What does HackerNews think of 7-Zip-zstd?

7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard

Language: C

Zip – How not to design a file format (2021) | Oct 2023
Do you consider rar a standard? It's a pretty good format, even though there aren't any good open-source implementations. But if you're willing to pay for your software, WinRAR command line versions are available for most platforms.

7zip is the most obvious free alternative. There is also a 7zip fork that offers zstd [1]. The command line experience for 7zip isn't very good however.

1: https://github.com/mcmilk/7-Zip-zstd

Show HN: pzip- blazing fast concurrent zip archiver and extractor | Sep 2023
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Testing with 100 MB set from mattmahoney.net and relatively comparable sizes pzip is twice as fast as the previously mentioned Pavlov's 7z, that's clearly useful for those who need the fastest possible creation of a "classic" zip with compressed files, when lower compression ratio (1.6 MB bigger compressed file when compressing 100 MB set, compared to 7z) is acceptable.

    $ time zip -2 -r a-zip.zip 100mb/ >/dev/null
    real user sys: 2,1 1,8 0,1 
    $ time 7z -tzip -mx=1 a a-7z-1.zip 100mb/ >/dev/null
    real user sys: 1,0 2,7 0,0 
    $ time ../pzip a-pzip.zip 100mb/ >/dev/null
    real user sys: 0,5 1,0 0,1 
    $ L a
    48197707 a-7z-1.zip
    49921626 a-pzip.zip
    49553097 a-zip.zip
If the "classic" (i.e. the goal to unpack the archive using older programs) compatibility is not important, it could be interesting to consider that at least since 2020 zstd is officially a "standard" method for ZIP files too, allowing even faster compression speed for the same compression size targets.

    93 - Zstandard (zstd) Compression
https://pkware.cachefly.net/webdocs/APPNOTE/APPNOTE-6.3.9.TX...

I'm aware that there are some attempts of modifications of 7zip to allow using that method in ZIP files, but I don't know more than that:

https://github.com/mcmilk/7-Zip-zstd

https://github.com/mcmilk/7-Zip-zstd/issues/132

https://github.com/libarchive/libarchive/issues/1403

If ZIP target format is not a condition, here's the speed of using zstd on tar for the same input and approximately the same resulting size:

    time tar -c 100mb | zstd -2 -o a.tar.zst 2>/dev/null
    real user sys: 0,4 0,4 0,1 
    48585639 a.tar.zst
LZ4, an Extremely Fast Compression Algorithm | Jan 2021
Here’s a fork of the Windows compression tool 7-Zip which has LZ4 support baked in along with some other useful algorithms – the repo has a good comparison of them: https://github.com/mcmilk/7-Zip-zstd/

(Linking to this more for the overview than the Windows tool in itself.)

PeaZip – A free cross-platform file archiver utility | May 2019
I’ve been using 7z for many years and https://github.com/mcmilk/7-Zip-zstd/ which is just a patched 7z for a while. And p7zip on unix platforms.

I know PeaZip is based on that, so I wonder what made you choose this over 7z?

Zstandard v1.4.0 | Apr 2019
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GP mentioned this fork of 7-Zip with zstd support:

- https://github.com/mcmilk/7-Zip-zstd

The changes to the 7-Zip file format were discussed upstream, and upstream agreed to not tread on the magic values:

- https://sourceforge.net/p/sevenzip/discussion/45797/thread/a...

But ultimately the patches were not upstreamed. It's now onto its second developer:

- https://sourceforge.net/p/sevenzip/discussion/45797/thread/6...
Better Compression with Zstandard | Mar 2017
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Do you mean this ? https://github.com/mcmilk/7-Zip-zstd