diff options
Diffstat (limited to 'doc/api/perf_hooks.md')
| -rw-r--r-- | doc/api/perf_hooks.md | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/api/perf_hooks.md b/doc/api/perf_hooks.md index 267d71344bb..bb22c09fddd 100644 --- a/doc/api/perf_hooks.md +++ b/doc/api/perf_hooks.md @@ -72,8 +72,11 @@ added: The `eventLoopUtilization()` method returns an object that contains the cumulative duration of time the event loop has been both idle and active as a high resolution milliseconds timer. The `utilization` value is the calculated -Event Loop Utilization (ELU). If bootstrapping has not yet finished, the -properties have the value of `0`. +Event Loop Utilization (ELU). + +If bootstrapping has not yet finished on the main thread the properties have +the value of `0`. The ELU is immediately available on [Worker threads][] since +bootstrap happens within the event loop. Both `utilization1` and `utilization2` are optional parameters. @@ -766,6 +769,7 @@ require('some-module'); [Performance Timeline]: https://w3c.github.io/performance-timeline/ [User Timing]: https://www.w3.org/TR/user-timing/ [Web Performance APIs]: https://w3c.github.io/perf-timing-primer/ +[Worker threads]: worker_threads.md#worker_threads_worker_threads [`'exit'`]: process.md#process_event_exit [`child_process.spawnSync()`]: child_process.md#child_process_child_process_spawnsync_command_args_options [`process.hrtime()`]: process.md#process_process_hrtime_time |