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.
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 17a55dd..997d1f9 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -1439,7 +1439,7 @@
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;