The performance problem is also on my game.
I have a round where a roll ball follow my hero trying to smash him.
Using the game compiled with cocoonjs it is ok.
Using the game compiled with crosswalk the ball is very very slow and the hero can avoid it easly.
If crosswalk do not improve speed I cannot relase the game using it.
Other problem is the custom fonts. Using it under cocoonjs it works, under crosswalk not.
All others things are ok. But I cannot relase the game if I cannot fix this two issues...
I could also wait but these two issues must be solved... :(