "slot_waits": 0,
+    "sleep_ns": 133160918,
+    "latency_mean_ns": 6036141.159,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8916068,
+    "active_byte_seconds": 345094.680154,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 193175809,
+    "cpu_ns": 69008296,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2336,
+    "reuses": 1452,
+    "budget_waits": 1351,
+    "slot_waits": 0,
+    "sleep_ns": 125127054,
+    "latency_mean_ns": 6239198.13,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9276566,
+    "active_byte_seconds": 350903.059901,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 73,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 286766304,
+    "cpu_ns": 73096130,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1974,
+    "reuses": 1082,
+    "budget_waits": 1367,
+    "slot_waits": 0,
+    "sleep_ns": 215532386,
+    "latency_mean_ns": 5744366.208,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 8864197,
+    "active_byte_seconds": 528100.049771,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 225938124,
+    "cpu_ns": 65488664,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2121,
+    "reuses": 1284,
+    "budget_waits": 1445,
+    "slot_waits": 0,
+    "sleep_ns": 163452164,
+    "latency_mean_ns": 5856203.824,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 10380804,
+    "active_byte_seconds": 414648.202609,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 108,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 191114147,
+    "cpu_ns": 63369902,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2453,
+    "reuses": 1643,
+    "budget_waits": 1341,
+    "slot_waits": 0,
+    "sleep_ns": 130459979,
+    "latency_mean_ns": 6032302.559,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8833531,
+    "active_byte_seconds": 345755.184019,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 177942277,
+    "cpu_ns": 63483663,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1711,
+    "reuses": 337,
+    "budget_waits": 1279,
+    "slot_waits": 0,
+    "sleep_ns": 117556310,
+    "latency_mean_ns": 6348716.251,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8883105,
+    "active_byte_seconds": 331194.459386,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097152,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 117,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 191747145,
+    "cpu_ns": 60306782,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2470,
+    "reuses": 1626,
+    "budget_waits": 1379,
+    "slot_waits": 0,
+    "sleep_ns": 134097654,
+    "latency_mean_ns": 6065392.323,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8895161,
+    "active_byte_seconds": 347142.858576,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 187864582,
+    "cpu_ns": 60112693,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28479696,
+    "copied_records": 1740,
+    "borrowed_records": 308,
+    "pressure_copies": 0,
+    "allocations": 2380,
+    "reuses": 1408,
+    "budget_waits": 1409,
+    "slot_waits": 0,
+    "sleep_ns": 130504092,
+    "latency_mean_ns": 6102214.292,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8884715,
+    "active_byte_seconds": 341567.414808,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097120,
+    "peak_active_bytes": 2097120,
+    "peak_queue": 118,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 175293210,
+    "cpu_ns": 56768485,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1722,
+    "reuses": 326,
+    "budget_waits": 1313,
+    "slot_waits": 0,
+    "sleep_ns": 121359184,
+    "latency_mean_ns": 6283898.527,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8849623,
+    "active_byte_seconds": 326483.546647,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 406848,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 73,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 283727960,
+    "cpu_ns": 68131361,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 3824848,
+    "copied_records": 1008,
+    "borrowed_records": 1040,
+    "pressure_copies": 0,
+    "allocations": 1988,
+    "reuses": 1068,
+    "budget_waits": 1394,
+    "slot_waits": 0,
+    "sleep_ns": 218912386,
+    "latency_mean_ns": 5707951.51,
+    "latency_p99_upper_ns": 7340032,
+    "latency_max_ns": 9272677,
+    "active_byte_seconds": 523909.294385,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 386176,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2094128,
+    "peak_active_bytes": 2094128,
+    "peak_queue": 40,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 495666215,
+    "cpu_ns": 81002646,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1336,
+    "reuses": 712,
+    "budget_waits": 1382,
+    "slot_waits": 0,
+    "sleep_ns": 418460319,
+    "latency_mean_ns": 5519510.972,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 9930268,
+    "active_byte_seconds": 935139.458784,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 495872,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 116,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 190841888,
+    "cpu_ns": 60356559,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 53727440,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 1382,
+    "slot_waits": 0,
+    "sleep_ns": 133224289,
+    "latency_mean_ns": 6038284.196,
+    "latency_p99_upper_ns": 8388608,
+    "latency_max_ns": 8947753,
+    "active_byte_seconds": 345496.101548,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097104,
+    "peak_queue": 88,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 226098419,
+    "cpu_ns": 63538828,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 11229392,
+    "copied_records": 1357,
+    "borrowed_records": 691,
+    "pressure_copies": 0,
+    "allocations": 2129,
+    "reuses": 1276,
+    "budget_waits": 1452,
+    "slot_waits": 0,
+    "sleep_ns": 165691682,
+    "latency_mean_ns": 5878789.657,
+    "latency_p99_upper_ns": 7864320,
+    "latency_max_ns": 10264360,
+    "active_byte_seconds": 415107.899759,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 435392,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 2097152,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 2097136,
+    "peak_active_bytes": 2097136,
+    "peak_queue": 115,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 192204126,
+    "cpu_ns": 62496629,
+    "input_bytes": 177631232,
+    "output_bytes": 53735632,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 28385168,
+    "copied_records": 1727,
+    "borrowed_records": 321,
+    "pressure_copies": 1727,
+    "allocations": 2367,
+    "reuses": 1408,
+    "budget_waits": 1381,
+    "slot_waits": 0,
+    "sleep_ns": 132616450,
+    "latency_mean_ns": 6161110.138,
+    "latency_p99_upper_ns": 9437184,
+    "latency_max_ns": 9782879,
+    "active_byte_seconds": 349554.881495,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 523712,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20554720,
+    "cpu_ns": 20527722,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9881.978,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 60759,
+    "active_byte_seconds": 1273.955005,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22216122,
+    "cpu_ns": 22101834,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10698.669,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 58241,
+    "active_byte_seconds": 1.68633,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22839176,
+    "cpu_ns": 22457056,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10958.209,
+    "latency_p99_upper_ns": 20480,
+    "latency_max_ns": 165851,
+    "active_byte_seconds": 1227.172318,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21009107,
+    "cpu_ns": 20955370,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10112.231,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 66129,
+    "active_byte_seconds": 1120.781895,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21132162,
+    "cpu_ns": 21048817,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10163.675,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 68685,
+    "active_byte_seconds": 1121.783606,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20540535,
+    "cpu_ns": 20499501,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9884.486,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 54093,
+    "active_byte_seconds": 1100.863361,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21727605,
+    "cpu_ns": 21682906,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10449.435,
+    "latency_p99_upper_ns": 20480,
+    "latency_max_ns": 65999,
+    "active_byte_seconds": 1348.749968,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 0,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22373067,
+    "cpu_ns": 22308741,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10776.724,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 66703,
+    "active_byte_seconds": 1207.809872,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 25768428,
+    "cpu_ns": 25607575,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 12427.336,
+    "latency_p99_upper_ns": 22528,
+    "latency_max_ns": 135518,
+    "active_byte_seconds": 1.971383,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22601085,
+    "cpu_ns": 22218814,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10886.611,
+    "latency_p99_upper_ns": 28672,
+    "latency_max_ns": 70518,
+    "active_byte_seconds": 1220.513584,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22194827,
+    "cpu_ns": 21633689,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10673.54,
+    "latency_p99_upper_ns": 36864,
+    "latency_max_ns": 207444,
+    "active_byte_seconds": 1178.059751,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 23241749,
+    "cpu_ns": 23003312,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 11135.177,
+    "latency_p99_upper_ns": 22528,
+    "latency_max_ns": 79185,
+    "active_byte_seconds": 1441.524009,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 24103618,
+    "cpu_ns": 23832019,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 11617.114,
+    "latency_p99_upper_ns": 22528,
+    "latency_max_ns": 88389,
+    "active_byte_seconds": 1310.460688,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21191681,
+    "cpu_ns": 21131537,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10199.927,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 68426,
+    "active_byte_seconds": 1132.085862,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21871975,
+    "cpu_ns": 21613127,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10530.066,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 78704,
+    "active_byte_seconds": 1171.334175,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 1,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21555643,
+    "cpu_ns": 21467723,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10366.948,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 62648,
+    "active_byte_seconds": 1339.691796,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20704016,
+    "cpu_ns": 20633572,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9954.482,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 84963,
+    "active_byte_seconds": 1283.092823,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20854404,
+    "cpu_ns": 20822149,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10030.324,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 62445,
+    "active_byte_seconds": 1108.309428,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21286218,
+    "cpu_ns": 21228201,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10237.021,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 67889,
+    "active_byte_seconds": 1129.223222,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22649251,
+    "cpu_ns": 22567445,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10910.76,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 61499,
+    "active_byte_seconds": 1.717551,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20767942,
+    "cpu_ns": 20708872,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9985.038,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 65425,
+    "active_byte_seconds": 1286.595987,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21065681,
+    "cpu_ns": 21006279,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10139.793,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 67018,
+    "active_byte_seconds": 1124.320165,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20961885,
+    "cpu_ns": 20931648,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10087.398,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 60962,
+    "active_byte_seconds": 1117.500277,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 2,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20908700,
+    "cpu_ns": 20878832,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10062.625,
+    "latency_p99_upper_ns": 14336,
+    "latency_max_ns": 70648,
+    "active_byte_seconds": 1116.46627,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21328570,
+    "cpu_ns": 21275351,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10266.949,
+    "latency_p99_upper_ns": 15360,
+    "latency_max_ns": 61241,
+    "active_byte_seconds": 1144.526904,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20408294,
+    "cpu_ns": 20408999,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9812.079,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 48982,
+    "active_byte_seconds": 1265.057763,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 20744256,
+    "cpu_ns": 20744722,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 9979.793,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 42518,
+    "active_byte_seconds": 1107.901257,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21766957,
+    "cpu_ns": 21732111,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10483.601,
+    "latency_p99_upper_ns": 13312,
+    "latency_max_ns": 74593,
+    "active_byte_seconds": 1.653919,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 23474730,
+    "cpu_ns": 23418353,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 11311.146,
+    "latency_p99_upper_ns": 24576,
+    "latency_max_ns": 72445,
+    "active_byte_seconds": 1275.148887,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 25891223,
+    "cpu_ns": 25855036,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 12490.423,
+    "latency_p99_upper_ns": 32768,
+    "latency_max_ns": 62019,
+    "active_byte_seconds": 1433.084986,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 25124448,
+    "cpu_ns": 24854663,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 12097.683,
+    "latency_p99_upper_ns": 24576,
+    "latency_max_ns": 83351,
+    "active_byte_seconds": 1569.932052,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 3,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 21725958,
+    "cpu_ns": 21582704,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10452.028,
+    "latency_p99_upper_ns": 16384,
+    "latency_max_ns": 197777,
+    "active_byte_seconds": 1159.292471,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "project",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 90640,
+    "peak_active_bytes": 90640,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 22202622,
+    "cpu_ns": 22202889,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 10695.292,
+    "latency_p99_upper_ns": 18432,
+    "latency_max_ns": 48444,
+    "active_byte_seconds": 1.688434,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 80,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 27294793,
+    "cpu_ns": 27138353,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 13171.363,
+    "latency_p99_upper_ns": 28672,
+    "latency_max_ns": 78185,
+    "active_byte_seconds": 1515.562825,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 33207148,
+    "cpu_ns": 33180296,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 16048.501,
+    "latency_p99_upper_ns": 36864,
+    "latency_max_ns": 74648,
+    "active_byte_seconds": 1873.802277,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 40643311,
+    "cpu_ns": 40589351,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 19667.254,
+    "latency_p99_upper_ns": 49152,
+    "latency_max_ns": 147388,
+    "active_byte_seconds": 2334.403772,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "threshold",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 28395383,
+    "cpu_ns": 28350296,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 2,
+    "reuses": 4094,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 13707.471,
+    "latency_p99_upper_ns": 26624,
+    "latency_max_ns": 87370,
+    "active_byte_seconds": 1583.182193,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65632,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "borrow",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 25754576,
+    "cpu_ns": 25674260,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 12408.192,
+    "latency_p99_upper_ns": 20480,
+    "latency_max_ns": 98925,
+    "active_byte_seconds": 1611.048102,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "pressure",
+    "pool": true,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156112,
+    "peak_active_bytes": 156112,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 28270087,
+    "cpu_ns": 28259741,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 0,
+    "copied_records": 0,
+    "borrowed_records": 2048,
+    "pressure_copies": 0,
+    "allocations": 1,
+    "reuses": 2047,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 13635.652,
+    "latency_p99_upper_ns": 20480,
+    "latency_max_ns": 75407,
+    "active_byte_seconds": 1772.014643,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 65552,
+    "unreleased_buffer_bytes": 0
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "repeat": 4,
+    "status": "ok",
+    "policy": "copy",
+    "pool": false,
+    "budget_bytes": 8388608,
+    "fixed_bytes": 90560,
+    "peak_reserved_bytes": 156192,
+    "peak_active_bytes": 156192,
+    "peak_queue": 1,
+    "rss_peak_bytes": 28753920,
+    "elapsed_ns": 30675302,
+    "cpu_ns": 30605147,
+    "input_bytes": 134242304,
+    "output_bytes": 139264,
+    "accepted": 2048,
+    "emitted": 2048,
+    "copy_bytes": 131072,
+    "copied_records": 2048,
+    "borrowed_records": 0,
+    "pressure_copies": 0,
+    "allocations": 4096,
+    "reuses": 0,
+    "budget_waits": 0,
+    "slot_waits": 0,
+    "sleep_ns": 0,
+    "latency_mean_ns": 14792.559,
+    "latency_p99_upper_ns": 22528,
+    "latency_max_ns": 144222,
+    "active_byte_seconds": 1690.623657,
+    "live_at_stop_bytes": 0,
+    "cached_at_stop_bytes": 0,
+    "unreleased_buffer_bytes": 0
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/benchmark.c b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/benchmark.c
new file mode 100644
index 0000000..496ad5e
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/benchmark.c
@@ -0,0 +1,320 @@
+#define _POSIX_C_SOURCE 200809L
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <time.h>
+#include <unistd.h>
+
+/* A measurement apparatus, not the Pure runtime or a general document parser. */
+enum { CACHE_SLOTS = 16, SCRATCH = 65536, HIST_SIZE = 512, MAX_FRAME = 8*1024*1024 };
+typedef struct Block { size_t capacity; uint64_t since; unsigned char bytes[]; } Block;
+typedef struct Item {
+    Block *block;
+    size_t offset, length;
+    uint64_t start, ready;
+} Item;
+typedef struct Engine {
+    Item *queue;
+    Block *cache[CACHE_SLOTS];
+    unsigned char scratch[SCRATCH];
+    uint64_t histogram[HIST_SIZE];
+    size_t slots, head, count, fixed, budget, reserved, active, cached;
+    size_t peak_reserved, peak_active, peak_queue;
+    uint64_t allocations, reuses, copies, read_bytes, written_bytes;
+    uint64_t accepted, emitted, copied_records, borrowed_records, pressure_copies;
+    uint64_t budget_waits, slot_waits, sleep_ns, hold_ns, service_ns, last_emit;
+    uint64_t elapsed_ns, cpu_ns, latency_sum, latency_max, start, cancel_after;
+    long double active_byte_ns;
+    unsigned ratio;
+    bool pool;
+    const char *policy, *status;
+} Engine;
+static volatile sig_atomic_t interrupted;
+static void stop(int sig) { (void)sig; interrupted = 1; }
+static uint64_t ns(clockid_t clock) {
+    struct timespec t;
+    if (clock_gettime(clock, &t)) { perror("clock_gettime"); exit(2); }
+    return (uint64_t)t.tv_sec * UINT64_C(1000000000) + (uint64_t)t.tv_nsec;
+}
+static size_t charge(const Block *b) { return sizeof(*b) + b->capacity; }
+static size_t rounded(size_t n) {
+    size_t r = 64;
+    while (r < n) r *= 2;
+    return r;
+}
+static void peaks(Engine *e) {
+    assert(e->active + e->cached == e->reserved);
+    assert(e->fixed + e->reserved <= e->budget);
+    if (e->reserved > e->peak_reserved) e->peak_reserved = e->reserved;
+    if (e->active > e->peak_active) e->peak_active = e->active;
+}
+static void evict(Engine *e, size_t i) {
+    Block *b = e->cache[i];
+    if (!b) return;
+    e->cached -= charge(b); e->reserved -= charge(b);
+    free(b); e->cache[i] = NULL;
+}
+static Block *take(Engine *e, size_t n) {
+    size_t capacity = rounded(n), need = sizeof(Block) + capacity;
+    if (e->pool) {
+        for (size_t i = 0; i < CACHE_SLOTS; ++i) {
+            Block *b = e->cache[i];
+            if (b && b->capacity == capacity) {
+                e->cache[i] = NULL; e->cached -= need; e->active += need;
+                ++e->reuses; b->since = ns(CLOCK_MONOTONIC); peaks(e); return b;
+            }
+        }
+    }
+    for (size_t i = 0; i < CACHE_SLOTS && need > e->budget-e->fixed-e->reserved; ++i)
+        evict(e, i);
+    if (need > e->budget-e->fixed-e->reserved) return NULL;
+    Block *b = malloc(need);
+    if (!b) { e->status = "allocation_failed"; return NULL; }
+    b->capacity = capacity; b->since = ns(CLOCK_MONOTONIC);
+    e->reserved += need; e->active += need; ++e->allocations; peaks(e); return b;
+}
+static void give(Engine *e, Block *b) {
+    if (!b) return;
+    size_t bytes = charge(b);
+    e->active_byte_ns += (long double)bytes * (ns(CLOCK_MONOTONIC)-b->since);
+    e->active -= bytes;
+    if (e->pool && bytes <= e->budget/4-e->cached) {
+        for (size_t i = 0; i < CACHE_SLOTS; ++i) if (!e->cache[i]) {
+            e->cache[i] = b; e->cached += bytes; peaks(e); return;
+        }
+    }
+    e->reserved -= bytes; free(b); peaks(e);
+}
+static bool sleep_until(Engine *e, uint64_t deadline) {
+    uint64_t t = ns(CLOCK_MONOTONIC), start = t;
+    while (t < deadline && !interrupted) {
+        uint64_t delta = deadline-t;
+        struct timespec request = {(time_t)(delta/1000000000), (long)(delta%1000000000)};
+        if (nanosleep(&request, NULL) && errno != EINTR) { e->status="sleep_failed"; return false; }
+        t = ns(CLOCK_MONOTONIC);
+    }
+    e->sleep_ns += t-start;
+    return !interrupted;
+}
+/* floor(log2(ns)) with eight subdivisions: upper bound error <= 12.5%. */
+static unsigned bucket(uint64_t n) {
+    unsigned exponent = 0;
+    for (uint64_t x = n; x > 1; x >>= 1) ++exponent;
+    if (exponent < 3) return (unsigned)n;
+    return exponent*8 + (unsigned)((n-(UINT64_C(1)<<exponent))>>(exponent-3));
+}
+static uint64_t upper(unsigned b) {
+    if (b < 24) return b+1;
+    unsigned exponent = b/8;
+    if (exponent >= 63) return UINT64_MAX;
+    return (UINT64_C(1)<<exponent) + (uint64_t)(b%8+1)*(UINT64_C(1)<<(exponent-3));
+}
+static bool write_all(Engine *e, const void *src, size_t n) {
+    const unsigned char *p = src;
+    while (n && !interrupted) {
+        ssize_t written = write(STDOUT_FILENO, p, n);
+        if (written < 0 && errno == EINTR) continue;
+        if (written <= 0) { e->status = "output_failed"; return false; }
+        p += written; n -= (size_t)written; e->written_bytes += (uint64_t)written;
+    }
+    return !interrupted;
+}
+static bool emit(Engine *e) {
+    assert(e->count);
+    Item *item = &e->queue[e->head];
+    uint64_t ready = item->ready;
+    if (e->last_emit + e->service_ns > ready) ready = e->last_emit + e->service_ns;
+    if (!sleep_until(e, ready)) return false;
+    uint32_t len = (uint32_t)item->length;
+    unsigned char header[4] = {(unsigned char)len, (unsigned char)(len>>8),
+                              (unsigned char)(len>>16), (unsigned char)(len>>24)};
+    if (!write_all(e, header, sizeof header) ||
+        !write_all(e, item->block->bytes+item->offset, item->length)) return false;
+    uint64_t now = ns(CLOCK_MONOTONIC), latency = now-item->start;
+    ++e->histogram[bucket(latency)]; e->latency_sum += latency;
+    if (latency > e->latency_max) e->latency_max = latency;
+    e->last_emit = now; ++e->emitted;
+    give(e, item->block); item->block = NULL;
+    e->head = (e->head+1)%e->slots; --e->count;
+    if (e->cancel_after && e->emitted >= e->cancel_after) {
+        e->status = "cancelled"; return false;
+    }
+    return true;
+}
+static Block *acquire(Engine *e, size_t n) {
+    for (;;) {
+        Block *b = take(e, n);
+        if (b) return b;
+        if (strcmp(e->status, "ok")) return NULL;
+        if (!e->count) { e->status = "budget_too_small"; return NULL; }
+        ++e->budget_waits;
+        if (!emit(e)) return NULL;
+    }
+}
+/* Returns 1 on complete read, 0 on clean EOF before any byte, -1 on failure. */
+static int read_exact(Engine *e, void *dst, size_t n) {
+    unsigned char *p = dst; size_t done = 0;
+    while (done < n && !interrupted) {
+        ssize_t got = read(STDIN_FILENO, p+done, n-done);
+        if (got < 0 && errno == EINTR) continue;
+        if (got < 0) { e->status="input_failed"; return -1; }
+        if (!got) { if (!done) return 0; e->status="truncated_input"; return -1; }
+        done += (size_t)got; e->read_bytes += (uint64_t)got;
+    }
+    return interrupted ? -1 : 1;
+}
+static bool discard(Engine *e, size_t n) {
+    while (n) {
+        size_t chunk = n < SCRATCH ? n : SCRATCH;
+        if (read_exact(e, e->scratch, chunk) != 1) {
+            if (!strcmp(e->status,"ok")) e->status="truncated_input";
+            return false;
+        }
+        n -= chunk;
+    }
+    return true;
+}
+static uint32_t le32(const unsigned char *p) {
+    return (uint32_t)p[0] | (uint32_t)p[1]<<8 | (uint32_t)p[2]<<16 | (uint32_t)p[3]<<24;
+}
+static void run(Engine *e) {
+    for (;;) {
+        if (interrupted) break;
+        if (e->count) {
+            Item *head = &e->queue[e->head];
+            uint64_t now = ns(CLOCK_MONOTONIC);
+            if (now >= head->ready && now >= e->last_emit+e->service_ns) {
+                if (!emit(e)) break;
+                continue;
+            }
+        }
+        if (e->count == e->slots) { ++e->slot_waits; if (!emit(e)) break; }
+        unsigned char header[12];
+        uint64_t start = ns(CLOCK_MONOTONIC);
+        int got = read_exact(e, header, sizeof header);
+        if (got != 1) {
+            if (!got) while (e->count && !interrupted) if (!emit(e)) break;
+            break;
+        }
+        size_t payload = le32(header), offset = le32(header+4), length = le32(header+8);
+        if (!payload || payload > MAX_FRAME || !length || offset > payload || length > payload-offset) {
+            e->status="invalid_frame"; break;
+        }
+        bool project = !strcmp(e->policy,"project");
+        Block *source = acquire(e, project ? length : payload);
+        if (!source) break;
+        bool valid;
+        if (project) {
+            valid = discard(e, offset) && read_exact(e, source->bytes, length)==1 &&
+                    discard(e, payload-offset-length);
+            offset = 0;
+        } else valid = read_exact(e, source->bytes, payload)==1;
+        if (!valid) {
+            if (!strcmp(e->status,"ok")) e->status="truncated_input";
+            give(e, source); break;
+        }
+        bool copy = !strcmp(e->policy,"copy") ||
+            (!strcmp(e->policy,"threshold") && rounded(payload)/rounded(length) >= e->ratio);
+        if (!strcmp(e->policy,"pressure")) {
+            /* Online rule using current charged live buffers; no future lifetime. */
+            copy = rounded(length) < source->capacity &&
+                   e->active > (e->budget-e->fixed)/2;
+            if (copy) ++e->pressure_copies;
+        }
+        if (!project && copy) {
+            Block *small = acquire(e, length);
+            if (!small) { give(e, source); break; }
+            memcpy(small->bytes, source->bytes+offset, length);
+            e->copies += length; ++e->copied_records;
+            give(e, source); source = small; offset = 0;
+        } else if (!project) ++e->borrowed_records;
+        size_t tail = (e->head+e->count)%e->slots;
+        e->queue[tail] = (Item){source, offset, length, start, ns(CLOCK_MONOTONIC)+e->hold_ns};
+        ++e->count; ++e->accepted;
+        if (e->count > e->peak_queue) e->peak_queue=e->count;
+    }
+    if (interrupted) e->status="cancelled";
+}
+static uint64_t number(const char *s, uint64_t maximum) {
+    char *end; errno=0;
+    unsigned long long n = strtoull(s, &end, 10);
+    if (!*s || *s=='-' || *end || errno || n>maximum) { fprintf(stderr,"invalid number\n"); exit(2); }
+    return n;
+}
+int main(int argc, char **argv) {
+    Engine *e = calloc(1, sizeof *e);
+    if (!e) return 2;
+    e->policy="borrow"; e->status="ok"; e->budget=8*1024*1024; e->slots=512;
+    e->ratio=4; e->pool=true;
+    for (int i=1; i<argc; i+=2) {
+        if (i+1==argc) { fprintf(stderr,"options require values\n"); free(e); return 2; }
+        const char *key=argv[i], *value=argv[i+1];
+        if (!strcmp(key,"--policy")) e->policy=value;
+        else if (!strcmp(key,"--budget")) e->budget=(size_t)number(value,1073741824);
+        else if (!strcmp(key,"--slots")) e->slots=(size_t)number(value,4096);
+        else if (!strcmp(key,"--hold-us")) e->hold_ns=number(value,10000000)*1000;
+        else if (!strcmp(key,"--service-us")) e->service_ns=number(value,10000000)*1000;
+        else if (!strcmp(key,"--ratio")) e->ratio=(unsigned)number(value,UINT_MAX);
+        else if (!strcmp(key,"--pool")) e->pool=number(value,1)!=0;
+        else if (!strcmp(key,"--cancel-after")) e->cancel_after=number(value,UINT64_MAX);
+        else { fprintf(stderr,"unknown option\n"); free(e); return 2; }
+    }
+    bool known = !strcmp(e->policy,"borrow") || !strcmp(e->policy,"copy") ||
+        !strcmp(e->policy,"threshold") || !strcmp(e->policy,"pressure") || !strcmp(e->policy,"project");
+    if (!known || !e->slots || e->slots>4096 || e->ratio<2 || e->budget>UINT64_C(1073741824) ||
+        e->hold_ns>UINT64_C(10000000000) || e->service_ns>UINT64_C(10000000000)) {
+        fprintf(stderr,"invalid configuration\n"); free(e); return 2;
+    }
+    e->fixed=sizeof(*e)+e->slots*sizeof(Item);
+    if (e->budget < e->fixed) { fprintf(stderr,"budget below fixed metadata\n"); free(e); return 2; }
+    e->queue=calloc(e->slots,sizeof(Item));
+    if (!e->queue) { free(e); return 2; }
+    signal(SIGINT,stop); signal(SIGTERM,stop); signal(SIGPIPE,SIG_IGN);
+    e->start=ns(CLOCK_MONOTONIC); uint64_t cpu=ns(CLOCK_PROCESS_CPUTIME_ID);
+    run(e);
+    size_t live_at_stop=e->active, cached_at_stop=e->cached;
+    while (e->count) {
+        give(e,e->queue[e->head].block); e->head=(e->head+1)%e->slots; --e->count;
+    }
+    for (size_t i=0;i<CACHE_SLOTS;++i) evict(e,i);
+    assert(!e->active && !e->reserved && !e->cached);
+    e->elapsed_ns=ns(CLOCK_MONOTONIC)-e->start; e->cpu_ns=ns(CLOCK_PROCESS_CPUTIME_ID)-cpu;
+    uint64_t target=e->emitted-e->emitted/100, sum=0, p99=0;
+    for (unsigned b=0; e->emitted && b<HIST_SIZE; ++b) {
+        sum+=e->histogram[b]; if (sum>=target) { p99=upper(b); break; }
+    }
+    struct rusage usage; long rss=0;
+    if (!getrusage(RUSAGE_SELF,&usage)) rss=usage.ru_maxrss;
+#if defined(__APPLE__)
+    uint64_t rss_bytes=(uint64_t)rss;
+#else
+    uint64_t rss_bytes=(uint64_t)rss*1024;
+#endif
+    fprintf(stderr,"{\"status\":\"%s\",\"policy\":\"%s\",\"pool\":%s,"
+        "\"budget_bytes\":%zu,\"fixed_bytes\":%zu,\"peak_reserved_bytes\":%zu,"
+        "\"peak_active_bytes\":%zu,\"peak_queue\":%zu,\"rss_peak_bytes\":%" PRIu64 ","
+        "\"elapsed_ns\":%" PRIu64 ",\"cpu_ns\":%" PRIu64 ",\"input_bytes\":%" PRIu64 ","
+        "\"output_bytes\":%" PRIu64 ",\"accepted\":%" PRIu64 ",\"emitted\":%" PRIu64 ","
+        "\"copy_bytes\":%" PRIu64 ",\"copied_records\":%" PRIu64 ",\"borrowed_records\":%" PRIu64 ","
+        "\"pressure_copies\":%" PRIu64 ",\"allocations\":%" PRIu64 ",\"reuses\":%" PRIu64 ","
+        "\"budget_waits\":%" PRIu64 ",\"slot_waits\":%" PRIu64 ",\"sleep_ns\":%" PRIu64 ","
+        "\"latency_mean_ns\":%.3f,\"latency_p99_upper_ns\":%" PRIu64 ",\"latency_max_ns\":%" PRIu64 ","
+        "\"active_byte_seconds\":%.6Lf,\"live_at_stop_bytes\":%zu,\"cached_at_stop_bytes\":%zu,"
+        "\"unreleased_buffer_bytes\":%zu}\n",
+        e->status,e->policy,e->pool?"true":"false",e->budget,e->fixed,e->fixed+e->peak_reserved,
+        e->fixed+e->peak_active,e->peak_queue,rss_bytes,e->elapsed_ns,e->cpu_ns,e->read_bytes,
+        e->written_bytes,e->accepted,e->emitted,e->copies,e->copied_records,e->borrowed_records,
+        e->pressure_copies,e->allocations,e->reuses,e->budget_waits,e->slot_waits,e->sleep_ns,
+        e->emitted?(double)e->latency_sum/(double)e->emitted:0,p99,e->latency_max,
+        e->active_byte_ns/1e9L,live_at_stop,cached_at_stop,e->reserved);
+    int result=!strcmp(e->status,"ok")?0:!strcmp(e->status,"cancelled")?3:2;
+    free(e->queue); free(e); return result;
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/plan.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/plan.json
new file mode 100644
index 0000000..5040006
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/plan.json
@@ -0,0 +1,33 @@
+{
+  "version": 1,
+  "written_before_measurement": true,
+  "seed": 20260922,
+  "repeats": 5,
+  "slots": 512,
+  "policies": [
+    {"name": "borrow", "policy": "borrow", "pool": 1},
+    {"name": "copy", "policy": "copy", "pool": 1},
+    {"name": "threshold2", "policy": "threshold", "ratio": 2, "pool": 1},
+    {"name": "threshold4", "policy": "threshold", "ratio": 4, "pool": 1},
+    {"name": "threshold8", "policy": "threshold", "ratio": 8, "pool": 1},
+    {"name": "pressure", "policy": "pressure", "pool": 1},
+    {"name": "project", "policy": "project", "pool": 1},
+    {"name": "copy_no_pool", "policy": "copy", "pool": 0}
+  ],
+  "cases": [
+    {"name": "sparse_slow", "shape": "sparse", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "dense_slow", "shape": "dense", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "mixed_slow", "shape": "mixed", "records": 2048, "budget": 8388608, "hold_us": 5000, "service_us": 20},
+    {"name": "mixed_tight", "shape": "mixed", "records": 2048, "budget": 2097152, "hold_us": 5000, "service_us": 20},
+    {"name": "sparse_fast", "shape": "sparse", "records": 2048, "budget": 8388608, "hold_us": 0, "service_us": 0}
+  ],
+  "expectations": [
+    "Borrow retains full source allocations for small selections.",
+    "Copy can add CPU and transient source plus destination memory for dense selections.",
+    "A current-pressure rule need not outperform a static size rule or early projection.",
+    "Pool reuse can reduce allocation calls while increasing reserved idle memory.",
+    "No Pure-specific advantage, application SLO, or statistical significance is presumed."
+  ],
+  "comparison_rule": "Report all presets and repetitions; no post-hoc winner is called an out-of-sample tuned policy.",
+  "limits": "Single FIFO local pipeline with synthetic delayed sink. No Sonic/Node/.NET benchmark, fan-out, persistent cache, generic JSON parser, external open-loop arrivals, or production SLO."
+}
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/run.py b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/run.py
new file mode 100644
index 0000000..94657cc
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/sources/run.py
@@ -0,0 +1,281 @@
+#!/usr/bin/env python3
+"""Build, independently verify, and measure the retention experiment."""
+import argparse
+import csv
+import hashlib
+import json
+import os
+from pathlib import Path
+import platform
+import random
+import shlex
+import signal
+import statistics
+import struct
+import subprocess
+import tempfile
+import time
+
+ROOT = Path(__file__).resolve().parent
+FLAGS = ["-std=c17", "-Wall", "-Wextra", "-Wpedantic", "-Werror", "-O2", "-g"]
+
+
+def digest(path):
+    with open(path, "rb") as stream:
+        return hashlib.file_digest(stream, "sha256").hexdigest()
+
+
+def dump(path, value):
+    path.write_text(json.dumps(value, indent=2, ensure_ascii=False) + "\n")
+
+
+def build(cc, output, sanitizer=False):
+    command = [*cc, *FLAGS]
+    if sanitizer:
+        command += ["-fsanitize=address,undefined", "-fno-omit-frame-pointer"]
+    command += [str(ROOT / "benchmark.c"), "-o", str(output)]
+    result = subprocess.run(command, capture_output=True, text=True, check=True)
+    return {"command": command, "stderr": result.stderr, "sha256": digest(output),
+            "size_bytes": output.stat().st_size}
+
+
+def shape_for(shape, rng, i):
+    if shape == "sparse":
+        return 65536, 64
+    if shape == "dense":
+        return 65536, 49152
+    if shape == "mixed":
+        source = rng.choice([4096, 16384, 65536, 262144])
+        keep = max(16, source // rng.choice([1, 2, 4, 8, 64, 1024]))
+        return source, keep
+    if shape == "test":
+        return [(1, 1), (63, 17), (4097, 12), (65536, 49152), (127, 127)][i % 5]
+    raise ValueError(shape)
+
+
+def fixture(path, shape, count, seed):
+    rng = random.Random(seed)
+    expected = hashlib.sha256()
+    total = 0
+    with path.open("wb") as stream:
+        for i in range(count):
+            size, keep = shape_for(shape, rng, i)
+            offset = rng.randrange(size - keep + 1)
+            # All input bytes exist on disk; no sparse files or seeking past data.
+            tile = rng.randbytes(256)
+            payload = (tile * ((size + 255) // 256))[:size]
+            stream.write(struct.pack("<III", size, offset, keep))
+            stream.write(payload)
+            out = struct.pack("<I", keep) + payload[offset:offset + keep]
+            expected.update(out)
+            total += len(out)
+    return {"path": path.name, "shape": shape, "records": count, "seed": seed,
+            "input_bytes": path.stat().st_size, "input_sha256": digest(path),
+            "expected_output_bytes": total, "expected_output_sha256": expected.hexdigest()}
+
+
+def reference(data):
+    result = bytearray()
+    at = 0
+    while at < len(data):
+        if len(data) - at < 12:
+            raise ValueError("short header")
+        size, offset, keep = struct.unpack_from("<III", data, at)
+        at += 12
+        if not 0 < size <= 8 * 1024 * 1024 or not 0 < keep <= size or offset > size - keep:
+            raise ValueError("invalid frame")
+        if len(data) - at < size:
+            raise ValueError("short payload")
+        result.extend(struct.pack("<I", keep))
+        result.extend(data[at + offset:at + offset + keep])
+        at += size
+    return bytes(result)
+
+
+def command(binary, case, policy, *extra):
+    args = [str(binary), "--policy", policy["policy"], "--pool", str(policy.get("pool", 1)),
+            "--ratio", str(policy.get("ratio", 4)), "--budget", str(case.get("budget", 8388608)),
+            "--slots", str(case.get("slots", 512)), "--hold-us", str(case.get("hold_us", 0)),
+            "--service-us", str(case.get("service_us", 0))]
+    return args + list(extra)
+
+
+def metrics(stderr):
+    # Sanitizer diagnostics must not be silently ignored.
+    text = stderr.decode().strip()
+    try:
+        result = json.loads(text)
+    except json.JSONDecodeError as exc:
+        raise AssertionError(f"Expected metrics only; tool/runtime diagnostics:\n{text}") from exc
+    assert result["unreleased_buffer_bytes"] == 0, result
+    assert result["peak_active_bytes"] <= result["peak_reserved_bytes"] <= result["budget_bytes"], result
+    return result
+
+
+def check(binary, tmp, policies):
+    checks = []
+    test = tmp / "test.frames"
+    fixture(test, "test", 45, 177)
+    data = test.read_bytes()
+    expected = reference(data)
+    for policy in policies:
+        for slow in [False, True]:
+            case = {"slots": 7, "hold_us": 100 if slow else 0, "budget": 300000}
+            result = subprocess.run(command(binary, case, policy), input=data, capture_output=True, timeout=15)
+            m = metrics(result.stderr)
+            assert result.returncode == 0 and m["status"] == "ok", (policy, result.stderr)
+            assert result.stdout == expected and m["emitted"] == 45
+            assert m["input_bytes"] == len(data) and m["output_bytes"] == len(expected)
+            assert m["live_at_stop_bytes"] == 0
+            checks.append(f'{policy["name"]}: byte equality, accounting, cleanup, slow={slow}')
+        # Truncation at both header and payload boundaries, including exact missing payload.
+        bad_inputs = [b"x", struct.pack("<III", 12, 0, 4),
+                      struct.pack("<III", 12, 0, 4) + b"123",
+                      struct.pack("<III", 12, 11, 4) + b"x" * 12,
+                      struct.pack("<III", 0, 0, 0),
+                      struct.pack("<III", 8 * 1024 * 1024 + 1, 0, 1)]
+        for bad in bad_inputs:
+            result = subprocess.run(command(binary, {"hold_us": 1000}, policy),
+                                    input=data[:13] + bad, capture_output=True, timeout=15)
+            m = metrics(result.stderr)
+            assert result.returncode == 2 and m["status"] in {"invalid_frame", "truncated_input"}
+        checks.append(f'{policy["name"]}: six malformed inputs with pending buffer cleanup')
+        result = subprocess.run(command(binary, {"hold_us": 1000}, policy, "--cancel-after", "3"),
+                                input=data, capture_output=True, timeout=15)
+        m = metrics(result.stderr)
+        prefix_end = 0
+        for _ in range(3):
+            prefix_end += 4 + struct.unpack_from("<I", expected, prefix_end)[0]
+        assert result.returncode == 3 and m["status"] == "cancelled" and m["emitted"] == 3
+        assert result.stdout == expected[:prefix_end]
+        checks.append(f'{policy["name"]}: cancellation preserves completed output prefix and releases pending buffers')
+        result = subprocess.run(command(binary, {}, policy), input=b"", capture_output=True, timeout=15)
+        assert result.returncode == 0 and metrics(result.stderr)["emitted"] == 0
+        checks.append(f'{policy["name"]}: empty stream')
+    # Tight budget must refuse a whole-frame requirement, while streaming projection can work.
+    large = struct.pack("<III", 1048576, 17, 64) + b"a" * 1048576
+    for policy in policies:
+        result = subprocess.run(command(binary, {"budget": 131072, "slots": 1}, policy),
+                                input=large, capture_output=True, timeout=15)
+        m = metrics(result.stderr)
+        assert m["status"] == ("ok" if policy["policy"] == "project" else "budget_too_small")
+    checks.append("frame larger than buffer budget: bounded refusal versus projection")
+    if Path("/dev/full").exists():
+        with open("/dev/full", "wb") as sink:
+            result = subprocess.run(command(binary, {"hold_us": 1000}, policies[0]), input=data,
+                                    stdout=sink, stderr=subprocess.PIPE, timeout=15)
+        assert result.returncode == 2 and metrics(result.stderr)["status"] == "output_failed"
+        checks.append("real output failure through /dev/full, pending buffers released")
+    # Real signal cancellation after allocation, while waiting for the delayed sink.
+    with test.open("rb") as source, open(os.devnull, "wb") as sink:
+        proc = subprocess.Popen(command(binary, {"hold_us": 500000}, policies[0]),
+                                stdin=source, stdout=sink, stderr=subprocess.PIPE)
+        time.sleep(0.08)
+        proc.send_signal(signal.SIGTERM)
+        _, error = proc.communicate(timeout=5)
+    assert proc.returncode == 3 and metrics(error)["status"] == "cancelled", error
+    checks.append("SIGTERM interrupts delayed sink and releases buffers")
+    return checks
+
+
+def sample(binary, source, output, case, policy):
+    with source.open("rb") as inp, output.open("wb") as out:
+        result = subprocess.run(command(binary, case, policy), stdin=inp, stdout=out,
+                                stderr=subprocess.PIPE, timeout=30)
+    m = metrics(result.stderr)
+    assert result.returncode == 0 and m["status"] == "ok", result.stderr
+    return m
+
+
+def summarize(rows):
+    result = []
+    names = ["elapsed_ns", "cpu_ns", "peak_reserved_bytes", "peak_active_bytes", "rss_peak_bytes",
+             "copy_bytes", "active_byte_seconds", "latency_mean_ns", "latency_p99_upper_ns",
+             "budget_waits", "allocations", "reuses"]
+    groups = sorted({(r["case"], r["variant"]) for r in rows})
+    for case, variant in groups:
+        group = [r for r in rows if (r["case"], r["variant"]) == (case, variant)]
+        value = {"case": case, "variant": variant, "samples": len(group)}
+        for name in names:
+            values = [r[name] for r in group]
+            value[name] = {"median": statistics.median(values), "min": min(values), "max": max(values)}
+        result.append(value)
+    return result
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--check-only", action="store_true")
+    parser.add_argument("--output", type=Path)
+    args = parser.parse_args()
+    if not args.check_only and args.output is None:
+        parser.error("provide --check-only or --output (new directory)")
+    if args.output:
+        args.output.mkdir(parents=True, exist_ok=False)
+    cc = shlex.split(os.environ.get("CC", "cc"))
+    plan = json.loads((ROOT / "plan.json").read_text())
+    affinity = None
+    if hasattr(os, "sched_getaffinity"):
+        affinity = min(os.sched_getaffinity(0))
+        os.sched_setaffinity(0, {affinity})
+    with tempfile.TemporaryDirectory(prefix="pure-retention-") as folder:
+        tmp = Path(folder)
+        native, sanitized = tmp / "bench", tmp / "bench-sanitized"
+        builds = [build(cc, native), build(cc, sanitized, True)]
+        verification = {"native": check(native, tmp, plan["policies"]),
+                        "asan_ubsan": check(sanitized, tmp, plan["policies"])}
+        print(f'Verified {sum(map(len, verification.values()))} scenario groups (native + ASan/UBSan).', flush=True)
+        if args.check_only:
+            return
+        sources = {name: digest(ROOT / name) for name in ["benchmark.c", "run.py", "plan.json"]}
+        environment = {"platform": platform.platform(), "machine": platform.machine(),
+                       "python": platform.python_version(), "cpu_affinity": affinity,
+                       "compiler": subprocess.check_output([*cc, "--version"], text=True),
+                       "builds": builds, "source_sha256": sources,
+                       "clock": "CLOCK_MONOTONIC; CPU = CLOCK_PROCESS_CPUTIME_ID",
+                       "timing": "includes file IO, scheduling, deliberate sleep, metrics, buffer cleanup; excludes startup/build/fixture/verification",
+                       "limitations": "shared host; unregulated thermals; cached files; output page cache, no fsync; synthetic closed-loop arrivals",
+                       "started_utc": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())}
+        if Path("/proc/cpuinfo").exists():
+            environment["cpuinfo"] = Path("/proc/cpuinfo").read_text()
+        dump(args.output / "environment.json", environment)
+        dump(args.output / "verification.json", verification)
+        dump(args.output / "plan.json", plan)
+        fixtures, rows = [], []
+        rng = random.Random(plan["seed"])
+        for case in plan["cases"]:
+            source, output = tmp / "input.frames", tmp / "output.frames"
+            info = fixture(source, case["shape"], case["records"], plan["seed"])
+            info["case"] = case["name"]
+            fixtures.append(info)
+            # Warm each strategy once. The following measurements use fresh processes.
+            for policy in plan["policies"]:
+                sample(native, source, output, case, policy)
+                assert digest(output) == info["expected_output_sha256"]
+            for repeat in range(plan["repeats"]):
+                order = list(plan["policies"])
+                rng.shuffle(order)
+                for policy in order:
+                    m = sample(native, source, output, case, policy)
+                    assert m["accepted"] == m["emitted"] == case["records"]
+                    assert m["input_bytes"] == info["input_bytes"]
+                    assert m["output_bytes"] == info["expected_output_bytes"]
+                    assert digest(output) == info["expected_output_sha256"]
+                    rows.append({"case": case["name"], "variant": policy["name"], "repeat": repeat, **m})
+            dump(args.output / "raw.json", rows)
+            dump(args.output / "fixtures.json", fixtures)
+            print(f'Completed {case["name"]}: {len(plan["policies"])} variants x {plan["repeats"]} trials.', flush=True)
+        dump(args.output / "summary.json", summarize(rows))
+        with (args.output / "raw.csv").open("w") as out:
+            writer = csv.DictWriter(out, fieldnames=list(rows[0]))
+            writer.writeheader()
+            writer.writerows(rows)
+        # Detect accidental source edits during a measurement run.
+        assert sources == {name: digest(ROOT / name) for name in sources}
+        dump(args.output / "complete.json", {"samples": len(rows), "all_output_hashes_match": True,
+                                             "finished_utc": time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())})
+        print(args.output.resolve())
+
+
+if __name__ == "__main__":
+    main()
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/summary.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/summary.json
new file mode 100644
index 0000000..541ce87
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/summary.json
@@ -0,0 +1,2602 @@
+[
+  {
+    "case": "dense_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 132968553,
+      "min": 122887693,
+      "max": 156176896
+    },
+    "cpu_ns": {
+      "median": 110199520,
+      "min": 105059769,
+      "max": 135527318
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1007870.242312,
+      "min": 933965.439249,
+      "max": 1205798.201258
+    },
+    "latency_mean_ns": {
+      "median": 7516016.308,
+      "min": 6960585.889,
+      "max": 8983882.317
+    },
+    "latency_p99_upper_ns": {
+      "median": 14680064,
+      "min": 12582912,
+      "max": 23068672
+    },
+    "budget_waits": {
+      "median": 100,
+      "min": 8,
+      "max": 279
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 139629443,
+      "min": 132323981,
+      "max": 139897423
+    },
+    "cpu_ns": {
+      "median": 109997334,
+      "min": 98850013,
+      "max": 116916607
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 100663296,
+      "min": 100663296,
+      "max": 100663296
+    },
+    "active_byte_seconds": {
+      "median": 1026043.651851,
+      "min": 1002967.933698,
+      "max": 1090782.263887
+    },
+    "latency_mean_ns": {
+      "median": 7639923.617,
+      "min": 7467830.775,
+      "max": 8122260.495
+    },
+    "latency_p99_upper_ns": {
+      "median": 11534336,
+      "min": 11534336,
+      "max": 16777216
+    },
+    "budget_waits": {
+      "median": 1868,
+      "min": 1245,
+      "max": 1923
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 3970,
+      "min": 3970,
+      "max": 3970
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 129205398,
+      "min": 125060409,
+      "max": 205943127
+    },
+    "cpu_ns": {
+      "median": 106642340,
+      "min": 95896509,
+      "max": 116032671
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 100663296,
+      "min": 100663296,
+      "max": 100663296
+    },
+    "active_byte_seconds": {
+      "median": 989890.745684,
+      "min": 961708.896247,
+      "max": 1615356.534078
+    },
+    "latency_mean_ns": {
+      "median": 7371263.893,
+      "min": 7161052.395,
+      "max": 12031760.945
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 20971520
+    },
+    "budget_waits": {
+      "median": 1720,
+      "min": 1363,
+      "max": 1854
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 131031651,
+      "min": 121667696,
+      "max": 148054808
+    },
+    "cpu_ns": {
+      "median": 110625767,
+      "min": 101165480,
+      "max": 118930635
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1012712.39438,
+      "min": 944768.902586,
+      "max": 1145837.182993
+    },
+    "latency_mean_ns": {
+      "median": 7550902.647,
+      "min": 7047783.954,
+      "max": 8545660.143
+    },
+    "latency_p99_upper_ns": {
+      "median": 12582912,
+      "min": 11534336,
+      "max": 16777216
+    },
+    "budget_waits": {
+      "median": 217,
+      "min": 108,
+      "max": 330
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 153699255,
+      "min": 138012595,
+      "max": 177547354
+    },
+    "cpu_ns": {
+      "median": 101124724,
+      "min": 97036844,
+      "max": 105530265
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1191532.621299,
+      "min": 1074555.345603,
+      "max": 1401395.334755
+    },
+    "latency_mean_ns": {
+      "median": 8908081.106,
+      "min": 8024328.08,
+      "max": 10478829.253
+    },
+    "latency_p99_upper_ns": {
+      "median": 15728640,
+      "min": 11534336,
+      "max": 27262976
+    },
+    "budget_waits": {
+      "median": 716,
+      "min": 573,
+      "max": 1077
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 127102070,
+      "min": 121944973,
+      "max": 150967021
+    },
+    "cpu_ns": {
+      "median": 109226645,
+      "min": 98389110,
+      "max": 112103512
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 988062.578411,
+      "min": 941745.792822,
+      "max": 1153842.867633
+    },
+    "latency_mean_ns": {
+      "median": 7376714.273,
+      "min": 7027416.376,
+      "max": 8607200.207
+    },
+    "latency_p99_upper_ns": {
+      "median": 11534336,
+      "min": 11534336,
+      "max": 14680064
+    },
+    "budget_waits": {
+      "median": 343,
+      "min": 123,
+      "max": 548
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 128197678,
+      "min": 117467153,
+      "max": 152388963
+    },
+    "cpu_ns": {
+      "median": 105658521,
+      "min": 100339777,
+      "max": 133280290
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 997040.290853,
+      "min": 908428.389283,
+      "max": 1188061.088853
+    },
+    "latency_mean_ns": {
+      "median": 7442559.441,
+      "min": 6773721.904,
+      "max": 8858624.865
+    },
+    "latency_p99_upper_ns": {
+      "median": 13631488,
+      "min": 11534336,
+      "max": 25165824
+    },
+    "budget_waits": {
+      "median": 263,
+      "min": 86,
+      "max": 483
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "dense_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 130400357,
+      "min": 127832493,
+      "max": 158487631
+    },
+    "cpu_ns": {
+      "median": 108222327,
+      "min": 104607294,
+      "max": 119769747
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 999089.777214,
+      "min": 981225.27374,
+      "max": 1223330.140557
+    },
+    "latency_mean_ns": {
+      "median": 7449478.358,
+      "min": 7311488.307,
+      "max": 9142910.493
+    },
+    "latency_p99_upper_ns": {
+      "median": 13631488,
+      "min": 12582912,
+      "max": 25165824
+    },
+    "budget_waits": {
+      "median": 210,
+      "min": 33,
+      "max": 881
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 202207266,
+      "min": 187355085,
+      "max": 277725554
+    },
+    "cpu_ns": {
+      "median": 109214745,
+      "min": 105102970,
+      "max": 130508378
+    },
+    "peak_reserved_bytes": {
+      "median": 8386736,
+      "min": 8386736,
+      "max": 8386736
+    },
+    "peak_active_bytes": {
+      "median": 8386640,
+      "min": 8386640,
+      "max": 8386688
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1584952.748115,
+      "min": 1467132.987688,
+      "max": 2188978.814479
+    },
+    "latency_mean_ns": {
+      "median": 8968645.74,
+      "min": 8306217.014,
+      "max": 12364716.181
+    },
+    "latency_p99_upper_ns": {
+      "median": 15728640,
+      "min": 13631488,
+      "max": 25165824
+    },
+    "budget_waits": {
+      "median": 922,
+      "min": 882,
+      "max": 942
+    },
+    "allocations": {
+      "median": 1268,
+      "min": 1246,
+      "max": 1270
+    },
+    "reuses": {
+      "median": 780,
+      "min": 778,
+      "max": 802
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 179916143,
+      "min": 155808970,
+      "max": 221349934
+    },
+    "cpu_ns": {
+      "median": 88224841,
+      "min": 73686530,
+      "max": 109576369
+    },
+    "peak_reserved_bytes": {
+      "median": 8388560,
+      "min": 8388432,
+      "max": 8388576
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 1259295.778761,
+      "min": 1105823.092919,
+      "max": 1540447.287587
+    },
+    "latency_mean_ns": {
+      "median": 23134688.68,
+      "min": 20210703.898,
+      "max": 28163326.597
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 29360128,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 855,
+      "min": 733,
+      "max": 970
+    },
+    "allocations": {
+      "median": 2029,
+      "min": 1871,
+      "max": 2181
+    },
+    "reuses": {
+      "median": 2067,
+      "min": 1915,
+      "max": 2225
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 185563183,
+      "min": 175012120,
+      "max": 209526727
+    },
+    "cpu_ns": {
+      "median": 90207409,
+      "min": 86574113,
+      "max": 99669005
+    },
+    "peak_reserved_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 1315287.672243,
+      "min": 1189109.090661,
+      "max": 1504182.816335
+    },
+    "latency_mean_ns": {
+      "median": 24158310.672,
+      "min": 21577383.531,
+      "max": 27706362.205
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 50331648
+    },
+    "budget_waits": {
+      "median": 852,
+      "min": 824,
+      "max": 899
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 180476475,
+      "min": 170729984,
+      "max": 200423808
+    },
+    "cpu_ns": {
+      "median": 89751173,
+      "min": 82814346,
+      "max": 95868665
+    },
+    "peak_reserved_bytes": {
+      "median": 8388560,
+      "min": 8388480,
+      "max": 8388560
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 27916032,
+      "min": 27916032,
+      "max": 27916032
+    },
+    "active_byte_seconds": {
+      "median": 1287754.655314,
+      "min": 1237184.456112,
+      "max": 1462564.435239
+    },
+    "latency_mean_ns": {
+      "median": 23117968.235,
+      "min": 22318118.532,
+      "max": 26149827.952
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 31457280,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 862,
+      "min": 826,
+      "max": 906
+    },
+    "allocations": {
+      "median": 1996,
+      "min": 1950,
+      "max": 2034
+    },
+    "reuses": {
+      "median": 1751,
+      "min": 1713,
+      "max": 1797
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 188062454,
+      "min": 182031656,
+      "max": 266408067
+    },
+    "cpu_ns": {
+      "median": 85794578,
+      "min": 77869217,
+      "max": 111663429
+    },
+    "peak_reserved_bytes": {
+      "median": 8388576,
+      "min": 8388576,
+      "max": 8388608
+    },
+    "peak_active_bytes": {
+      "median": 8388544,
+      "min": 8388544,
+      "max": 8388576
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1338315.607594,
+      "min": 1288001.912824,
+      "max": 1878408.17389
+    },
+    "latency_mean_ns": {
+      "median": 25106963.876,
+      "min": 23787174.92,
+      "max": 34638344.422
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 33554432,
+      "max": 54525952
+    },
+    "budget_waits": {
+      "median": 835,
+      "min": 732,
+      "max": 900
+    },
+    "allocations": {
+      "median": 1594,
+      "min": 1498,
+      "max": 1654
+    },
+    "reuses": {
+      "median": 454,
+      "min": 394,
+      "max": 550
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 191170037,
+      "min": 172458424,
+      "max": 248649117
+    },
+    "cpu_ns": {
+      "median": 95876297,
+      "min": 88442274,
+      "max": 108815021
+    },
+    "peak_reserved_bytes": {
+      "median": 8388560,
+      "min": 8388432,
+      "max": 8388560
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388432,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 28479696,
+      "min": 28479696,
+      "max": 28479696
+    },
+    "active_byte_seconds": {
+      "median": 1364006.158543,
+      "min": 1218383.798869,
+      "max": 1817663.170181
+    },
+    "latency_mean_ns": {
+      "median": 24916604.797,
+      "min": 22201893.822,
+      "max": 32835308.438
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 29360128,
+      "max": 50331648
+    },
+    "budget_waits": {
+      "median": 838,
+      "min": 758,
+      "max": 873
+    },
+    "allocations": {
+      "median": 1933,
+      "min": 1822,
+      "max": 1998
+    },
+    "reuses": {
+      "median": 1855,
+      "min": 1790,
+      "max": 1966
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 182099749,
+      "min": 162195656,
+      "max": 221114880
+    },
+    "cpu_ns": {
+      "median": 94178139,
+      "min": 80564634,
+      "max": 108320175
+    },
+    "peak_reserved_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "peak_active_bytes": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 8388608
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 11229392,
+      "min": 11229392,
+      "max": 11229392
+    },
+    "active_byte_seconds": {
+      "median": 1347766.35285,
+      "min": 1200241.584576,
+      "max": 1620151.723755
+    },
+    "latency_mean_ns": {
+      "median": 18702737.958,
+      "min": 16670151.746,
+      "max": 22302398.136
+    },
+    "latency_p99_upper_ns": {
+      "median": 27262976,
+      "min": 23068672,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 948,
+      "min": 867,
+      "max": 983
+    },
+    "allocations": {
+      "median": 1778,
+      "min": 1725,
+      "max": 1834
+    },
+    "reuses": {
+      "median": 1627,
+      "min": 1571,
+      "max": 1680
+    }
+  },
+  {
+    "case": "mixed_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 180744548,
+      "min": 177004559,
+      "max": 285706068
+    },
+    "cpu_ns": {
+      "median": 92447570,
+      "min": 88024506,
+      "max": 123773735
+    },
+    "peak_reserved_bytes": {
+      "median": 8388608,
+      "min": 8388496,
+      "max": 8388608
+    },
+    "peak_active_bytes": {
+      "median": 8388432,
+      "min": 8388352,
+      "max": 8388432
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 3824848,
+      "min": 3824848,
+      "max": 3824848
+    },
+    "active_byte_seconds": {
+      "median": 1375000.84592,
+      "min": 1308343.909911,
+      "max": 2141933.275175
+    },
+    "latency_mean_ns": {
+      "median": 14634490.266,
+      "min": 13961564.399,
+      "max": 22809999.729
+    },
+    "latency_p99_upper_ns": {
+      "median": 25165824,
+      "min": 20971520,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 956,
+      "min": 811,
+      "max": 987
+    },
+    "allocations": {
+      "median": 1752,
+      "min": 1639,
+      "max": 1772
+    },
+    "reuses": {
+      "median": 1304,
+      "min": 1284,
+      "max": 1417
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 494360387,
+      "min": 491528840,
+      "max": 544543692
+    },
+    "cpu_ns": {
+      "median": 76140523,
+      "min": 70906509,
+      "max": 90900399
+    },
+    "peak_reserved_bytes": {
+      "median": 2094128,
+      "min": 2094128,
+      "max": 2094128
+    },
+    "peak_active_bytes": {
+      "median": 2094128,
+      "min": 2094032,
+      "max": 2094128
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 932412.777581,
+      "min": 926418.118409,
+      "max": 1028555.825239
+    },
+    "latency_mean_ns": {
+      "median": 5500812.732,
+      "min": 5472000.565,
+      "max": 6077465.417
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 11534336
+    },
+    "budget_waits": {
+      "median": 1395,
+      "min": 1286,
+      "max": 1421
+    },
+    "allocations": {
+      "median": 1345,
+      "min": 1332,
+      "max": 1353
+    },
+    "reuses": {
+      "median": 703,
+      "min": 695,
+      "max": 716
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 191836517,
+      "min": 191114147,
+      "max": 205803459
+    },
+    "cpu_ns": {
+      "median": 62332245,
+      "min": 60306782,
+      "max": 87522857
+    },
+    "peak_reserved_bytes": {
+      "median": 2097152,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 347142.858576,
+      "min": 345755.184019,
+      "max": 363428.263552
+    },
+    "latency_mean_ns": {
+      "median": 6069082.115,
+      "min": 6032302.559,
+      "max": 6356735.332
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 11534336
+    },
+    "budget_waits": {
+      "median": 1362,
+      "min": 1210,
+      "max": 1379
+    },
+    "allocations": {
+      "median": 2460,
+      "min": 2361,
+      "max": 2470
+    },
+    "reuses": {
+      "median": 1636,
+      "min": 1626,
+      "max": 1735
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 190661223,
+      "min": 190230224,
+      "max": 215534802
+    },
+    "cpu_ns": {
+      "median": 60180004,
+      "min": 58883103,
+      "max": 92135979
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 53727440,
+      "min": 53727440,
+      "max": 53727440
+    },
+    "active_byte_seconds": {
+      "median": 345094.680154,
+      "min": 344486.353015,
+      "max": 387556.898349
+    },
+    "latency_mean_ns": {
+      "median": 6036141.159,
+      "min": 6020977.936,
+      "max": 6714221.641
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1379,
+      "min": 1179,
+      "max": 1383
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 190593723,
+      "min": 189684559,
+      "max": 194998211
+    },
+    "cpu_ns": {
+      "median": 62104383,
+      "min": 60109883,
+      "max": 80964449
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097152
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 28385168,
+      "min": 28385168,
+      "max": 28385168
+    },
+    "active_byte_seconds": {
+      "median": 346774.138471,
+      "min": 345575.615482,
+      "max": 352937.551048
+    },
+    "latency_mean_ns": {
+      "median": 6133228.412,
+      "min": 6110993.322,
+      "max": 6209271.27
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1387,
+      "min": 1251,
+      "max": 1401
+    },
+    "allocations": {
+      "median": 2377,
+      "min": 2265,
+      "max": 2383
+    },
+    "reuses": {
+      "median": 1398,
+      "min": 1392,
+      "max": 1510
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 176712466,
+      "min": 175293210,
+      "max": 191006927
+    },
+    "cpu_ns": {
+      "median": 57346839,
+      "min": 56768485,
+      "max": 80024226
+    },
+    "peak_reserved_bytes": {
+      "median": 2097120,
+      "min": 2097120,
+      "max": 2097120
+    },
+    "peak_active_bytes": {
+      "median": 2097120,
+      "min": 2097120,
+      "max": 2097120
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 329327.109037,
+      "min": 326483.546647,
+      "max": 354343.266259
+    },
+    "latency_mean_ns": {
+      "median": 6344282.023,
+      "min": 6283898.527,
+      "max": 6749781.49
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1308,
+      "min": 1164,
+      "max": 1313
+    },
+    "allocations": {
+      "median": 1722,
+      "min": 1659,
+      "max": 1727
+    },
+    "reuses": {
+      "median": 326,
+      "min": 321,
+      "max": 389
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 188885136,
+      "min": 187864582,
+      "max": 218109869
+    },
+    "cpu_ns": {
+      "median": 63904326,
+      "min": 60112693,
+      "max": 94383237
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 28479696,
+      "min": 28479696,
+      "max": 28479696
+    },
+    "active_byte_seconds": {
+      "median": 342822.067006,
+      "min": 341567.414808,
+      "max": 394831.364885
+    },
+    "latency_mean_ns": {
+      "median": 6121880.805,
+      "min": 6102214.292,
+      "max": 7013746.965
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 8388608,
+      "max": 14680064
+    },
+    "budget_waits": {
+      "median": 1390,
+      "min": 1166,
+      "max": 1411
+    },
+    "allocations": {
+      "median": 2356,
+      "min": 2188,
+      "max": 2384
+    },
+    "reuses": {
+      "median": 1432,
+      "min": 1404,
+      "max": 1600
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 226008956,
+      "min": 224500368,
+      "max": 240539157
+    },
+    "cpu_ns": {
+      "median": 64169718,
+      "min": 61534673,
+      "max": 82888986
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097136,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097104,
+      "min": 2097104,
+      "max": 2097104
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 11229392,
+      "min": 11229392,
+      "max": 11229392
+    },
+    "active_byte_seconds": {
+      "median": 414911.228869,
+      "min": 412262.960044,
+      "max": 437508.612236
+    },
+    "latency_mean_ns": {
+      "median": 5866464.096,
+      "min": 5837746.733,
+      "max": 6115847.212
+    },
+    "latency_p99_upper_ns": {
+      "median": 8388608,
+      "min": 7864320,
+      "max": 9437184
+    },
+    "budget_waits": {
+      "median": 1452,
+      "min": 1333,
+      "max": 1465
+    },
+    "allocations": {
+      "median": 2125,
+      "min": 2037,
+      "max": 2145
+    },
+    "reuses": {
+      "median": 1280,
+      "min": 1260,
+      "max": 1368
+    }
+  },
+  {
+    "case": "mixed_tight",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 284454034,
+      "min": 282084485,
+      "max": 315263040
+    },
+    "cpu_ns": {
+      "median": 68644342,
+      "min": 66066433,
+      "max": 90750328
+    },
+    "peak_reserved_bytes": {
+      "median": 2097136,
+      "min": 2097120,
+      "max": 2097136
+    },
+    "peak_active_bytes": {
+      "median": 2097136,
+      "min": 2097120,
+      "max": 2097136
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 3824848,
+      "min": 3824848,
+      "max": 3824848
+    },
+    "active_byte_seconds": {
+      "median": 523909.294385,
+      "min": 520410.956771,
+      "max": 579371.042178
+    },
+    "latency_mean_ns": {
+      "median": 5707951.51,
+      "min": 5671193.431,
+      "max": 6291155.426
+    },
+    "latency_p99_upper_ns": {
+      "median": 7340032,
+      "min": 7340032,
+      "max": 13631488
+    },
+    "budget_waits": {
+      "median": 1386,
+      "min": 1248,
+      "max": 1398
+    },
+    "allocations": {
+      "median": 1983,
+      "min": 1890,
+      "max": 1992
+    },
+    "reuses": {
+      "median": 1073,
+      "min": 1064,
+      "max": 1166
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21555643,
+      "min": 20408294,
+      "max": 25754576
+    },
+    "cpu_ns": {
+      "median": 21467723,
+      "min": 20408999,
+      "max": 25674260
+    },
+    "peak_reserved_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "peak_active_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1339.691796,
+      "min": 1265.057763,
+      "max": 1611.048102
+    },
+    "latency_mean_ns": {
+      "median": 10366.948,
+      "min": 9812.079,
+      "max": 12408.192
+    },
+    "latency_p99_upper_ns": {
+      "median": 18432,
+      "min": 13312,
+      "max": 20480
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21065681,
+      "min": 20744256,
+      "max": 40643311
+    },
+    "cpu_ns": {
+      "median": 21006279,
+      "min": 20744722,
+      "max": 40589351
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1124.320165,
+      "min": 1107.901257,
+      "max": 2334.403772
+    },
+    "latency_mean_ns": {
+      "median": 10139.793,
+      "min": 9979.793,
+      "max": 19667.254
+    },
+    "latency_p99_upper_ns": {
+      "median": 15360,
+      "min": 13312,
+      "max": 49152
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21725958,
+      "min": 21132162,
+      "max": 30675302
+    },
+    "cpu_ns": {
+      "median": 21582704,
+      "min": 21048817,
+      "max": 30605147
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1159.292471,
+      "min": 1121.783606,
+      "max": 1690.623657
+    },
+    "latency_mean_ns": {
+      "median": 10452.028,
+      "min": 10163.675,
+      "max": 14792.559
+    },
+    "latency_p99_upper_ns": {
+      "median": 16384,
+      "min": 15360,
+      "max": 36864
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 23241749,
+      "min": 20554720,
+      "max": 28270087
+    },
+    "cpu_ns": {
+      "median": 23003312,
+      "min": 20527722,
+      "max": 28259741
+    },
+    "peak_reserved_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "peak_active_bytes": {
+      "median": 156112,
+      "min": 156112,
+      "max": 156112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1441.524009,
+      "min": 1273.955005,
+      "max": 1772.014643
+    },
+    "latency_mean_ns": {
+      "median": 11135.177,
+      "min": 9881.978,
+      "max": 13635.652
+    },
+    "latency_p99_upper_ns": {
+      "median": 20480,
+      "min": 13312,
+      "max": 24576
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 22216122,
+      "min": 21766957,
+      "max": 25768428
+    },
+    "cpu_ns": {
+      "median": 22202889,
+      "min": 21732111,
+      "max": 25607575
+    },
+    "peak_reserved_bytes": {
+      "median": 90640,
+      "min": 90640,
+      "max": 90640
+    },
+    "peak_active_bytes": {
+      "median": 90640,
+      "min": 90640,
+      "max": 90640
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 1.688434,
+      "min": 1.653919,
+      "max": 1.971383
+    },
+    "latency_mean_ns": {
+      "median": 10698.669,
+      "min": 10483.601,
+      "max": 12427.336
+    },
+    "latency_p99_upper_ns": {
+      "median": 16384,
+      "min": 13312,
+      "max": 22528
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 1,
+      "min": 1,
+      "max": 1
+    },
+    "reuses": {
+      "median": 2047,
+      "min": 2047,
+      "max": 2047
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 21328570,
+      "min": 20854404,
+      "max": 27294793
+    },
+    "cpu_ns": {
+      "median": 21275351,
+      "min": 20822149,
+      "max": 27138353
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1144.526904,
+      "min": 1108.309428,
+      "max": 1515.562825
+    },
+    "latency_mean_ns": {
+      "median": 10266.949,
+      "min": 10030.324,
+      "max": 13171.363
+    },
+    "latency_p99_upper_ns": {
+      "median": 15360,
+      "min": 14336,
+      "max": 28672
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 22839176,
+      "min": 20961885,
+      "max": 28395383
+    },
+    "cpu_ns": {
+      "median": 22457056,
+      "min": 20931648,
+      "max": 28350296
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1227.172318,
+      "min": 1117.500277,
+      "max": 1583.182193
+    },
+    "latency_mean_ns": {
+      "median": 10958.209,
+      "min": 10087.398,
+      "max": 13707.471
+    },
+    "latency_p99_upper_ns": {
+      "median": 20480,
+      "min": 13312,
+      "max": 26624
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_fast",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 22601085,
+      "min": 20540535,
+      "max": 33207148
+    },
+    "cpu_ns": {
+      "median": 22218814,
+      "min": 20499501,
+      "max": 33180296
+    },
+    "peak_reserved_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "peak_active_bytes": {
+      "median": 156192,
+      "min": 156192,
+      "max": 156192
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 1220.513584,
+      "min": 1100.863361,
+      "max": 1873.802277
+    },
+    "latency_mean_ns": {
+      "median": 10886.611,
+      "min": 9884.486,
+      "max": 16048.501
+    },
+    "latency_p99_upper_ns": {
+      "median": 28672,
+      "min": 13312,
+      "max": 36864
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 2,
+      "min": 2,
+      "max": 2
+    },
+    "reuses": {
+      "median": 4094,
+      "min": 4094,
+      "max": 4094
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "borrow",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 122707360,
+      "min": 101576920,
+      "max": 132106520
+    },
+    "cpu_ns": {
+      "median": 46471284,
+      "min": 45409725,
+      "max": 50248602
+    },
+    "peak_reserved_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "peak_active_bytes": {
+      "median": 8350112,
+      "min": 8350112,
+      "max": 8350112
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 963195.592926,
+      "min": 784884.708981,
+      "max": 1041796.843202
+    },
+    "latency_mean_ns": {
+      "median": 7210177.487,
+      "min": 5868549.98,
+      "max": 7801228.044
+    },
+    "latency_p99_upper_ns": {
+      "median": 9437184,
+      "min": 9437184,
+      "max": 10485760
+    },
+    "budget_waits": {
+      "median": 1334,
+      "min": 825,
+      "max": 1532
+    },
+    "allocations": {
+      "median": 126,
+      "min": 126,
+      "max": 126
+    },
+    "reuses": {
+      "median": 1922,
+      "min": 1922,
+      "max": 1922
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 155007270,
+      "min": 153170646,
+      "max": 160896124
+    },
+    "cpu_ns": {
+      "median": 25740442,
+      "min": 24156681,
+      "max": 48121065
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6585.869234,
+      "min": 6504.184345,
+      "max": 7879.414446
+    },
+    "latency_mean_ns": {
+      "median": 33274854.653,
+      "min": 32718961.288,
+      "max": 34942676.828
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 50331648
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "copy_no_pool",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154586382,
+      "min": 154143199,
+      "max": 164046264
+    },
+    "cpu_ns": {
+      "median": 24703970,
+      "min": 24004931,
+      "max": 46944898
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6526.934401,
+      "min": 6483.552028,
+      "max": 8459.440246
+    },
+    "latency_mean_ns": {
+      "median": 33387730.27,
+      "min": 33287028.642,
+      "max": 35133900.267
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 46137344
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 4096,
+      "min": 4096,
+      "max": 4096
+    },
+    "reuses": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "pressure",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 151522021,
+      "min": 151398447,
+      "max": 170735523
+    },
+    "cpu_ns": {
+      "median": 27174295,
+      "min": 26713792,
+      "max": 36085789
+    },
+    "peak_reserved_bytes": {
+      "median": 4321888,
+      "min": 4321888,
+      "max": 4321888
+    },
+    "peak_active_bytes": {
+      "median": 4316448,
+      "min": 4316128,
+      "max": 4317248
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 113152,
+      "min": 113024,
+      "max": 113408
+    },
+    "active_byte_seconds": {
+      "median": 545315.69968,
+      "min": 535707.02646,
+      "max": 624641.105995
+    },
+    "latency_mean_ns": {
+      "median": 32398179.535,
+      "min": 32391902.953,
+      "max": 37128525.741
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 50331648
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 514,
+      "min": 514,
+      "max": 514
+    },
+    "reuses": {
+      "median": 3302,
+      "min": 3300,
+      "max": 3306
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "project",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154766567,
+      "min": 154024996,
+      "max": 157789596
+    },
+    "cpu_ns": {
+      "median": 25290252,
+      "min": 24892483,
+      "max": 25739163
+    },
+    "peak_reserved_bytes": {
+      "median": 131520,
+      "min": 131520,
+      "max": 131520
+    },
+    "peak_active_bytes": {
+      "median": 131520,
+      "min": 131520,
+      "max": 131520
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "active_byte_seconds": {
+      "median": 5470.365986,
+      "min": 5441.502377,
+      "max": 5595.217111
+    },
+    "latency_mean_ns": {
+      "median": 33388895.003,
+      "min": 33212736.419,
+      "max": 34150955.425
+    },
+    "latency_p99_upper_ns": {
+      "median": 41943040,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 512,
+      "min": 512,
+      "max": 512
+    },
+    "reuses": {
+      "median": 1536,
+      "min": 1536,
+      "max": 1536
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold2",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154790882,
+      "min": 154125217,
+      "max": 183186784
+    },
+    "cpu_ns": {
+      "median": 24321563,
+      "min": 24092354,
+      "max": 47779812
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6519.648368,
+      "min": 6508.096109,
+      "max": 8175.636446
+    },
+    "latency_mean_ns": {
+      "median": 33288663.865,
+      "min": 31414916.006,
+      "max": 39799236.839
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 54525952
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold4",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154103699,
+      "min": 152733814,
+      "max": 154495679
+    },
+    "cpu_ns": {
+      "median": 24603184,
+      "min": 23694419,
+      "max": 52980104
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6514.197106,
+      "min": 6485.074292,
+      "max": 7602.229051
+    },
+    "latency_mean_ns": {
+      "median": 33271036.464,
+      "min": 30324683.181,
+      "max": 33331969.71
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 54525952
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  },
+  {
+    "case": "sparse_slow",
+    "variant": "threshold8",
+    "samples": 5,
+    "elapsed_ns": {
+      "median": 154268606,
+      "min": 154242976,
+      "max": 161984455
+    },
+    "cpu_ns": {
+      "median": 24028565,
+      "min": 23936885,
+      "max": 35308455
+    },
+    "peak_reserved_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "peak_active_bytes": {
+      "median": 197072,
+      "min": 197072,
+      "max": 197072
+    },
+    "rss_peak_bytes": {
+      "median": 28753920,
+      "min": 28753920,
+      "max": 28753920
+    },
+    "copy_bytes": {
+      "median": 131072,
+      "min": 131072,
+      "max": 131072
+    },
+    "active_byte_seconds": {
+      "median": 6509.096995,
+      "min": 6499.765006,
+      "max": 7196.657649
+    },
+    "latency_mean_ns": {
+      "median": 33299370.61,
+      "min": 33265597.392,
+      "max": 34734342.366
+    },
+    "latency_p99_upper_ns": {
+      "median": 37748736,
+      "min": 37748736,
+      "max": 41943040
+    },
+    "budget_waits": {
+      "median": 0,
+      "min": 0,
+      "max": 0
+    },
+    "allocations": {
+      "median": 513,
+      "min": 513,
+      "max": 513
+    },
+    "reuses": {
+      "median": 3583,
+      "min": 3583,
+      "max": 3583
+    }
+  }
+]
diff --git a/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/verification.json b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/verification.json
new file mode 100644
index 0000000..60f0b18
--- /dev/null
+++ b/research/experiments/002-buffer-retention/results/2026-09-22-linux-aarch64/verification.json
@@ -0,0 +1,92 @@
+{
+  "native": [
+    "borrow: byte equality, accounting, cleanup, slow=False",
+    "borrow: byte equality, accounting, cleanup, slow=True",
+    "borrow: six malformed inputs with pending buffer cleanup",
+    "borrow: cancellation preserves completed output prefix and releases pending buffers",
+    "borrow: empty stream",
+    "copy: byte equality, accounting, cleanup, slow=False",
+    "copy: byte equality, accounting, cleanup, slow=True",
+    "copy: six malformed inputs with pending buffer cleanup",
+    "copy: cancellation preserves completed output prefix and releases pending buffers",
+    "copy: empty stream",
+    "threshold2: byte equality, accounting, cleanup, slow=False",
+    "threshold2: byte equality, accounting, cleanup, slow=True",
+    "threshold2: six malformed inputs with pending buffer cleanup",
+    "threshold2: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold2: empty stream",
+    "threshold4: byte equality, accounting, cleanup, slow=False",
+    "threshold4: byte equality, accounting, cleanup, slow=True",
+    "threshold4: six malformed inputs with pending buffer cleanup",
+    "threshold4: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold4: empty stream",
+    "threshold8: byte equality, accounting, cleanup, slow=False",
+    "threshold8: byte equality, accounting, cleanup, slow=True",
+    "threshold8: six malformed inputs with pending buffer cleanup",
+    "threshold8: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold8: empty stream",
+    "pressure: byte equality, accounting, cleanup, slow=False",
+    "pressure: byte equality, accounting, cleanup, slow=True",
+    "pressure: six malformed inputs with pending buffer cleanup",
+    "pressure: cancellation preserves completed output prefix and releases pending buffers",
+    "pressure: empty stream",
+    "project: byte equality, accounting, cleanup, slow=False",
+    "project: byte equality, accounting, cleanup, slow=True",
+    "project: six malformed inputs with pending buffer cleanup",
+    "project: cancellation preserves completed output prefix and releases pending buffers",
+    "project: empty stream",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=False",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=True",
+    "copy_no_pool: six malformed inputs with pending buffer cleanup",
+    "copy_no_pool: cancellation preserves completed output prefix and releases pending buffers",
+    "copy_no_pool: empty stream",
+    "frame larger than buffer budget: bounded refusal versus projection",
+    "real output failure through /dev/full, pending buffers released",
+    "SIGTERM interrupts delayed sink and releases buffers"
+  ],
+  "asan_ubsan": [
+    "borrow: byte equality, accounting, cleanup, slow=False",
+    "borrow: byte equality, accounting, cleanup, slow=True",
+    "borrow: six malformed inputs with pending buffer cleanup",
+    "borrow: cancellation preserves completed output prefix and releases pending buffers",
+    "borrow: empty stream",
+    "copy: byte equality, accounting, cleanup, slow=False",
+    "copy: byte equality, accounting, cleanup, slow=True",
+    "copy: six malformed inputs with pending buffer cleanup",
+    "copy: cancellation preserves completed output prefix and releases pending buffers",
+    "copy: empty stream",
+    "threshold2: byte equality, accounting, cleanup, slow=False",
+    "threshold2: byte equality, accounting, cleanup, slow=True",
+    "threshold2: six malformed inputs with pending buffer cleanup",
+    "threshold2: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold2: empty stream",
+    "threshold4: byte equality, accounting, cleanup, slow=False",
+    "threshold4: byte equality, accounting, cleanup, slow=True",
+    "threshold4: six malformed inputs with pending buffer cleanup",
+    "threshold4: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold4: empty stream",
+    "threshold8: byte equality, accounting, cleanup, slow=False",
+    "threshold8: byte equality, accounting, cleanup, slow=True",
+    "threshold8: six malformed inputs with pending buffer cleanup",
+    "threshold8: cancellation preserves completed output prefix and releases pending buffers",
+    "threshold8: empty stream",
+    "pressure: byte equality, accounting, cleanup, slow=False",
+    "pressure: byte equality, accounting, cleanup, slow=True",
+    "pressure: six malformed inputs with pending buffer cleanup",
+    "pressure: cancellation preserves completed output prefix and releases pending buffers",
+    "pressure: empty stream",
+    "project: byte equality, accounting, cleanup, slow=False",
+    "project: byte equality, accounting, cleanup, slow=True",
+    "project: six malformed inputs with pending buffer cleanup",
+    "project: cancellation preserves completed output prefix and releases pending buffers",
+    "project: empty stream",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=False",
+    "copy_no_pool: byte equality, accounting, cleanup, slow=True",
+    "copy_no_pool: six malformed inputs with pending buffer cleanup",
+    "copy_no_pool: cancellation preserves completed output prefix and releases pending buffers",
+    "copy_no_pool: empty stream",
+    "frame larger than buffer budget: bounded refusal versus projection",
+    "real output failure through /dev/full, pending buffers released",
+    "SIGTERM interrupts delayed sink and releases buffers"
+  ]
+}