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, 3 insertions, 3 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index 42c0c614b1..d4a90c4fc9 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1756,7 +1756,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
                 Py_DECREF(value);
                 goto error;
             }
-            res = PyObject_CallFunctionObjArgs(hook, value, NULL);
+            res = _PyObject_CallArg1(hook, value);
             Py_DECREF(value);
             if (res == NULL)
                 goto error;
@@ -3062,7 +3062,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
             Py_DECREF(mgr);
             if (enter == NULL)
                 goto error;
-            res = PyObject_CallFunctionObjArgs(enter, NULL);
+            res = _PyObject_CallNoArg(enter);
             Py_DECREF(enter);
             if (res == NULL)
                 goto error;
@@ -3096,7 +3096,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
             }
             SET_TOP(exit);
             Py_DECREF(mgr);
-            res = PyObject_CallFunctionObjArgs(enter, NULL);
+            res = _PyObject_CallNoArg(enter);
             Py_DECREF(enter);
             if (res == NULL)
                 goto error;