This isn't so much a St issue as it is a Tmux one: It happens regardless whether I use St or Urxvt. Maybe the Tmux lists will have better info for you since this isn't (as far as I've seen) an St issue.
Excerpts from Peter John Hartman's message of 2011-10-20 10:36:09 -0400: > Hi, > > From what I can gather, there's a bit of confusion on whether st has > performance issues or not. Here's a clear case where it is slow on > my box: > > split a tmux window into two panes. On the LHS edit a latex doc with > joe. On the RHS compile that latex doc with pdf2latex. I think it is > the scrolling alone that causes the lag, so you could do other things to > emulate it. > > The problem: there's so much lag I can't do anything in my joe pane whilst > the latex stuff is compiling. > > Peter >
