For comparison: WYSIFTW parses [[Barak Obama]] in 3.5
sec on my iMac,
and in 4.4 sec on my MacBook (both Chrome 12).
Try parsing [[Barack Obama]], 4s spent on parsing a redirect page is
quite a lot (albeit it has some vandalism)
OTOH, my macbook shows raw wikitext pretty much immediately. Parser is
definitely the issue.
Domas