Colludium Nah, I use many physics objects bumping into each other (think asteroid field) and I was getting only 10fps on my first attempt. I just stripped out everything to find the performance culprit. It ended up being two things.
1. Adjust HSL web effect on asteroids. I can replace this with extra graphics and it bring performance up to 35 fps.
2. Having any physics objects moving. Having one knocks off about 25fps. Having more than one doesn't impact much more dramatically within reason. So I assume what I'm seeing is the overhead of the phsyics engine when its active.
However, saying that I have tried swapping asm.js and implemented WebViewPlus. Supposedly asm.js is better for chrome and I'm hoping the nitro js engine speeds it up. So I'll see what happens with my tests.
I also thought that perhaps I could reduce the intensity of the physics by changing the stepping?