[issue31096] asyncio.stream.FlowControlMixin._drain_helper may lead to a blocking behavior

Yury Selivanov added the comment: Documenting this would be a great first step. -- ___ Python tracker ___

[issue31096] asyncio.stream.FlowControlMixin._drain_helper may lead to a blocking behavior

Dmitry Malinovsky added the comment: I've changed the implementation significantly since August 2017, futures are not involved anymore so please ignore that part. However, such drain behavior is still present - but I don't think anymore that yielding to the event loop is

[issue31096] asyncio.stream.FlowControlMixin._drain_helper may lead to a blocking behavior

Yury Selivanov added the comment: Andrew, what are your thoughts on this one? -- nosy: +asvetlov versions: +Python 3.8 -Python 3.5, Python 3.6 ___ Python tracker

[issue31096] asyncio.stream.FlowControlMixin._drain_helper may lead to a blocking behavior

Change by Greg Lindahl : -- nosy: +wumpus ___ Python tracker ___ ___ Python-bugs-list

[issue31096] asyncio.stream.FlowControlMixin._drain_helper may lead to a blocking behavior

New submission from Dmitry Malinovsky: When there is a huge amount of `writer.write` calls followed by `await writer.drain()` on a non-paused channel, and there are no other coroutine switches, `await writer.drain()` immediately returns without a switch. This is because