[issue2607] why is (default)dict so slow on tuples???

[Alexander Belopolsky]

Alexander Belopolsky <belopolsky at users.sourceforge.net> added the comment:

My guess is that this is due to the fact that strings cache their hash
values while tuples don't.  IIRC, caching tuple's hash values has been
proposed and rejected some time ago.  Furthermore, dict lookups are
heavily optimized for the case when all keys are strings.

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nosy: +belopolsky

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