To people with shell access, especially Shai: please note that the force(0) in Setup.php is there for a reason. Just because a query is slow doesn't mean you can send it to Ariel. It also has to be acceptable for the data retrieved to be seconds, or quite often, several minutes out of date. This is most certainly not the case with the link table select statements, which cause link table corruption as it is due to being non-locking.
-- Tim Starling