> OSX + iTerm2 is so damn laggy vs. Linux even on worse hardware
This is one of those things you notice in a jarring way as a Linux user coming to other platforms, but people kinda look at you sideways and don't believe you when you tell them.
What I tend to notice, especially as someone who prefers to use a full screen terminal tiled with tmux, is (1) poor availability of Quake-style dropdown terminals on macOS and Windows and (2) extremely slow rendering on most terminal emulators for those platforms. On the other hand, I think I've heard some Mac users say they detect some input lag on Linux terminals.
iTerm2's implementation was basically unusable the last time I tried it, for details I can't remember well. One issue was that if you have iTerm swap the command key and option keys for in-terminal keybinds, it modifies them altogether when you're using the app, breaking command-tabbing out of the app, among other keybinds. (Having it swap these was something I did because it was necessary to get some combined modifier keystrokes to go through correctly, perhaps on pain of reconfiguring each of its escape codes to match xterm individually. I can't quite recall.) To get the behavior I wanted I ended up having to bypass iTerm's drop-down behavior in favor of some Hammerspoon automation. I put up with all of this because all other terminal emulators available on macOS were abominably slow, to the point that tailing a log in any tmux window makes the entire pane lag enough to make typing suck. (And the only way to get acceptable performance in iTerm2 was by enabling hardware acceleration.)
I'm glad that Windows Terminal added that feature this year. It's better than most terminal emulators on Windows in most other ways, too. I'll try it the next time I'm on Windows.
This is one of those things you notice in a jarring way as a Linux user coming to other platforms, but people kinda look at you sideways and don't believe you when you tell them.
What I tend to notice, especially as someone who prefers to use a full screen terminal tiled with tmux, is (1) poor availability of Quake-style dropdown terminals on macOS and Windows and (2) extremely slow rendering on most terminal emulators for those platforms. On the other hand, I think I've heard some Mac users say they detect some input lag on Linux terminals.