Vladimir Marangozov's long-awaited malloc restructuring. For more comments, read the patches@python.org archives. For documentation read the comments in mymalloc.h and objimpl.h. (This is not exactly what Vladimir posted to the patches list; I've made a few changes, and Vladimir sent me a fix in private email for a problem that only occurs in debug mode. I'm also holding back on his change to main.c, which seems unnecessary to me.)

--- a/Python/traceback.c	Wed May 03 22:34:12 2000 +0000
+++ b/Python/traceback.c	Wed May 03 23:44:39 2000 +0000
@@ -71,7 +71,7 @@
 	Py_TRASHCAN_SAFE_BEGIN(tb)
 	Py_XDECREF(tb->tb_next);
 	Py_XDECREF(tb->tb_frame);
-	PyMem_DEL(tb);
+	PyObject_DEL(tb);
 	Py_TRASHCAN_SAFE_END(tb)
 }