Antoine Pitrou <pit...@free.fr> added the comment:

> I recommend that __hash__ should use functools.lru_cache for caching.

Why would you do such a thing? A hash value is a single 64-bit slot, no need to 
add the memory consumption of a whole dictionary and the runtime cost of a LRU 
eviction policy when you can simply cache the hash in the object itself (like 
we already do for strings)...

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nosy: +pitrou

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14478>
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