FWIW, We're working on adding native support for scrolling. Someone has actually made an attempt at it recently: https://github.com/jwilm/alacritty/pull/657
Initial testing has shown it not to (noticeably) impact perf in our highly unscientific benchmarks.
Re:Terminal and shell performance
by steveklabnik on Tuesday July 18, 2017 @04:10PM
(#14799657)
Ah great!
I'm a native Windows user these days, so I can't use it quite yet, and as such, have fallen behind the time on news.
> alacritty and terminal.app are fast enough that they’re actually limited by the speed of tmux.