Took me 5 seconds to fix, yay! I was just calling sort wrong. Test test work now, as well as a benchmark I tried on it.
Sweet, looks good. Darn off by one issues. hehe. I grabbed your fix and also added a few things to keep objects from potentially hanging around and not gc’ing after removal from a scene. Also readded a to 0 set in the distance function. Looks good. 