Comment by kyrra

input latency. the time from pressing a key to showing on-screen is much lower with ghostty (I can't find exact number, but it seems to handle input 2-4x quicker. So around 15ms instead of 60ms).

Also just the general render pipeline is way faster in ghostty. There are things you just can't do in iTerm because it's so slow. Ghostty is attempting to improve the experience to allow for more things to be built in the terminal.