No, I am not using any collision listeners.  I have a simple mesh loaded as a map (two cubic rooms with a couple of corridors between them) with an octree, and a couple of meshes for players within it.  I'll list what seems to be getting allocated for each iteration:

• Plane and SimpleVectors in World.doWorldCollisionEllipsoid()
• int[] and Object[] in OcTree.getColliderLeafs()
• SimpleVector in World.checkObjCollisionEllipsoid()
• SimpleVector and CollisionInfo in World.checkSomeCollisionEllipsoid()
• Matrix in cloneMatrix() called from Object3D.getWorldTransformation() in ellipsoidIntersectsAABB()

I am working on a little project and I noticed that the GC seems to be running every couple of seconds and causing noticeable stuttering despite my efforts to avoid object allocations.  Using the Dalvik allocation tracker, I see that many objects are being allocated during runtime by the ellipsoid collision detection methods (Object3D.checkForCollisionEllipsoid).  Has anyone else encountered similar problems and can offer a solution or workaround to cut down on GCs?  I would hope to avoid it, but might switching to spherical or ray-polygon collisions result in fewer allocations?  Thanks in advance.

Also, since this is my first post here, I would like to say thank you to Egon for this wonderful engine.