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                                            Peter Marshall

This lib seems to block event loop

Yes it's expected that `CpuProfiler::StartProfiling` takes a few hundred ms, we've seen that before for big sites e.g. facebook.com. I am pretty sure the slow part is where we iterate...

This lib seems to block event loop

Here is a repro just in V8 tests BTW: https://chromium-review.googlesource.com/c/v8/v8/+/2366695 Profiler startup takes ~4.8 seconds with 500k functions on the heap

setTimeout is attributed to the file in which it is called.

Is the expected result that it shows up in node/lib/timers.js where this is implemented?