7-Zip

7-zip is a general-purpose archiver by Igor Pavlov; while it handles a number of formats, its native format is 7z, based on the LZMA format. Lately, this has been superceded by the LZMA2 format, which is the compression method used for this test.

NanoZip 0.07 alpha/Win64 - (C) 2008-2009 Sami Runsas - www.nanozip.net
 *** THIS IS AN EARLY ALPHA VERSION OF NANOZIP *** USE ONLY FOR TESTING ***
usage: nz.exe <command> -<switch 1> -<switch N> <archive_file> <files...>
e.g. nz.exe a -cO -m1.2g backup document1.txt document2.txt
 
 commands:
  a       add files to archive
  l       list contents of archive
  q       quick check archive for damage
  t       test archive (full decompression)
  x       extract files from archive
  w32c    create self-extracting archive (windows 32-bit console)
  info    information about host system
  help    show advanced help
  unix    show unix specific options
 switches:
  -                stop scanning switches
  r                recurse subdirectories
  c<n,f,F,d,       compressor: none, nz_lzpf, nz_lzpf_large, nz_lzhd,
    D,o,O,c>       nz_lzhds, nz_optimum1 (default), nz_optimum2, nz_cm
  s<n,e,a,s>       sort files before compression: no sorting,
                   by extension (default), by name, by size
  h<n,c,C,f>       checksum: none, crc16, crc32, fletcher16 (default)
  m<0...n>[k,m,g]  memory usage (approximate)
  nt               do not store timestamps
  np               do not store permissions
  nm               do not store metadata or redundancy (equals -nt -np -hn)
  sp               strip paths from files
  o<path>          output path
  y                yes to all queries
  v                verbose
  x<file>          exclude file(s)
7-Zip
Command 32-bit 64-bit Difference
Average 7.763%
7z a -t7z -m0=lzma2 -mx=1 146.250 140.650 -3.829%
7z a -t7z -m0=lzma2 -mx=5 1357.427 1538.325 13.327%
7z a -t7z -m0=lzma2 -mx=9 1539.168 1751.454 13.792%

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§4991 · March 6, 2010 · Tags: , , ·

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