Those results sound about right to me. However, I am curious what level of compression you used for the Zip and 7Zip files. I just tested a graphics rich PDF and it appears Archiver treated it as a graphics file and did not compress the file at all. Zip, 7Zip, RAR, TAR/GZ all were the same regardless of the selected compression level or chosen algorithm.

NOTE FOR INFORMATION

The difference in compression levels is a function of the size of the "window" the algorithm searches for matching data patterns. The larger the window, the greater the amount of compression that is possible and the longer it takes to compress or decompress the file.


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fill your head with information"
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