Versions tested: 1
Optimal parameters: -
Authors: Matt Mahoney
Algorithms: BWT+CM
Notable peformances: -


The compression format is a memory efficient Burrows-Wheeler Transform (BWT) followed by a PAQ-like compression using a single order-0 context (no mixing) followed by 5 more adaptive stages with low order contexts, and bitwise arithmetic coding.

the source code


The compressor is featured in the BWT comparison.

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Disqualified (why) configurations (with qualification ratings)
Ver Rating CPR DPR S.E. R.E. Ratio C. kB/s D. kB/s
1 27 14 160 17 3 3.142 75 757
1 freezes due to bwt string sort (app1)
1 freezes due to bwt string sort (app1)

Version info

1, tar: yes, mode: 32-bit, crc32: 8e180f3d, decoder: 19 kB, tested: 2010 Apr 19
compression: bbb.exe <args> <src> <cfile>
decompression: bbb.exe d <cfile> <src>