> Traversal is proportional to the number of pointers changed since the last collection (HotSpot's GCs do card marking). True. I was just trying to make the po

> Traversal is proportional to the number of pointers changed since the last collection (HotSpot's GCs do card marking). True. I was just trying to make the point that GC comes with complexity cost, and this should be considered—it's not "free" for an arbitrary algorithm.