[issue24483] Avoid repeated hash calculation in C implementation of functools.lru_cache()

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

New patch adds _PyDict_DelItem_KnownHash() and uses it to guarantee that the hash is only calculated once.

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Added file: http://bugs.python.org/file39761/clru_cache_known_hash_2.patch

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<http://bugs.python.org/issue24483>
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