I'm working on several moderately-sized Rails projects, and lately it's been taking several seconds to open or close a tab. I thought it was a memory issue, but restarting TM doesn't seem to help at all. This also doesn't seem to be at all related to the size of the file, so I don't think it's taking a long time to do the syntax highlighting. Is there something I could do to track down what's causing the slowness?