pickle complexity limit?

[Mark Hahn]

"Paul Rubin" <http://phr.cx@NOSPAM.invalid> wrote in message
news:7x4qxckwdu.fsf at ruckus.brouhaha.com...
> martin at v.loewis.de (Martin v. Löwis) writes:
> > Read the pickle code, understand why it is recursive, and implement an
> > alternative that isn't recursive, yet preserves the original semantics
> > in terms of pickling order and sequence in which methods are called on
> > objects. When you are done, please contribute your changes back, to
> > sf.net/projects/python.
>
> I wonder if it's feasible to write a pickler as a C extension that
> works something like a pointer-reversing garbage collector,
> eliminating the need for recursion and still not needing any extra
> storage in the objects.

You are quoting Martin from a message that I never saw.  How can that be?
I'm reading all the messages from comp.lang.python in usenet with outlook
express.