I have no idea why the performance is different on windows and linux. But you should replace dynamic trimeshes with primitives if possible. Probably you could ask on the ODE list if there are known performance differences, also.
But you should replace dynamic trimeshes with primitives if possibleum, not sure what you mean by this. also is it possible there is a bug in the windows ode.dll thats not in the linux ode.so? I ask because this acts more like a bug than just a performance difference, the framerates just drasticly drop then keep slowing down, like I can add 7 pins and it runs ok but then I add 1 more and the fps drops way down from hundreds and keeps slowing until <1-2fps also if I load the bowling ball model in windows it crashes the jvm every time I add the second ball. but it doesnt crash at all in linux.
But you should replace dynamic trimeshes with primitives if possible
ok I was thinking about this, maybe I can use primitives for collision "inside" the model instead of trinagles. :)
edit: this worked well :D