Rednaxela kd-tree 24 v 50
Let me show you something Rednaxela's and Skilgannon's kd-trees are tied in speed. And Skilgannon's kd-tree uses a bucket size of 50. You said lower bucket size is better. Therefore if Skilgannon's kd-tree used a bucket size of 24. It might be faster than Rednaxela's kd-tree.