[issue34767] Optimize asyncio.Lock

[Yury Selivanov]

New submission from Yury Selivanov <yselivanov at gmail.com>:

There's no point in always creating a deque() for waiters in Lock.__init__.  Not all locks end up using waiters.

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components: asyncio
messages: 325997
nosy: asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: Optimize asyncio.Lock
type: enhancement
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34767>
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