Versions tested: 1, 2, 3, 4, 5, 6, 7, 8p, 9a
Optimal parameters: default
Links: http://www.cs.fit.ed...
Authors: Matt Mahoney
Algorithms: CM, X86
Notable peformances: -

paq

PAQ uses context mixing (CM). The following is a quote from paq8 source code which describes various contexts which are modeled:

paq8 source code

 

(Have info that should be added here? E-mail.)


The programs are described as 'archivers' even though they do not store directory structure.

Disqualified (why) configurations (with qualification ratings)
Ver Rating CPR DPR S.E. R.E. Ratio C. kB/s D. kB/s
<none>
1 57 54 61 28 10 3.271 195 196
2 57 0% -1.9% 0% -11% + 3.324 +1.6% 166 -15% 167 -15%
3 91 +60% +62% +59% +40% +91% 3.380 +1.7% 227 +37% 228 +37%
4 83 -8.8% -9.3% -9.3% -43% +81% 3.642 +7.8% 107 -53% 107 -53%
5 48 -42% -42% -42% -50% -34% 3.703 +1.7% 53 -50% 53 -50%
9a 261 +444% +453% +437% +550% +372% 3.632 -1.9% 346 +553% 338 +538%
-5
6 43 41 46 7 32 3.850 35 35
7 56 +30% +32% +26% +100% 4.072 +5.8% 30 -14% 28 -20%
8p verify error (app1)

Version info

1, tar: yes, mode: 32-bit, crc32: 2604a8cf, decoder: 40 kB, tested: 2010 Apr 22
compression: paq1.exe <cfile> <src>
decompression: paq1.exe <cfile>
2, tar: yes, mode: 32-bit, crc32: c72825c0, decoder: 42 kB, tested: 2010 Apr 22
compression: paq2.exe <cfile> <src>
decompression: paq2.exe <cfile>
3, tar: yes, mode: 32-bit, crc32: e4b19b0b, decoder: 37 kB, tested: 2010 Apr 22
compression: paq3a.exe <cfile> <src>
decompression: paq3a.exe <cfile>
4, tar: yes, mode: 32-bit, crc32: 30d1bb44, decoder: 37 kB, tested: 2010 Apr 22
compression: paq4a.exe <cfile> <src>
decompression: paq4a.exe <cfile>
5, tar: yes, mode: 32-bit, crc32: 975a8ee, decoder: 38 kB, tested: 2010 Apr 22
compression: paq5b.exe <cfile> <src>
decompression: paq5b.exe <cfile>
6, tar: yes, mode: 32-bit, crc32: 7a7d74fa, decoder: 68 kB, tested: 2010 Apr 22
compression: paq6.exe <args> <cfile> <src>
decompression: paq6.exe <cfile>
7, tar: yes, mode: 32-bit, crc32: 444025bb, decoder: 30 kB, tested: 2010 Apr 22
compression: paq7.exe <args> <cfile> <src>
decompression: paq7.exe <cfile>
8p, tar: yes, mode: 32-bit, crc32: 98a95383, decoder: 72 kB, tested: 2010 Apr 22
compression: paq8p.exe <args> <src>
decompression: paq8p.exe -d <cfile>
9a, tar: yes, mode: 32-bit, crc32: 661c53f7, decoder: 17 kB, tested: 2010 Apr 22
compression: paq9a.exe a <args> <cfile> <src>
decompression: paq9a.exe x <cfile>
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