[issue26814] [WIP] Add a new _PyObject_FastCall() function which avoids the creation of a tuple or dict for arguments

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

I think you can simplify the patch by dropping keyword arguments support from fastcall. Then you can decrease _PyStack_SIZE to 4 (larger size will serve only 1.7% of calls), and may be refactor a code since an array of 4 pointers consumes less C stack than an array of 10 pointers.

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<http://bugs.python.org/issue26814>
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