[issue31336] Speed up _PyType_Lookup() for class creation

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Could you please provide benchmarks that you used?

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nosy: +serhiy.storchaka
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31336>
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