Replace PyObject_CallFunction() with fastcall

Replace
    PyObject_CallFunction(func, "O", arg)
and
    PyObject_CallFunction(func, "O", arg, NULL)
with
    _PyObject_CallArg1(func, arg)

Replace
    PyObject_CallFunction(func, NULL)
with
    _PyObject_CallNoArg(func)

_PyObject_CallNoArg() and _PyObject_CallArg1() are simpler and don't allocate
memory on the C stack.

4 files changed, 8 insertions, 8 deletions

diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 6608798..cbf5b50 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -538,7 +538,7 @@ deque_copy(PyObject *deque)
         return NULL;
     }
     if (old_deque->maxlen < 0)
-        return PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "O", deque, NULL);
+        return _PyObject_CallArg1((PyObject *)(Py_TYPE(deque)), deque);
     else
         return PyObject_CallFunction((PyObject *)(Py_TYPE(deque)), "Oi",
             deque, old_deque->maxlen, NULL);
diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index f3e1e9f..bafcaa5 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -2831,7 +2831,7 @@ expat_set_error(enum XML_Error error_code, Py_ssize_t line, Py_ssize_t column,
     if (errmsg == NULL)
         return;
 
-    error = PyObject_CallFunction(st->parseerror_obj, "O", errmsg);
+    error = _PyObject_CallArg1(st->parseerror_obj, errmsg);
     Py_DECREF(errmsg);
     if (!error)
         return;
@@ -2894,7 +2894,7 @@ expat_default_handler(XMLParserObject* self, const XML_Char* data_in,
                 (TreeBuilderObject*) self->target, value
                 );
         else if (self->handle_data)
-            res = PyObject_CallFunction(self->handle_data, "O", value);
+            res = _PyObject_CallArg1(self->handle_data, value);
         else
             res = NULL;
         Py_XDECREF(res);
@@ -3004,7 +3004,7 @@ expat_data_handler(XMLParserObject* self, const XML_Char* data_in,
         /* shortcut */
         res = treebuilder_handle_data((TreeBuilderObject*) self->target, data);
     else if (self->handle_data)
-        res = PyObject_CallFunction(self->handle_data, "O", data);
+        res = _PyObject_CallArg1(self->handle_data, data);
     else
         res = NULL;
 
@@ -3031,7 +3031,7 @@ expat_end_handler(XMLParserObject* self, const XML_Char* tag_in)
     else if (self->handle_end) {
         tag = makeuniversal(self, tag_in);
         if (tag) {
-            res = PyObject_CallFunction(self->handle_end, "O", tag);
+            res = _PyObject_CallArg1(self->handle_end, tag);
             Py_DECREF(tag);
         }
     }
@@ -3090,7 +3090,7 @@ expat_comment_handler(XMLParserObject* self, const XML_Char* comment_in)
     if (self->handle_comment) {
         comment = PyUnicode_DecodeUTF8(comment_in, strlen(comment_in), "strict");
         if (comment) {
-            res = PyObject_CallFunction(self->handle_comment, "O", comment);
+            res = _PyObject_CallArg1(self->handle_comment, comment);
             Py_XDECREF(res);
             Py_DECREF(comment);
         }
diff --git a/Modules/pyexpat.c b/Modules/pyexpat.c
index b3259d5..541eee7 100644
--- a/Modules/pyexpat.c
+++ b/Modules/pyexpat.c
@@ -119,7 +119,7 @@ set_error(xmlparseobject *self, enum XML_Error code)
                                   XML_ErrorString(code), lineno, column);
     if (buffer == NULL)
         return NULL;
-    err = PyObject_CallFunction(ErrorObject, "O", buffer);
+    err = _PyObject_CallArg1(ErrorObject, buffer);
     Py_DECREF(buffer);
     if (  err != NULL
           && set_error_attr(err, "code", code)
diff --git a/Modules/readline.c b/Modules/readline.c
index 3b94d4a..389954f 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -868,7 +868,7 @@ on_hook(PyObject *func)
     int result = 0;
     if (func != NULL) {
         PyObject *r;
-        r = PyObject_CallFunction(func, NULL);
+        r = _PyObject_CallNoArg(func);
         if (r == NULL)
             goto error;
         if (r == Py_None)