thanks for your answer Genbox! :)
The library was compiled in debug, and that speeded up things a little bit :) However it's still quite slow:
I'm following the tips in "One Body, Multiple Fixtures"
which is the one that should probably apply to my problem, but I'm not getting good results. My code is simply this:
for (int i=0;i<vertices.Count-1;i++)
where vertices contains 8192 vertices. It still takes around 6 seconds in a 2.7Ghz dual core, and forever on windows phone 7. Maybe I'm doing something wrong?
Just in case it's useful to you, using the profiler it seems the hot path is:
simulation is also quite slow (specially in WP7)