I second that, I did a comparison a few years ago and pgbouncer blew pgpool away:<p><a href="http://www.last.fm/user/Russ/journal/2008/02/21/zd_postgres_connection_pools:_pgpool_vs._pgbouncer" rel="nofollow">http://www.last.fm/user/Russ/journal/2008/02/21/zd_postgres_...</a>