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/e5f38ba4169a71daafe2fb47abf7ae468a296eb65a434bbe3807eeb03acf9346-primary.sqlite.bz2