Or if it works at all like Scrubby (http://nornagon.github.com/scrubby/ http://nornagon.github.com/scrubby/) which was on HN a couple days ago, it might rewrite

Or if it works at all like Scrubby (http://nornagon.github.com/scrubby/ http://nornagon.github.com/scrubby/) which was on HN a couple days ago, it might rewrite all constants into global lookup table indexes, which surely wreaks havoc on performance.