|bzip2 is a freely available, patent free (see below), high-quality|
data compressor. It typically compresses files to within 10X to 15X of the best
available techniques (the PPM family of statistical compressors), whilst being around
twice as fast at compression and six times faster at decompression.
hg clone https://testtoolshed.g2.bx.psu.edu/repos/iuc/package_bzlib_1_0