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/dd4dea9dc5aac1d61f7a638c7e75ab7e18453506d28d9029f8c9e6809d4dd32c-primary.sqlite.bz2