seen your video. Mine as well but this is not DP8 only problem. Yosemite always lag on retina screen.
It's a beta. Don't like it? Uninstall it.None of that programs running.
Its even laggy with translucency disabled. It didn't lag in DP7 with translucency disabled.
Annoying, just hope apple wil fix this. Its unacceptable for a 1550 euro brand new macbook.
Preview scrolling in fullscreen is not buttery smooth but not "choppy" either. I'd say 15 fps. Definitely noticeable, but not jarringly bad.Since updating to Yosemite scrolling in Preview.app becomes very choppy both in window and fullscreen mode. FPS while scrolling is extremely low. Anyone has the same issue? Wonder if this is an Yosemite bug or it's just my Mac