[issue29465] Add _PyObject_FastCall() to reduce stack consumption

[Roundup Robot]

Roundup Robot added the comment:

New changeset 31342913fb1e by Victor Stinner in branch 'default':
Fix PyCFunction_Call() performance issue
https://hg.python.org/cpython/rev/31342913fb1e

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nosy: +python-dev

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<http://bugs.python.org/issue29465>
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