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.

1 files changed, 1 insertions, 1 deletions

diff --git a/Objects/weakrefobject.c b/Objects/weakrefobject.c
index ab6b235255..2f33aed026 100644
--- a/Objects/weakrefobject.c
+++ b/Objects/weakrefobject.c
@@ -867,7 +867,7 @@ PyWeakref_GetObject(PyObject *ref)
 static void
 handle_callback(PyWeakReference *ref, PyObject *callback)
 {
-    PyObject *cbresult = PyObject_CallFunctionObjArgs(callback, ref, NULL);
+    PyObject *cbresult = _PyObject_CallArg1(callback, ref);
 
     if (cbresult == NULL)
         PyErr_WriteUnraisable(callback);