[issue32351] Use fastpath in asyncio.sleep if delay<0

[Andrew Svetlov]

New submission from Andrew Svetlov <andrew.svetlov at gmail.com>:

Currently asyncio.sleep schedules a callback execution by `loop.call_later()` call, which has the same behavior but 2x slower.

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components: Library (Lib), asyncio
messages: 308487
nosy: asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Use fastpath in asyncio.sleep if delay<0
versions: Python 3.7

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32351>
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