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XZ 5.2 Adds New Multi-Threaded Options

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  • #11
    I wanted to take a look at some more detailed info of how to use that decompression method. Looked up README

    http://git.tukaani.org/?p=xz.git;a=b...f0a173;hb=HEAD and found this:

    "XZ Utils doesn't support multithreaded compression or decompression yet. It has been planned though and taken into account when designing the .xz file format."

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    • #12
      They probably just forgot to update README.

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      • #13
        Has anyone got mult-threaded decompression to work? I downloaded and compiled the 5.2.0 stable release of XZ Utils. Multi-threaded compression works but I can't seem to get multi-threaded decompression to work.

        Interestingly, a file compressed with multiple threads using xz can be decompressed with multiple threads using Pixz (https://github.com/vasi/pixz).

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        • #14
          Originally posted by guido12 View Post
          Has anyone got mult-threaded decompression to work? I downloaded and compiled the 5.2.0 stable release of XZ Utils. Multi-threaded compression works but I can't seem to get multi-threaded decompression to work.

          Interestingly, a file compressed with multiple threads using xz can be decompressed with multiple threads using Pixz (https://github.com/vasi/pixz).
          Just started experimenting and observed the same things. What gives?

          Even tried pixz for compression and xz -d --threads=0 for decompression.

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          • #15

            Documented that threaded decompression hasn't been implemented yet. A 5.2.0 NEWS entry describing multi-threading support had incorrectly said "decompression" when it should have said "compression".

            http://git.tukaani.org/?p=xz.git;a=b...f=NEWS;hb=HEAD

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            • #16
              That's quite annoying... When do they plan to implement multithreaded decompression?

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