This is a simple command line implementation of the LZMA compression algorithm from the LZMA SDK. It uses a raw LZMA format instead of the xz or 7z container formats, and produces compression ratios that are usually about 25-30% better than bzip2, and decompression speeds that are about twice as fast. The disadvantages are higher CPU and RAM requirements for compression. WWW: http://www.7-zip.org/sdk.html