Replace PyObject_CallFunction calls with only object args

with PyObject_CallFunctionObjArgs, which is 30% faster.

Modules/cPickle.c

@@ -3073,8 +3073,8 @@ find_class(PyObject *py_module_name, PyObject *py_global_name, PyObject *fc)
 					"pickles are not supported.");
 			return NULL;
 		}
-		return PyObject_CallFunction(fc, "OO", py_module_name,
-					     py_global_name);
+		return PyObject_CallFunctionObjArgs(fc, py_module_name,
+					            py_global_name, NULL);
 	}
 
 	module = PySys_GetObject("modules");

Modules/gcmodule.c

@@ -603,7 +603,7 @@ handle_weakrefs(PyGC_Head *unreachable, PyGC_Head *old)
 		assert(callback != NULL);
 
 		/* copy-paste of weakrefobject.c's handle_callback() */
-		temp = PyObject_CallFunction(callback, "O", wr);
+		temp = PyObject_CallFunctionObjArgs(callback, wr, NULL);
 		if (temp == NULL)
 			PyErr_WriteUnraisable(callback);
 		else

Modules/parsermodule.c

@@ -3267,8 +3267,8 @@ initparser(void)
             && (pickler != NULL)) {
             PyObject *res;
 
-            res = PyObject_CallFunction(func, "OOO", &PyST_Type, pickler,
-                                        pickle_constructor);
+            res = PyObject_CallFunctionObjArgs(func, &PyST_Type, pickler,
+                                               pickle_constructor, NULL);
             Py_XDECREF(res);
         }
         Py_XDECREF(func);

Objects/classobject.c

@@ -81,12 +81,9 @@ PyClass_New(PyObject *bases, PyObject *dict, PyObject *name)
 			if (!PyClass_Check(base)) {
 				if (PyCallable_Check(
 					(PyObject *) base->ob_type))
-					return PyObject_CallFunction(
+					return PyObject_CallFunctionObjArgs(
 						(PyObject *) base->ob_type,
-						"OOO",
-						name,
-						bases,
-						dict);
+						name, bases, dict, NULL);
 				PyErr_SetString(PyExc_TypeError,
 					"PyClass_New: base must be a class");
 				return NULL;

Objects/typeobject.c

@@ -4641,10 +4641,10 @@ slot_tp_getattr_hook(PyObject *self, PyObject *name)
 	     (void *)PyObject_GenericGetAttr))
 		res = PyObject_GenericGetAttr(self, name);
 	else
-		res = PyObject_CallFunction(getattribute, "OO", self, name);
+		res = PyObject_CallFunctionObjArgs(getattribute, self, name, NULL);
 	if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
 		PyErr_Clear();
-		res = PyObject_CallFunction(getattr, "OO", self, name);
+		res = PyObject_CallFunctionObjArgs(getattr, self, name, NULL);
 	}
 	return res;
 }
@@ -4781,7 +4781,7 @@ slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type)
 		obj = Py_None;
 	if (type == NULL)
 		type = Py_None;
-	return PyObject_CallFunction(get, "OOO", self, obj, type);
+	return PyObject_CallFunctionObjArgs(get, self, obj, type, NULL);
 }
 
 static int
@@ -5728,8 +5728,8 @@ super_descr_get(PyObject *self, PyObject *obj, PyObject *type)
 	if (su->ob_type != &PySuper_Type)
 		/* If su is an instance of a (strict) subclass of super,
 		   call its type */
-		return PyObject_CallFunction((PyObject *)su->ob_type,
-					     "OO", su->type, obj);
+		return PyObject_CallFunctionObjArgs((PyObject *)su->ob_type,
+					            su->type, obj, NULL);
 	else {
 		/* Inline the common case */
 		PyTypeObject *obj_type = supercheck(su->type, obj);

Objects/weakrefobject.c

@@ -851,7 +851,7 @@ PyWeakref_GetObject(PyObject *ref)
 static void
 handle_callback(PyWeakReference *ref, PyObject *callback)
 {
-    PyObject *cbresult = PyObject_CallFunction(callback, "O", ref);
+    PyObject *cbresult = PyObject_CallFunctionObjArgs(callback, ref, NULL);
 
     if (cbresult == NULL)
         PyErr_WriteUnraisable(callback);

Python/ceval.c

@@ -4053,7 +4053,7 @@ build_class(PyObject *methods, PyObject *bases, PyObject *name)
 			metaclass = (PyObject *) &PyClass_Type;
 		Py_INCREF(metaclass);
 	}
-	result = PyObject_CallFunction(metaclass, "OOO", name, bases, methods);
+	result = PyObject_CallFunctionObjArgs(metaclass, name, bases, methods, NULL);
 	Py_DECREF(metaclass);
 	if (result == NULL && PyErr_ExceptionMatches(PyExc_TypeError)) {
 		/* A type error here likely means that the user passed 

Python/import.c

@@ -1043,7 +1043,7 @@ get_path_importer(PyObject *path_importer_cache, PyObject *path_hooks,
 		PyObject *hook = PyList_GetItem(path_hooks, j);
 		if (hook == NULL)
 			return NULL;
-		importer = PyObject_CallFunction(hook, "O", p);
+		importer = PyObject_CallFunctionObjArgs(hook, p, NULL);
 		if (importer != NULL)
 			break;
 
@@ -2499,8 +2499,8 @@ PyImport_Import(PyObject *module_name)
 		goto err;
 
 	/* Call the _import__ function with the proper argument list */
-	r = PyObject_CallFunction(import, "OOOO",
-				  module_name, globals, globals, silly_list);
+	r = PyObject_CallFunctionObjArgs(import, module_name, globals,
+					 globals, silly_list, NULL);
 
   err:
 	Py_XDECREF(globals);