Question: any ideas how something with that many assets and concurrent processes runs smoothly down to the iPhone? Jquery and CSS transforms start slowing down

Question: any ideas how something with that many assets and concurrent processes runs smoothly down to the iPhone? Jquery and CSS transforms start slowing down when I stack them in each other. If I'm the problem here, and not the browsers, could someone point me to resources to make js with images run smoother in the browser? Anyone else have this problem? Btw, awesome product with rocketpack. Wish I could've used it before Disney got it paws on it.