From: Josef 'Jupp' Schugt <jupp@...>
Date: 2008-02-19T10:30:01+09:00
Subject: Re: OT: Why are .zip files so much bigger than tar.gz files?

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* Trans, 2008-02-19, 08:53:

> So I has started to offer .zip packages of my projects to make life a
> little easier for Windows folks --seeing as it's no sweat off the
> backs of Linux folks either (unzip) --but then I noticed that zip
> files are huge. I have a 1MB tar.gz that's over 3MB as a .zip. Can
> that really be right?

Not if done correctly. Hack is as follows:

1. Create zip without using compression
2. Zip that one into a new zip using maximum compression

This does not deal with the issue that zip has an inferior compression
rate compared to bz2 but at least allows to make use of cross-file
redundancy (zip packs each file individually).

7zip and rar are superior to zip but less commonly supported.

HTH

Josef 'Jupp' Schugt
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