Speed up PyType_stgdict and PyObject_stgdict.

diff --git a/Modules/_ctypes/stgdict.c b/Modules/_ctypes/stgdict.c
index 1ddbf8532f2b5595ecf4d0a3815ac511caf0f5b7..149a7ea5e82f2ebc48288eeec8fde51fb2f8b168 100644 (file)
--- a/Modules/_ctypes/stgdict.c
+++ b/Modules/_ctypes/stgdict.c
@@ -134,16 +134,25 @@ PyType_stgdict(PyObject *obj)
        type = (PyTypeObject *)obj;
        if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_CLASS))
                return NULL;
-       if (!type->tp_dict || !StgDict_Check(type->tp_dict))
+       if (!type->tp_dict || !StgDict_CheckExact(type->tp_dict))
                return NULL;
        return (StgDictObject *)type->tp_dict;
 }
 
 /* May return NULL, but does not set an exception! */
+/*
+  This function should be as fast as possible, so we don't call PyType_stgdict
+  above but inline the code, and avoid the PyType_Check().
+*/
 StgDictObject *
 PyObject_stgdict(PyObject *self)
 {
-       return PyType_stgdict((PyObject *)self->ob_type);
+       PyTypeObject *type = self->ob_type;
+       if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_CLASS))
+               return NULL;
+       if (!type->tp_dict || !StgDict_CheckExact(type->tp_dict))
+               return NULL;
+       return (StgDictObject *)type->tp_dict;
 }
 
 /* descr is the descriptor for a field marked as anonymous.  Get all the