[ODE] ODE with DirectX9

[gl]

I've never come across anything like 'adding an int kills performance' (I
use DX9 with ODE myself).  There's something seriously wrong somewhere, but
I can't think what... maybe try reinstalling VC.  If you haven't installed a
recent VC service pack, that's also worth a try.

More generally, rendering performance is greatly affected by exactly how you
render.  Both Nivida and ATI have some great docs on how to get maximum
performance from D3D - even if you're not ready to heavily optimise your
rendering yet, there are some basic things that can really slow you down, so
it's worth checking out.

Also double-check your DX9 D3D control panel settings.
--
gl