this post was submitted on 06 Jun 2024
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    931
    the fear of missing out a better compression (lemmy.world)
    submitted 4 months ago by Krafting@lemmy.world to c/linuxmemes@lemmy.world
    197 comments fedilink hide all child comments
     

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    [–] frezik@midwest.social 95 points 4 months ago (4 children)

    Zip makes different tradeoffs. Its compression is basically the same as gz, but you wouldn't know it from the file sizes.

    Tar archives everything together, then compresses. The advantage is that there are more patterns available across all the files, so it can be compressed a lot more.

    Zip compresses individual files, then archives. The individual files aren't going to be compressed as much because they aren't handling patterns between files. The advantages are that an error early in the file won't propagate to all the other files after it, and you can read a file in the middle without decompressing everything before it.

    [–] herrvogel@lemmy.world 13 points 4 months ago

    Yeah that's a rather important point that's conveniently left out too often. I routinely extract individual files out of large archives. Pretty easy and quick with zip, painfully slow and inefficient with (most) tarballs.

    [–] QuaternionsRock@lemmy.world 3 points 4 months ago

    Can you evaluate the directory tree of a tar without decompressing? Not sure if gzip/bzip2 preserve that.

    [–] fmstrat@lemmy.nowsci.com 1 points 4 months ago* (last edited 4 months ago) (1 children)

    Nowhere in here do you cover bzip, the subject of this meme. And tar does not compress.

    [–] frezik@midwest.social 7 points 4 months ago (1 children)

    It's just a different layer of compression. Better than gzip generally, but the tradeoffs are exactly the same.

    [–] fmstrat@lemmy.nowsci.com 2 points 4 months ago

    Well, yes. But your original comment has inaccuracies due to those 2 points.