The algorithm has gone through multiple maintainers since its initial release, with Micah Snyder being the maintainer since June 2021. The compression performance is asymmetric, with decompression being faster than compression. ![]() The move-to-front transform and Huffman coding are then applied. The algorithm uses several layers of compression techniques, such as run-length encoding (RLE), Burrows-Wheeler transform (BWT), move-to-front (MTF) transform, and Huffman coding.īzip2 compresses data in blocks between 100 and 900 kB and uses the Burrows-Wheeler transform to convert frequently recurring character sequences into strings of identical letters. bzip2 is particularly efficient for text data, and decompression is relatively fast. It compresses most files more effectively than older LZW and Deflate compression algorithms but is slower. It relies on separate external utilities for tasks such as handling multiple files, encryption, and archive-splitting.īzip2 was initially released in 1996 by Julian Seward. It only compresses single files and is not a file archiver. ![]() ![]() Bzip2 is a free and open-source file compression program that uses the Burrows–Wheeler algorithm.
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