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perf_hooks: complete overhaul of the implementation #37136

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Closed

perf_hooks: complete overhaul of the implementation #37136

wants to merge 1 commit into from

Commits on Feb 22, 2021

  1. perf_hooks: complete overhaul of the implementation 

    * Update the user timing implementation to conform to
  User Timing Level 3.
* Reimplement user timing and timerify with pure JavaScript
  implementations
* Simplify the C++ implementation for gc and http2 perf
* Runtime deprecate additional perf entry properties
  in favor of the standard detail argument
* Disable the `buffered` option on PerformanceObserver,
  all entries are queued and dispatched on setImmediate.
  Only entries with active observers are buffered.
* This does remove the user timing and timerify
  trace events. Because the trace_events are still
  considered experimental, those can be removed without
  a deprecation cycle. They are removed to improve
  performance and reduce complexity.

Old: `perf_hooks/usertiming.js n=100000: 92,378.01249733355`
New: perf_hooks/usertiming.js n=100000: 270,393.5280638482`
    @jasnell
    jasnell committed Feb 22, 2021
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