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, 2 insertions, 2 deletions

diff --git a/Objects/genobject.c b/Objects/genobject.c
index 2680ab0e12..1db83c9d64 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -43,7 +43,7 @@ _PyGen_Finalize(PyObject *self)
             /* Save the current exception, if any. */
             PyErr_Fetch(&error_type, &error_value, &error_traceback);
 
-            res = PyObject_CallFunctionObjArgs(finalizer, self, NULL);
+            res = _PyObject_CallArg1(finalizer, self);
 
             if (res == NULL) {
                 PyErr_WriteUnraisable(self);
@@ -591,7 +591,7 @@ _PyGen_SetStopIterationValue(PyObject *value)
      *
      * (See PyErr_SetObject/_PyErr_CreateException code for details.)
      */
-    e = PyObject_CallFunctionObjArgs(PyExc_StopIteration, value, NULL);
+    e = _PyObject_CallArg1(PyExc_StopIteration, value);
     if (e == NULL) {
         return -1;
     }