both iTerm2 and Terminal.app got so slow that I switched to Hyper which contrary to common sense is blazing fast for me. I’ve also started experimenting with URXVT via XQuartz but the native feel just isn’t there like it is for Hyper.
Who knew Electron apps could out perform native ones (even with GPU acceleration in iTerm2’s case)! I don’t know how or why but in this case it is so.