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Replace PyObject_CallFunctionObjArgs() with fastcall

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* PyObject_CallFunctionObjArgs(func, NULL) => _PyObject_CallNoArg(func)
* PyObject_CallFunctionObjArgs(func, arg, NULL) => _PyObject_CallArg1(func, arg)

PyObject_CallFunctionObjArgs() allocates 40 bytes on the C stack and requires
extra work to "parse" C arguments to build a C array of PyObject*.

_PyObject_CallNoArg() and _PyObject_CallArg1() are simpler and don't allocate
memory on the C stack.

This change is part of the fastcall project. The change on listsort() is
related to the issue #23507.
This commit is contained in:
Victor Stinner 2016-12-01 14:43:22 +01:00
parent 8be1c39eb3
commit 27580c1fb5
33 changed files with 71 additions and 83 deletions
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4
Objects/object.c
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@ -596,7 +596,7 @@ PyObject_Bytes(PyObject *v)
func = _PyObject_LookupSpecial(v, &PyId___bytes__);
if (func != NULL) {
result = PyObject_CallFunctionObjArgs(func, NULL);
result = _PyObject_CallNoArg(func);
Py_DECREF(func);
if (result == NULL)
return NULL;
@ -1314,7 +1314,7 @@ _dir_object(PyObject *obj)
return NULL;
}
/* use __dir__ */
result = PyObject_CallFunctionObjArgs(dirfunc, NULL);
result = _PyObject_CallNoArg(dirfunc);
Py_DECREF(dirfunc);
if (result == NULL)
return NULL;