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/8390c0da22ddc16c781aa703c2acfac103b0bd122455c473c4e72cca702c45f5-primary.sqlite.bz2