Perhaps I am one of the few users fussy enough to notice but ever since Mavericks, OS X has exhibited a rather annoying UI bug. When dragging windows around the desktop, there is always a slight delay between the movement of the cursor and that of the window being dragged.
I have noticed that the issue is not present when hardware acceleration is disabled, which leads me to the conclusion that it is somehow driver related despite being hardware independent. Given OS X's increasingly poor optimization following Mountain Lion, I can only presume this behavior to be symptomatic of it.
Here are a couple of short videos which demonstrate the issue.
Dragging a window under Snow Leopard
Dragging a window under Yosemite
I have noticed that the issue is not present when hardware acceleration is disabled, which leads me to the conclusion that it is somehow driver related despite being hardware independent. Given OS X's increasingly poor optimization following Mountain Lion, I can only presume this behavior to be symptomatic of it.
Here are a couple of short videos which demonstrate the issue.
Dragging a window under Snow Leopard
Dragging a window under Yosemite