This is my first crate for learning Rust.

Performance

test data: examples/data/3wu2.xyz, coordinates of 51053 particles extracted from a PDB file 3wu2 ¹

How to to reproduce

rust-octree (v0.0.6):

RAYON_NUM_THREADS=1 cargo run --example demo --release

scipy-ckdtree(v1.3.2):

ipython> edit scripts/bench.py
ipython> %timeit -n 10 run_test()

Behley, J.; Steinhage, V.; Cremers, A. B. Efficient Radius Neighbor Search in Three-Dimensional Point Clouds. In 2015 IEEE International Conference on Robotics and Automation (ICRA); 2015; pp 3625–3630.
scipy.spatial.cKDTree — SciPy Reference Guide
storpipfugl/pykdtree: Fast kd-tree implementation in Python