While playing around with optimization using a simple test bed with 600 sprites bouncing around the screen;
[viewing in Chrome on the desktop]
I noticed that with no effects, I'm getting about 44 fps.
Now after adding an effect like "Brightness" to the entire layer, I get a fairly solid 60 fps. Now Brightness is set to default 100 meaning it isn't changing anything visually.
Any idea what's happening here?