Schroedingers-Hat/jsphys — comment on commit 5a55447e97bc821b435c983d2c5eda0a15e2f54a
File: experimental/jsphys.html line 9
By Schroedingers-Hat:

@capnrefsmmat With this line and text disabled, performance on a 1st gen ipod touch is (barely) passable -- about 8-20fps for simple scenes.The almost-broken ipod I was playing with finished breaking before I had a chance to test further, but it seems the main constraint was number of pixels.
It breaks the layout rather severely though.
I'm also not 100% sure this is the exact code that was working, and I can't check without the ipod.
Not entirely sure where I was going with that, but it looks like a mobile app is eminently doable, even on 600MHz chips.