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/97a8837b13d1803b9266184a3cf9dafc96fd7534775890089deafb0b3375ffe6-primary.sqlite.bz2