| Versions tested: | 1.24, 1.27, 1.27b |
| Optimal parameters: | default |
| Links: | http://christian.mar... |
| Authors: | Christian Martelock |
| Algorithms: | X86, LZP+HUF |
| Notable peformances: | Qualifying2, Source1 |
Slug is a file-to-file compressor focusing on ultra fast, but still nice compression.the program website March 28, 2009Since version 1.2+ Slug does not use LZ77 anymore, but a distant variation of reduced-offset-LZ (aka ROLZ). Besides its ROLZ-nature, Slug employs an order-0 semi-dynamic huffman coder. The huffman-tree gets rebuilt every ~4K symbols with smaller steps at the beginning of a file. Slug uses a non-sliding window of 8M which enables its ROLZ-engine to gear up.
The tool is designed in pure C++ using GCC as a compiler. All ROLZ-versions are around two times slower than their LZ77 parts. Still, Slug is a couple of times faster than good old ZIP while providing similar compression most of the time. On small files Slug does not perform as good as e.g. ZIP.
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| Ver | Rating | CPR | DPR | S.E. | R.E. | Ratio | C. kB/s | D. kB/s | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <none> | ||||||||||||
| 1.24 | 41 | 75 | 6 | 391 | 1 | 2.727 | 62578 | 64394 | ||||
| 1.27 | 43 | +4.9% | +12% | +2.3% | 2.735 | +0.3% | 67471 | +7.8% | 60895 | -5.4% | ||
| 1.27b | 63 | +47% | +45% | + | +9.8% | + | 2.819 | +3.1% | 65750 | -2.6% | 59424 | -2.4% |