[issue29507] Use FASTCALL in call_method() to avoid temporary tuple

[INADA Naoki]

INADA Naoki added the comment:

Maybe, we can skip Method object entirely using _PyObject_GetMethod().
Currently it is used only in LOAD_METHOD.
But PyObject_CallMethod(), _PyObject_CallMethodId(), PyObject_CallMethodObjArgs(), _PyObject_CallMethodIdObjArgs() can use it too.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29507>
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