Hello, I did a little comparison between Ikarus and Chez Scheme running the 'Dominos' box2d-lite demo.
The frames per second that an implementation can achieve at any given moment is a function of what's happening in the scene; if many collisions are occuring at a particular instant, the cost of calculating the scene goes up so the fps goes down. So in running the demo (an instrumented local copy) I keep the timings in a list and get the average at the end (end being when the box at the bottom is tipped). On my machine, Ikarus acheives 118 fps. Chez does 334. Both implementations perform very well on all the demos. As far as implementations go, I think they're the only games in town for applications like this. :-) Ed
