Measure how long an app changing module cannot answer, against a host restart (030)

An app of a million items (a list grown by doubling) or of a thousand, in
a host of apps, its store in RAM: the longest gap between two answered
writes while it changes module on SIGHUP (stopped and started again from
its store, 71e319b), and while the host is restarted. A thousand items:
1.59 ms against 3.05 (median of 20 and 10). A million: 150.64 ms against
149.73 (10 and 5): both are the store read again (pure_app_start, 142
ms), so changing does not answer sooner than restarting.

1 files changed, 16 insertions, 0 deletions

diff --git a/research/experiments/030-app-lifecycle/2026-10-04-window-stop-start-1000000.jsonl b/research/experiments/030-app-lifecycle/2026-10-04-window-stop-start-1000000.jsonl
new file mode 100644
index 0000000..03e5ee2
--- /dev/null
+++ b/research/experiments/030-app-lifecycle/2026-10-04-window-stop-start-1000000.jsonl
@@ -0,0 +1,16 @@
+{"items": 1048576, "way": "changed", "gap_ms": 150.55, "reading_ms": 150.51}
+{"items": 1048576, "way": "changed", "gap_ms": 151.01, "reading_ms": 151.01}
+{"items": 1048576, "way": "changed", "gap_ms": 150.65, "reading_ms": 150.67}
+{"items": 1048576, "way": "changed", "gap_ms": 149.57, "reading_ms": 149.55}
+{"items": 1048576, "way": "changed", "gap_ms": 150.7, "reading_ms": 150.72}
+{"items": 1048576, "way": "changed", "gap_ms": 151.16, "reading_ms": 151.22}
+{"items": 1048576, "way": "changed", "gap_ms": 150.62, "reading_ms": 150.66}
+{"items": 1048576, "way": "changed", "gap_ms": 150.63, "reading_ms": 150.6}
+{"items": 1048576, "way": "changed", "gap_ms": 150.93, "reading_ms": 150.95}
+{"items": 1048576, "way": "changed", "gap_ms": 150.11, "reading_ms": 150.11}
+{"items": 1048576, "way": "restarted", "gap_ms": 149.9}
+{"items": 1048576, "way": "restarted", "gap_ms": 148.92}
+{"items": 1048576, "way": "restarted", "gap_ms": 149.04}
+{"items": 1048576, "way": "restarted", "gap_ms": 149.73}
+{"items": 1048576, "way": "restarted", "gap_ms": 150.4}
+{"items": 1048576, "changed_median_ms": 150.64, "restarted_median_ms": 149.73, "refused": 18720, "answered": 33810}