1,577 machine instructions a code point, 48,284 samples

by mechanism:
       660   41.9%  unknown
       375   23.8%  list build
       249   15.8%  memory
       178   11.3%  event
        45    2.9%  dispatch
        44    2.8%  compute
        18    1.2%  list read
         4    0.2%  moves
         2    0.1%  loop

in step(), by the case its line is in (code the compiler shares between cases goes to one of them):
        47  LIST_APPEND
        45  (fetch, decode)
        39  TEXT_INSERT
        13  BYTES_OF
         5  TEXT_REMOVE
         4  CONST
         1  FLOORDIV

outside step(), by function as linked:
       127  ??
       121  arrays_free
        96  free
        88  place
        79  decode_cell
        79  pure_list_insert
        77  message
        57  malloc
        52  __default_morecore
        49  pure_list_read
        47  prepare_extras
        37  __xpg_strerror_r
        35  clear_rows
        34  open_burst
        30  pure_list_clear
        25  pure_list_settle
        23  chunk_bytes
        23  own
        22  sum
        20  mark_event
        20  run_batches
        19  collect
        19  pure_list_changes
        19  sum_path
        18  close_burst
        14  put_cells
        14  descend
        14  add_node
        13  let_go_tree
        12  timer_settime

no mechanism:
        67  ?? (where:0) < ??
        61  ?? (??:0) < ??
        50  decode_cell (module-list.c:2132) < decode_cell
        45  prepare_extras (module-list.c:625) < prepare_extras
        26  decode_item (module-list.c:2344) < pure_list_read
        13  move_items (module-list.c:337) < place
        13  decode_cell (module-list.c:2130) < decode_cell
        12  place (module-list.c:729) < place
        12  sum_path (module-list.c:591) < sum_path
        11  place (module-list.c:689) < place
         9  own (module-list.c:563) < own
         9  own (module-list.c:552) < own
         8  pure_list_read (module-list.c:2358) < pure_list_read
         8  run_batches (module.c:4968) < run_batches
         8  release_extras (module-list.c:673) < place
         8  pure_draft_size (store-tree.c:1530) < pure_draft_size
         8  pure_draft_version (store-tree.c:1584) < pure_draft_version
         8  place (module-list.c:682) < place
         8  chunk_bytes (store-tree.c:615) < chunk_bytes
         7  sum (module-list.c:511) < sum