[issue29233] call_method(): call _PyObject_FastCall() rather than _PyObject_VaCallFunctionObjArgs()

[STINNER Victor]

Changes by STINNER Victor <victor.stinner at gmail.com>:


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components: +Interpreter Core
type:  -> performance
versions: +Python 3.7

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue29233>
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