INADA Naoki added the comment: LOAD_METHOD support was based on tp_fastcall.
Without LOAD_METHOD support, methoddescr_get is called and stack layout after LOAD_METHOD is: NULL, (bound)PyCFunction, arg1, arg2, ... argN With LOAD_METHOD support, stack layout is: PyMethodDescrObject, self, arg1, ... argN And tp_call (or tp_fastcall) of method descriptor is called when CALL_METHOD. Without tp_fastcall, it means pack&unpack tuple happens. It is more heavy than creating temporary PyCFunction. --- Other ideas to support LOAD_METHOD for C function are: * Add _PyMethodDescr_FastCallKeywords and call it in call_function. * Create unbound PyCFunction and cache it ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29263> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
