I didn't even realize my (iTerm2) terminal emulator wasn't fast until I tried Alacritty. When doing non-intensive tasks, the difference is less one of vision and more a "feel". And it feels SNAPPY. And, as a heavy tmux user, I'm definitely your target audience.

But...the font rendering doesn't look as good as iTerm's, at least not yet.

I suspect I'll be swapping once you're at a public build release.