Maybe this counts as a bug? Currently, when I scroll a grid view (linear easing) exactly 2 pixels per frame, it's not smooth.
Example: scrolling 54 vertical pixels in 27 frames (verified frame-by-frame in Mac Preview with the attached GIF recording—the movement starts on frame 3). It should ideally move a consistent 2 px every frame—but instead, movement varies between 1 and 3 px per frame.
This makes the motion not feel smooth. It also means I can't prevent dither-flicker (by managing setScrollDuration and cell width/height to insure 2 px movement per frame).
(Specifically: the first and last frames both move just 1 px, while a couple of frames in the middle jump 3 px to compensate. Maybe that's a clue to a fix?)
It would be great if grid views' amazing built-in scrolling capabilities were more consistent in distance-per-frame (with linear easing).
(Going even further, an option to quantize ALL gridview scrolling—with ANY easing—to 2 px increments would be great! I do that when implementing my own motions and it really helps avoid dither-flicker. But failing that, just addressing the above issue would be awesome!)
(When viewed on hardware, the slight flicker becomes more extreme.)