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/d96f7206249b192484cd473c7213938a2173442406260d9a32d8f941053a6c53-primary.sqlite.bz2