Versions tested: 4.20, 9.12b
Optimal parameters: -m0=lzma2 -mx -md15m
Links: http://7-zip.com
Authors: Igor Pavlov, Dmitry Shkarin
Algorithms: LZ+ARI, X86
Notable peformances: Application1, Application3, Game2, Qualifying1

7-zip

LZMA is default and general compression method of 7z format. The main features of LZMA method:

the program website 2009, March 28

 

The program is featured in the bzip2 benchmark.

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Qualified configurations
Ver Rating CPR DPR S.E. R.E. Ratio C. kB/s D. kB/s
<none>
4.20 100 100 100 71 10 3.764 2069 24484
9.12b 375 +275% +286% +180% +117% +720% 4.098 +8.9% 3614 +75% 31040 +27%
-m0=lzma2 -mx -md15m
9.12b 491 527 271 205 106 4.087 5053 30821
-mx -md48m
9.12b 395 398 372 133 116 4.232 2807 31043
-mx -md4m
9.12b 252 263 171 141 35 3.904 3844 29728
-mx1
9.12b 60 79 15 169 0 3.135 11645 26713
-mx1 -md48m
9.12b 178 190 104 145 14 3.695 4726 30733
-mx3
9.12b 109 128 40 167 3 3.389 7839 28972

Version info

4.20, tar: no, mode: 32-bit, crc32: 57e325bc, decoder: 173 kB, tested: 2010 Apr 13
compression: 7za.exe a <args> <cfile> <src>
decompression: 7za.exe x <cfile>
9.12b, tar: no, mode: 64-bit, crc32: b0021ec3, decoder: 147 kB, tested: 2010 Apr 13
compression: 7z.exe a <args> -mmt4 <cfile> <src>
decompression: 7z.exe x -mmt4 <cfile>