I was a little bored tonight and decided to go sight seeing though the game. At one point I hit F10 to hide my UI and it seemed to me that the game ran more smoothly. So I ran a few tests. Sitting in my guild hall, hiding the UI took me from 70 to 95fps. Southern Felwithe, 140 to 200. PoK, 80 to 115ish. My UI is stock but I do have a lot up (a half dozen chat windows, 10 hot bars, etc). I get how that could slow me down but Task Manager never shows any of my CPU cores pegged. Ditto for my GPU. My question is, is this normal? Should I really be taking this much of a performance hit from the UI?