[issue27128] Add _PyObject_FastCall()

[STINNER Victor]

STINNER Victor added the comment:

> FYI: I copied your (no-kwargs) implementation over into Cython and I get around 17% faster calls to Python functions with 2 positional arguments.

Hey, cool! It's always cool to get performance enhancement without having to break the C API nor having to modify source code :-)

What do you mean by "I copied your (no-kwargs) implementation"? The whole giant patch? Or just a few changes? Which changes?

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<http://bugs.python.org/issue27128>
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