LRZIP is a compression program that can achieve very high compression ratios and speed when used with large files. It uses the combined compression algorithms of lzma for maximum compression, lzo for maximum speed, and the long range redundancy reduction of rzip. It is designed to scale with increases with RAM size, improving compression further. A choice of either size or speed optimizations allows for either better compression than even lzma can provide, or better speed than gzip, but with bzip2 sized compression levels. License: GNU General Public License (GPL) Changes:
The LZMA SDK was updated to the latest version, 4.57. Multithreading support for LZMA was added, which nearly doubles speed. A gzip compression option was added. An assembler module for CRC computation was added, but this is dependent on the processor. More enhancements were made to the lzo_compresses function to avoid LZMA errors. File cleanup was done. configure.in was changed to improve compiling. Code cleanup was done. Documentation with benchmarks was improved and expanded. Major bugs were fixed to work on big RAM machines. A major fix was made to prevent copying all data above 4GB uncompressed.

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