Index: Objects/object.c
===================================================================
--- Objects/object.c	(revision 69436)
+++ Objects/object.c	(working copy)
@@ -1073,7 +1073,9 @@
 _Py_HashPointer(void *p)
 {
 #if SIZEOF_LONG >= SIZEOF_VOID_P
-	return (long)p;
+	/* in most cases the bottom three bits of p will be zero; shift p to
+	   reduce the number of hash collisions */
+	return (long)p >> 3;
 #else
 	/* convert to a Python long and hash that */
 	PyObject* longobj;