I would assume that it does have performance implications, but that they go in the other direction -- I commented on this here: http://news.ycombinator.com/ite

I would assume that it does have performance implications, but that they go in the other direction -- I commented on this here: http://news.ycombinator.com/item?id=879952 http://news.ycombinator.com/item?id=879952