getting Static/Kinematic out of btCollisionDispatcher?

[khoowaikeong]

i implemented a btCollisionDispatcher class, it is basically empty with some stuff move from needsResponse to needsCollision, otherwise it is unchanged. in additional, following the example in wiki filtering example i also added:

btOverlapFilterCallback * filterCallback = new YourOwnFilterCallback();
pDynamicsWorld->getPairCache()->setOverlapFilterCallback(filterCallback);

I notice there is alot of Static/Kinematic to Static/Kinematic test in needsCollision,
is that normal? it is dragging hard on my framerate and I assume these would be discarded in Broadphase.
so what do I need to do to make that happen?

Also I have assumed setting the mass to 0 make it a static object,
am i wrong, is there something else to add to make it work?