19 lines
1.0 KiB
Plaintext
19 lines
1.0 KiB
Plaintext
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LZMA is an abbreviation of Lempel-Ziv-Markov chain-Algorithm.
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It is the default compression method of 7z file format in 7-zip
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program. The purpose of LZMA utils is to make the usage of LZMA
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compression easy on *NIX based systems like GNU/*/Linux and *BSD.
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The average compression ratio is usually 30% better than
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'gzip --best' and 15% better than 'bzip2 --best'. Some files can
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be compressed even over 50% smaller than with gzip. With speed
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LZMA cannot compete with gzip in neither compression nor
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decompression. With bzip2 LZMA is in par when compressing with
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approximately same compression ratio but for smallest file size
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the time required can be 5 times the time used by bzip2. Luckily
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the same does not apply to decompression speed: even the tightest
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LZMA files can be decompressed in time less than a half of the
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time that bzip2 would take. This makes LZMA an ideal compression
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tool for distributing files in the Internet and on CDs/DVDs
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because the files are usually compressed only once but
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decompressed many times.
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