Versions tested: 0.34, 0.35b, 0.39, 1.1
Optimal parameters: L3
Links: http://www.quicklz.com/
Authors: Lasse Reinhold
Algorithms: LZ
Notable peformances: Application3, Image1, Pitches1, Qualifying1, Qualifying2

qpress

qpress is a portable file archiver designed to utilize fast storage systems to their max. It supports
the program website April 13, 2009

 

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


We test the program with TAR mode to avoid time overhead accessing multiple files.

Qualified configurations
Ver Rating CPR DPR S.E. R.E. Ratio C. kB/s D. kB/s
L1
0.34 1 3 0 702 0 1.970 570184 505916
0.35b 1 -5.1% 1.970 0% 537203 -5.8% 483161 -4.5%
0.39 1 +1.8% 1.970 0% 531620 -1.0% 504411 +4.4%
1.1 1 +1.5% 1.970 0% 541536 +1.9% 509515 +1.0%
L2
0.34 4 7 0 710 0 2.111 326381 436264
0.35b 4 -3.0% 2.111 0% 319837 -2.0% 417554 -4.3%
0.39 4 +5.1% 2.111 0% 318384 -0.5% 473089 +13%
1.1 4 -0.1% 2.111 0% 318920 +0.2% 470877 -0.5%
L3
0.34 5 6 2 489 0 2.209 125172 549946
0.35b 5 -2.9% 2.209 0% 123664 -1.2% 498404 -9.4%
0.39 5 +9.3% 2.209 0% 134739 +9.0% 553155 +11%
1.1 5 +0.4% 2.209 0% 134829 +0% 559299 +1.1%

Version info

0.34, tar: yes, mode: 32-bit, crc32: 68e52096, decoder: 59 kB, tested: 2011 Oct 07
compression: qpress-034.exe -T4<args> <src> <cfile>
decompression: qpress-034.exe -T4d <cfile> ./
0.35b, tar: yes, mode: 32-bit, crc32: 2be2a60c, decoder: 59 kB, tested: 2011 Apr 01
compression: qpress-035.exe -T4<args> <src> <cfile>
decompression: qpress-035.exe -T4d <cfile> ./
0.39, tar: yes, mode: 64-bit, crc32: c59aedf6, decoder: 81 kB, tested: 2011 Oct 07
compression: qpress-039_64.exe -T4<args> <src> <cfile>
decompression: qpress-039_64.exe -T4d <cfile> ./
1.1, tar: yes, mode: 64-bit, crc32: 1acf4af7, decoder: 81 kB, tested: 2011 Oct 07
compression: qpress64.exe -T4<args> <src> <cfile>
decompression: qpress64.exe -T4d <cfile> ./