[issue31336] Speed up _PyType_Lookup() for class creation

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

After adding PyErr_Clear() the benefit of this optimization is smaller. Only 8% on my 64-bit computer. And no any effect on 32-bit. I wounder if it is worth to complicate the code for such small benefit. For non-empty classes the relative benefit is even smaller. Maybe there are other opportunities for optimization?

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