Optimization work on SpuRaycastTask:

For ray vs. optimized bvh mesh traverse tree once for entire packet of rays
Avoid DMAing ray output data until we have a hit

Extras/BulletMultiThreaded/SpuRaycastTask/SpuSubSimplexConvexCast.cpp

@@ -97,6 +97,8 @@ bool	SpuSubsimplexRayCast::calcTimeOfImpact(const btTransform& fromRay,
 	while ( (dist2 > epsilon) && maxIter--)
 	{
 		p = supportPoint(bXform, m_shapeTypeB, m_shapeB, m_convexDataB, v);
+		btVector3 n = v.normalized();
+		p += m_marginB * n;
 		w = x - p;
 
 		btScalar VdotW = v.dot(w);