Dunno, try it yourself. I wrote the hello world with C (12 lines?) and launched it on NixOS in Wayland (sway or niri). Maybe non-Wayland does better? Granted,

Dunno, try it yourself. I wrote the hello world with C (12 lines?) and launched it on NixOS in Wayland (sway or niri). Maybe non-Wayland does better? Granted, not the best measure of memory usage. But the GTK 2 version was 30mb.