Versions tested: 1.00
Optimal parameters: cmid.cfg
Links: http://www.cs.fit.ed...
Authors: Matt Mahoney
Algorithms: CM, X86, LZP
Notable peformances: -

zpaq

ZPAQ is a proposed open standard for highly compressed data, currently under development. When completed, all versions will remain compatible, even as new compression algorithms are developed. ZPAQ compressed files and archives contain a description of the compression algorithm, allowing older programs to extract files produced by newer programs.
the program website 2009, March 11

 

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The program does not store directory tree, therefore TAR is used.

Disqualified (why) configurations (with qualification ratings)
Ver Rating CPR DPR S.E. R.E. Ratio C. kB/s D. kB/s
cmax.cfg
1.00 108 101 114 22 65 3.757 106 106
cmid.cfg
1.00 148 139 157 49 44 3.465 292 293
cmin.cfg
1.00 26 28 24 133 0 2.419 2920 2253

Version info

1.00, tar: yes, mode: 32-bit, crc32: 7aa8ec31, decoder: 21 kB
compression: zpaq.exe <args> <cfile> <src>
decompression: unzpaq1.exe x <cfile>
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