[issue46131] Add PyType_FastSubclass for float

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

It is because PyFloat_Check() and PyComplex_Check() are rarely used in comparison with checks for integers, strings, etc. The flags space is limited, so it is better to use it for something more important.

There were reasons for not adding such flags at first place and I think that they are still valid.

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nosy: +serhiy.storchaka

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