• kozyatinskiy's avatar
    [inspector] removed kDebugPromiseCollected event · 189ffd94
    kozyatinskiy authored
    With recent CLs we always store maximum N async stack traces and when we reach limit we drop half of them.
    Current promise collected event requires creating weak handle:
    - it takes time,
    - it consumes memory.
    Since async task id distribution for promises is uniform (each new promise has last_async_task_id + 1 as an id) our hash map is good enough to handle any amount of async task ids, following time of executing 1 000 000 000 of lookups:
    - for empty hash map: 1.45 seconds,
    - for hash map with one entry: 14.95 seconds
    - 1024 entries: 15.03 seconds
    - 1024 * 1024 entries: 14.82 seconds
    - 1024 * 1024 * 1024: 17.9 seconds
    
    BUG=v8:6189
    R=dgozman@chromium.org,yangguo@chromium.org
    
    Review-Url: https://codereview.chromium.org/2819423005
    Cr-Commit-Position: refs/heads/master@{#44750}
    189ffd94
debug.cc 88.5 KB