22 lines
1.3 KiB
Text
22 lines
1.3 KiB
Text
For those who *must* cram their data into the smallest possible archives,
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paq is an archiver with the best lossless compression ratios now available
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across a wide variety of test data, according to several benchmarks.
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It uses adaptive weighting of context models to obtain archives that are
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typically about 65%-85% of the size of the corresponding best-performance
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gzip archives. This comes at the expense of increased memory usage
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(30MB - 1650MB, depending upon the user-specified level of compression),
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and lower speeds(compression and decompression are often tens of times
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slower than bzip2 or gzip, and can be as much as several hundreds of times
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slower).
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The command-line interface permits compression, decompression, and viewing
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of the contents of archives. Compression preserves directory structure
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but not file attributes. There are no commands to update an existing
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archive or to extract part of an archive. Files and archives larger than
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2GB are not supported (but might work on 64-bit machines, not tested).
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File names with nonprintable characters are not supported (spaces
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are OK). Note that different versions of paq are usually incompatible, so
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steps must be taken to ensure that the contents of archives made with older
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versions of paq will still be accessible after updating paq.
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WWW: http://www.cs.fit.edu/~mmahoney/compression/
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