Look for potential false-positives

[naugtur]

This library is not exactly what async hooks were designed for. While it's working for a few cases I investigated, there might be some edge cases out there. The worst case scenario being a false positive, where it'd report a function that's not blocking the event loop.

This needs some investigation.

If you're using this library, feel free to discuss examples of functions it detected.

[yocontra]

I'm noticing quite a few false positives using babel w/ async await. I think it detects awaiting a function as blocking the loop, not 100% sure.

[naugtur]

Interesting... async await should be handled internally by the same hook implementation as promises.
Could you share a simple case to reproduce? I could look into it and if it's not my bug, pass it on to other guys in diagnostics WG.

[pazguille]

Hey @naugtur. I'm noticing a few false positives when I'm using Promises.

[naugtur]

I'm looking forward to gists with examples or failing testcase contributions. My daughter is born in ~2 weeks and my opensource time budget won't allow tracking this down on my own.

[naugtur]

Pushed v1.1.0 where I introduced a simple countermeasure for false positives.
Still don't have a good false-positive example to put in tests.

Please check if you see a change in behavior when toggling trimFalsePositives option. I want to test it reasonably before I switch it on by default and bump to v2.0.0.