New submission from Jimmy Lai <yuri...@gmail.com>:
`ensure_future` converts the input as future if it's not already a future.
The condition is the following:
if futures.isfuture(coro_or_future):
...
elif coroutines.iscoroutine(coro_or_future):
...
elif inspect.isawaitable(coro_or_future):
...
In real world, `ensure_future` is mostly called by `run_until_complete` and
gather with async function call (coroutine) as input.
We should check `iscoroutine` first to make it most efficient.
----------
components: asyncio
messages: 316572
nosy: asvetlov, jimmylai, yselivanov
priority: normal
severity: normal
status: open
title: Optimize asyncio.ensure_future by reordering if conditions
type: performance
versions: Python 3.6, Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33505>
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