Author: Yakov Konoval
Date: 04:03:18 10/27/05
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On October 26, 2005 at 20:27:19, Dann Corbit wrote: >On October 20, 2005 at 10:56:15, Joshua Shriver wrote: > >>Interesting, a thought on compression though. Why not use bz2? It's just as easy >>to implement as zip and has better compression. > >Bzip2 is horribly slow, both for compressing and decompressing. > >The extra compression gained is a small percentage. Fine for web or ftp sites, >but (I guess) a bad choice for EGTB compression. > I did some experiments with bzip2-library. It's really slow, but gives much better (about 60-80%) compression in comparison with zlib-library. >7-Zip has lots of algorithms implemented (including bzip2.) The license is a >bit unclear to me. > AFAIK 7-Zip LZMA SDK has a very effective LZMA-algorithm, but using of this library is really unclear. Only 2 functions are needed for EGTB-generator- compression/decompression of 1 block in the RAM, but there are no such fuctions in lzma.dll. >This looks very interesting (although license is only GPL or commercial): >http://www.oberhumer.com/opensource/lzo/ > >What is wanted in a case like EGTB is very fast decompression and very good >compression. The main criteria for generation is very fast compression/decompression, but for the final study of generation the best compression is needed. Yakov
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