bz2 is ancient and painful, do not use it. Same for everything else in general purpose lossless compression field except brotli, the newer lz's, and of course zstandard which is rapidly becoming a common default across systems and tools. https://github.com/facebook/zstd https://mcmilk.de/projects/7-Zip-zstd/ I accept datasets. Cypherpunks isn't dying.