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/odictobject.c b/Objects/odictobject.c
index 22b1f1d..77fb3a1 100644
--- a/Objects/odictobject.c
+++ b/Objects/odictobject.c
@@ -1256,7 +1256,7 @@
if (PyODict_CheckExact(od))
od_copy = PyODict_New();
else
- od_copy = PyObject_CallFunctionObjArgs((PyObject *)Py_TYPE(od), NULL);
+ od_copy = _PyObject_CallNoArg((PyObject *)Py_TYPE(od));
if (od_copy == NULL)
return NULL;