Commits on Nov 9, 2022

1. worker: allow retrieving elu from parent …

   Usually, when extracting the ELU from a specific JS thread is better to
   do it from a different thread as the event loop we're observing might
   already be blocked. The `Worker.performance.eventLoopUtilization()`
   method allows us to do this for worker threads, but there's not a way
   to do this for the main thread. This new API, which allows us to
   retrieve the ELU of the parent thread from a specific worker, is going
   to enable this.
   
   For the moment, I have defined this new API in
   ```
   require('worker_threads').parent.performance.eventLoopUtilization()
   ```
   though I haven't added documentation yet as
   a) I want to know first whether this approach is acceptable, and in case
   it is,
   b) I'm not really sure whether that's the place the API should live in.
   Would love receiving feedback on this.

   

   santigimeno committed Nov 9, 2022
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