I'm convinced it has something to do with the syntax highlighting. Disable that, and it runs flawlessly on 10+GB files. I looked into it a bit a few weeks ago

I'm convinced it has something to do with the syntax highlighting. Disable that, and it runs flawlessly on 10+GB files. I looked into it a bit a few weeks ago but got distracted. It uses regex and many of the statements could be improved. Plus they use a fairly off the wall regex engine that has pretty poor performance but they use it because it supports every damn encoding under the sun. I think if that can be figured out, the only "sluggish" part left will be startup (which IMO is acceptable at this point, but improvements would always be welcome)