[issue33221] Add stats for asyncio task usage.

[Joongi Kim]

Joongi Kim <me at daybreaker.info> added the comment:

I like trio-style instrumentation API because it could be used for more generic purposes, not only for statistics.

This stats or instrumentation API will greatly help me to utilize external monitoring services such as Datadog in my production deployments.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33221>
_______________________________________