I'd like to see it. I'm running XFCE now, I wouldn't call it slow but it's not quite as snappy as I'd like it to be.

Turn off composition (if Xfce allows you to, like KDE does). Then drag a window around your screen on a high framerate monitor and feel the difference.

just tried it, gives nasty looking black bars around the outside of firefox.

latency is still there. e.g. pressing super has about a 100ms wait before the application launcher appears, same as with compositing on.

Also, if you can, for desktop worloads, switch to the xanmod kernel.

I think GTK has a setting on setting up the menu spawning speed.