They also jank on windows - but only on my 1080p display. When I move it along to my 4k display, it suddenly janks a lot less, about 50fps or so. I wonder why c

They also jank on windows - but only on my 1080p display. When I move it along to my 4k display, it suddenly janks a lot less, about 50fps or so. I wonder why chrome is turning on composition in 4k and off in 1080p?