bzip2 is a freely available, patent free, high-quality data compressor. It typically compresses files to within 10% to 15% 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.
acquired package info from repodata DB: repodata/1389ffdb5b166c86e334884e2384663dfc02be1592b5725c15fd6cb7c17a4d90-primary.sqlite.bz2