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
an easy
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
