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/3aed67b59a46e7d4ddd2f1b5164fb6d24b870eae0d80231ea2e10112c4792302-primary.sqlite.bz2