[issue17385] Use deque instead of list the threading.Condition waiter queue

[Roundup Robot]

Roundup Robot added the comment:

New changeset 0f86b51f8f8b by Raymond Hettinger in branch 'default':
Issue #17385: Fix quadratic behavior in threading.Condition
http://hg.python.org/cpython/rev/0f86b51f8f8b

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nosy: +python-dev

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<http://bugs.python.org/issue17385>
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