[issue21233] Add *Calloc functions to CPython memory allocation API

[STINNER Victor]

STINNER Victor added the comment:

> The real use case I envision is with huge powers of two.

I'm not sure that it's a common use case, but it can be nice to optimize this case if it doesn't make longobject.c more complex. It looks like calloc() becomes interesting for objects larger than 1 MB.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21233>
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