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/27175616bcfdcd3043efabc81dd49522eeafc71d5102c7877b737d6e80b97422-primary.sqlite.bz2