efficient-hdbscan-c - https://github.com/Karthick47v2/efficient-hdbscan
EMST - use_mlpack_for_dctree_computation
fast_hdbscan - https://github.com/TutteInstitute/fast_hdbscan
parallel_hdbscan - https://github.com/wangyiqiu/hdbscan.git
sklearn_hdbscan - https://github.com/scikit-learn-contrib/hdbscan/
