Replace PyObject_CallFunctionObjArgs() with fastcall
* 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.
diff --git a/Objects/object.c b/Objects/object.c
index d88ae3b..4844bd7 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -596,7 +596,7 @@
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 @@
return NULL;
}
/* use __dir__ */
- result = PyObject_CallFunctionObjArgs(dirfunc, NULL);
+ result = _PyObject_CallNoArg(dirfunc);
Py_DECREF(dirfunc);
if (result == NULL)
return NULL;