BCM

BCM is a relatively new file compression program by Ilia Muraviev. It is important to note that the 64-bit version of BCM is not simply a different compilation of the 32-bit code; rather they are two programs with different code, and Ilia has given the 64-bit version the majority of his development attention.

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)
BCM
Command 32-bit 64-bit Difference
Average -4.525%
bcm -b64 479.609 445.523 -7.107%
bcm -b128 482.308 464.570 -3.678%
bcm -b256 504.725 490.638 -2.791%
bcm -b384 528.030 513.009 -2.845%

BCM saw marginal improvements in the 64-bit version. -b384 was the highest setting I could test, because the 32-bit version was unable to use a blocksize of 512MB

Pages: 1 2 3 4 5 6 7 8 9 10 11 12

§4991 · March 6, 2010 · Tags: , , ·

Leave a Reply