Internal Program Version: bzip3  1.5.1

A compressor featuring improved compression ratios and performance
over bzip2 thanks to a order-0 context mixing entropy coder, a
Burrows-Wheeler transform code making use of suffix arrays, a RLE
with Lempel Ziv+Prediction pass based on LZ77-style string matching
and PPM-style context modeling.

bzip3 1.4.0 can outperform zstd 1.5.5 on specific data sets, e.g.
15% better ratio for same compress time on source code, but has
time trouble with e.g. object files.

https://github.com/kspalaiologos/bzip3