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Google Zürich also did Zopfli, a DEFLATE-compliant compressor that gets better ratios than gzip by taking longer to compress. Apparently Zopfli = small sweet b

Google Zürich also did Zopfli, a DEFLATE-compliant compressor that gets better ratios than gzip by taking longer to compress. Apparently Zopfli = small sweet breat https://en.wikipedia.org/wiki/Zopfli https://en.wikipedia.org/wiki/Zopfli

codetrotter 3y ago
They should do XZli next :D And write it in Rust
- JyrkiAlakuijala 3y ago
  Brotli:11 gets within 0.6 % of LZMA density but decodes 3–5x faster.
  - codetrotter 3y ago
    Yeah. But it seems to be most widely used in web browsers. I’ve never seen a .tar.br file, but I frequently download .tar.xz files. And therefore, a Rust implementation by Google of xz compression and decompression would be most welcome :)
- tialaramex 3y ago
  All of the data transformation (codecs, compression etc.) libraries should be in WUFFS. That's exactly what it's for, and unlike the C++ this was written in, or indeed Rust, it's able to provide real compile time safety guarantees for the very affordable price of loss of generality (that is, you can't use WUFFS to write your video game, web browser, word processor, operating system or whatever) For example in C++ array[index] has Undefined Behaviour on a bounds miss. Rust's array[index] will panic at runtime on a bounds miss, at least we know what will happen but what happens isn't great... WUFFS array[index] will not compile if it could incur a bounds miss. Show the compiler why index will be a value that's always in-bounds when the index occurs.
  - haneefmubarak 3y ago
    It appears that XZ actually is in WUFFS! https://github.com/google/wuffs/tree/main/std/xz https://github.com/google/wuffs/tree/main/std/xz
    - nigeltao 3y ago
      Yeah, it's just a coincidence (†), but I started working on Wuffs' LZMA and XZ decoders last December. It works well enough to decode the Linux source code tarball correctly (producing the same output as /usr/bin/xz). $ git clone --quiet --depth=1 https://github.com/google/wuffs.git $ gcc -O3 wuffs/example/mzcat/mzcat.c -o my-mzcat $ ./my-mzcat < linux-6.8.2.tar.xz | sha256sum d53c712611ea6cb5acaf6627a84d5226692ae90ce41ee599fcc3203e7f8aa359 - $ /usr/bin/xz -d < linux-6.8.2.tar.xz | sha256sum d53c712611ea6cb5acaf6627a84d5226692ae90ce41ee599fcc3203e7f8aa359 - (†) Also, I'm not "Jia Tan"! You're just going to have to trust me on both of those claims. :-/
      - kuschku 3y ago
        > Also, I'm not "Jia Tan"! You're just going to have to trust me on both of those claims. :-/ No need to trust – it's actually easily verified :) Your activity pattern (blue) is entirely different than jia tan's (orange): https://i.k8r.eu/vRRvVQ.png https://i.k8r.eu/vRRvVQ.png (Each day is a row, each column is an hour in UTC. A pixel is filled if a user made a commit, wrote a comment, etc during that hour)
        rpacut 3y ago
        [dead]
        Squeeeez 3y ago
        So, if one person were to login to one account for a certain time, and then switch accounts for a few hours... Hmmm :o)
        3y ago
occamrazor 3y ago
Zopf means “braid” and it also denotes a medium-size bread type, made with some milk and glazed with yolk, shaped like a braid, traditionally eaten on Sunday.

codetrotter 3y ago

They should do XZli next :D And write it in Rust

JyrkiAlakuijala 3y ago
Brotli:11 gets within 0.6 % of LZMA density but decodes 3–5x faster.
- codetrotter 3y ago
  Yeah. But it seems to be most widely used in web browsers. I’ve never seen a .tar.br file, but I frequently download .tar.xz files. And therefore, a Rust implementation by Google of xz compression and decompression would be most welcome :)
tialaramex 3y ago
All of the data transformation (codecs, compression etc.) libraries should be in WUFFS. That's exactly what it's for, and unlike the C++ this was written in, or indeed Rust, it's able to provide real compile time safety guarantees for the very affordable price of loss of generality (that is, you can't use WUFFS to write your video game, web browser, word processor, operating system or whatever) For example in C++ array[index] has Undefined Behaviour on a bounds miss. Rust's array[index] will panic at runtime on a bounds miss, at least we know what will happen but what happens isn't great... WUFFS array[index] will not compile if it could incur a bounds miss. Show the compiler why index will be a value that's always in-bounds when the index occurs.
- haneefmubarak 3y ago
  It appears that XZ actually is in WUFFS! https://github.com/google/wuffs/tree/main/std/xz https://github.com/google/wuffs/tree/main/std/xz
  - nigeltao 3y ago
    Yeah, it's just a coincidence (†), but I started working on Wuffs' LZMA and XZ decoders last December. It works well enough to decode the Linux source code tarball correctly (producing the same output as /usr/bin/xz). $ git clone --quiet --depth=1 https://github.com/google/wuffs.git $ gcc -O3 wuffs/example/mzcat/mzcat.c -o my-mzcat $ ./my-mzcat < linux-6.8.2.tar.xz | sha256sum d53c712611ea6cb5acaf6627a84d5226692ae90ce41ee599fcc3203e7f8aa359 - $ /usr/bin/xz -d < linux-6.8.2.tar.xz | sha256sum d53c712611ea6cb5acaf6627a84d5226692ae90ce41ee599fcc3203e7f8aa359 - (†) Also, I'm not "Jia Tan"! You're just going to have to trust me on both of those claims. :-/
    - kuschku 3y ago
      > Also, I'm not "Jia Tan"! You're just going to have to trust me on both of those claims. :-/ No need to trust – it's actually easily verified :) Your activity pattern (blue) is entirely different than jia tan's (orange): https://i.k8r.eu/vRRvVQ.png https://i.k8r.eu/vRRvVQ.png (Each day is a row, each column is an hour in UTC. A pixel is filled if a user made a commit, wrote a comment, etc during that hour)
      - rpacut 3y ago
        [dead]
      - Squeeeez 3y ago
        So, if one person were to login to one account for a certain time, and then switch accounts for a few hours... Hmmm :o)
        3y ago

occamrazor 3y ago

Zopf means “braid” and it also denotes a medium-size bread type, made with some milk and glazed with yolk, shaped like a braid, traditionally eaten on Sunday.