hmm, does anyone have some performance samples?
I checked the site out and tried Kiwi Run on my tablet and wowzer. The game ran smooth. With 3 parallax backrounds, 1 full, 2 apx halves. The play later and speed of render. It all went really smoothly. I tried on my ipodTouch 4g and it played but crashed when I lost. There seems to be some bad memory management going on. Certainly a possibility that this may have CocoonJS performance or better. However without more testing there is no idea.
I think the best part of this is. Is that since it's open source we can may be able to extend it with more immediate features.
however the down side of it requiring a mac is a problem. Though i would purchase a cheap used mac just to be able to use this :)