[FeepingCreature]

You can also disable compositing conditionally in KDE, such as when a game window is opened.

[Chu4eeno]

Not in Wayland, the whole point of Wayland is to make stuff the X server + compositor + various other bits into the window manager.

[gf000]

For full-screen applications, Wayland has a protocol to let it display frames at its own pace - meant mostly for games for this very reason.

[FeepingCreature]

With X11, you can disable composition for windowed apps as well.