Hey everyone!

This small patch provides a hefty optimization to the CPU side of things.

- optimized the quadtree module:
* a performance uplift of up to 20% or more (your mileage may vary) depending on the situation
* reduced frame drops and hitching when moving the camera around
* this has also very, very slightly lowered memory usage

If you come across any issues be sure to report them here.
Thanks for reading!