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/Modules/posixmodule.c b/Modules/posixmodule.c
index 2e9eb9e..129ff1c 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -902,7 +902,7 @@ path_converter(PyObject *o, void *p)
             goto error_exit;
         }
 
-        o = to_cleanup = PyObject_CallFunctionObjArgs(func, NULL);
+        o = to_cleanup = _PyObject_CallNoArg(func);
         Py_DECREF(func);
         if (NULL == o) {
             goto error_exit;
@@ -12041,7 +12041,7 @@ PyOS_FSPath(PyObject *path)
                             Py_TYPE(path)->tp_name);
     }
 
-    path_repr = PyObject_CallFunctionObjArgs(func, NULL);
+    path_repr = _PyObject_CallNoArg(func);
     Py_DECREF(func);
     if (NULL == path_repr) {
         return NULL;