[issue29465] Add _PyObject_FastCall() to reduce stack consumption

[STINNER Victor]

STINNER Victor added the comment:

Oh, with pyobject_fastcall-4.patch, the stack usage of test_python_iterator is even better. The reference is 1056 bytes/call,  pyobject_fastcall-2.patch  was 944 bytes/call.

haypo at smithers$ ./python ../default/stack_overflow_28870-sp.py 
test_python_call: 9883 calls before crash, stack: 848 bytes/call
test_python_getitem: 10476 calls before crash, stack: 800 bytes/call
test_python_iterator: 9189 calls before crash, stack: 912 bytes/call

=> total: 29548 calls, 2560 bytes

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