10-06-2004, 02:43 AM
Test results for compressed file size:
Code:
Results with Canterbury Corpus (a standard pack of samples for testing compressors)
http://corpus.canterbury.ac.nz/descriptions/#cantrbry
Uncompressed size 2816188 bytes
NNS weakest 2391654 bytes 85% it choose RLE
NNS Normal 1809722 bytes 64% it choose RLE-BAC-RLE mainly
NNS Strongest 1599498 bytes 57% choose a different combination for each file!!
.tar.gz 739071 bytes 26% I downloaded the samples in this format..
winzip 7.0 strongest 732163 bytes 26%
bzip2 1.0.1 542722 bytes 19% http://www.digistar.com/bzip2/
rar 3.0 strongest 419750 bytes 15%
Both winzip and bzip would rate better if they were able to create an archive file
and then compress it as it does winrar.
Antoni