perf_hooks: only enable GC tracking when it's requested #25853
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Previously a GC prologue callback and a GC epilogue callback are always unconditionally enabled during bootstrap when the `performance` binding is loaded, even when the user does not use the performance timeline API to enable GC tracking. This patch makes the callback addition conditional and only enables them when the user explicitly requests `observer.observe(['gc'])` to avoid the overhead.
devsnek
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Jan 31, 2019
jasnell
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Jan 31, 2019
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There were infra failures in the previous CI. New one: https://ci.nodejs.org/job/node-test-pull-request/20498/ |
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addaleax
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Feb 6, 2019
Previously a GC prologue callback and a GC epilogue callback are always unconditionally enabled during bootstrap when the `performance` binding is loaded, even when the user does not use the performance timeline API to enable GC tracking. This patch makes the callback addition conditional and only enables them when the user explicitly requests `observer.observe(['gc'])` to avoid the overhead. PR-URL: #25853 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: James M Snell <jasnell@gmail.com>
addaleax
pushed a commit
that referenced
this pull request
Feb 6, 2019
Previously a GC prologue callback and a GC epilogue callback are always unconditionally enabled during bootstrap when the `performance` binding is loaded, even when the user does not use the performance timeline API to enable GC tracking. This patch makes the callback addition conditional and only enables them when the user explicitly requests `observer.observe(['gc'])` to avoid the overhead. PR-URL: #25853 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: James M Snell <jasnell@gmail.com>
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This was referenced Feb 15, 2019
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Previously a GC prologue callback and a GC epilogue callback
are always unconditionally enabled during bootstrap when
the
performancebinding is loaded, even when the user doesnot use the performance timeline API to enable GC tracking.
This patch makes the callback addition conditional and only
enables them when the user explicitly requests
observer.observe(['gc'])to avoid the overhead.Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes