http://www.sirlin.net/blog/2009/11/5/making-games-faster.html
PS: Google apparently has't bothered using spam filters on Google
Groups. I only just discovered the > 100 spam threads (because Google
automatically deletes them from gmail - just not from groups. Argh!).
All deleted + reported now.
I've also turned on moderation for all new members, hopefully keep the
spambots away...