I switched to using Fish as my shell about a year ago, and there were some performance issues with it and iTerm, at least with my default fish/tmux/vim/vimux setup. I don’t rememeber what it was exactly, I just remember that switching to stock Terminal.app made it go away.
I may try this iTerm beta just to see if it fixed it.
Interesting! I also use Fish primarily. ZSH sometimes and flip back to Bash when it doesn't work well with Fish but still haven't seen issues. Thanks for sharing.
I may try this iTerm beta just to see if it fixed it.