Fix CPU profiler latency #1658
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Fix CPU profiler latency #1658
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The current profile must be stopped AFTER the next begins. This is because V8 will tear down the symbolizer thread when the active profile count reaches zero. This means the next profile started will spin up a new symbolizer thread. When this thread starts it streams in all the JIT location information which could block the JavaScript thread for a significant length of time.
rochdev
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Oct 25, 2021
rochdev
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Nov 2, 2021
The current profile must be stopped AFTER the next begins. This is because V8 will tear down the symbolizer thread when the active profile count reaches zero. This means the next profile started will spin up a new symbolizer thread. When this thread starts it streams in all the JIT location information which could block the JavaScript thread for a significant length of time.
rochdev
pushed a commit
that referenced
this pull request
Nov 2, 2021
The current profile must be stopped AFTER the next begins. This is because V8 will tear down the symbolizer thread when the active profile count reaches zero. This means the next profile started will spin up a new symbolizer thread. When this thread starts it streams in all the JIT location information which could block the JavaScript thread for a significant length of time.
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The current profile must be stopped AFTER the next begins. This is because V8 will tear down the symbolizer thread when the active profile count reaches zero. This means the next profile started will spin up a new symbolizer thread. When this thread starts it streams in all the JIT location information which could block the JavaScript thread for a significant length of time.