[issue28600] asyncio: Optimize loop.call_soon

[Yury Selivanov]

Yury Selivanov added the comment:

> IIRC haypo added the check because people called `.call_later()` with coroutine instead of callback very often.

We'll update asyncio docs in 3.6 with a tutorial to focus on coroutines (not on low-level event loop).  This should leave the loop API to advanced users.

> But checking in debug mode looks very reasonable to me if it is so expensive.

Exactly.

----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue28600>
_______________________________________