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/floatobject.c b/Objects/floatobject.c
index 17a55dd114..997d1f9665 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1439,7 +1439,7 @@ float_fromhex(PyObject *cls, PyObject *arg)
         goto parse_error;
     result = PyFloat_FromDouble(negate ? -x : x);
     if (cls != (PyObject *)&PyFloat_Type && result != NULL) {
-        Py_SETREF(result, PyObject_CallFunctionObjArgs(cls, result, NULL));
+        Py_SETREF(result, _PyObject_CallArg1(cls, result));
     }
     return result;