> > Drive by question: Given that the codec is going to be in the browser, are > there plans to surface this up to CompressionStreams? (same question > applies for Brotli, I suppose)
For the zstd Content-Encoding, we will only be linking in the decompression part of the zstd library. But for CompressionStreams, supporting a format only for decompression and not for compression is likely to confuse and frustrate developers. So while I'd like to add Zstd to CompressionStreams, we'll need a good justification for the extra binary size increase caused by linking in the compression code. The same applies to Brotli. Thanks for the question! On Wed, 21 Jun 2023 at 18:53, Sangwhan Moon <[email protected]> wrote: > > > On 2023年06月21日 18時02分49秒 (+09:00), Nidhi Jaju wrote: > > > > On Wed, Jun 21, 2023 at 3:35 PM Yoav Weiss <[email protected]> wrote: > >> >> >> On Wed, Jun 21, 2023 at 8:15 AM Nidhi Jaju <[email protected]> >> wrote: >> >>> Contact [email protected] >>> >>> Explainer >>> https://docs.google.com/document/d/1aDyUw4mAzRdLyZyXpVgWvO-eLpc4ERz7I_7VDIPo9Hc/edit?usp=sharing >>> Specificationhttps://datatracker.ietf.org/doc/html/rfc8878 >>> >>> Design docs >>> https://docs.google.com/document/d/14dbzMpsYPfkefAJos124uPrlkvW7jyPJhzjujSWws2k/edit?usp=sharing >>> >>> Summary >>> >>> Zstandard, or “zstd”, is a data compression mechanism described in >>> RFC8878. It is a fast lossless compression algorithm, targeting real-time >>> compression scenarios at zlib-level and better compression ratios. The >>> "zstd" token was added as an IANA-registered Content-Encoding token as per >>> https://datatracker.ietf.org/doc/html/rfc8878#name-content-encoding. >>> Adding support for "zstd" as a Content-Encoding will help load pages faster >>> and use less bandwidth. >>> >>> Blink componentInternals>Network >>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3ENetwork> >>> >>> Motivation >>> >>> Supporting zstd content-encoding in the browser would allow sites to >>> spend less time and CPU/power on compression on their servers, resulting in >>> reduced server costs. There are several published benchmarks[i.e. 1 >>> <https://facebook.github.io/zstd/#benchmarks>, 2 >>> <https://peazip.github.io/fast-compression-benchmark-brotli-zstandard.html>] >>> and existing research showing promising potential wins. Zstd is roughly >>> three times faster than Brotli for decompression. Combined with zstd being >>> faster at compression, this will result in faster page load times. >>> Initial public proposalNone >>> >>> TAG reviewNone >>> >> > Drive by question: Given that the codec is going to be in the browser, are > there plans to surface this up to CompressionStreams? (same question > applies for Brotli, I suppose) > > >>> >>> TAG review statusNot applicable >>> >>> Risks >>> >>> Interoperability and Compatibility >>> >>> Servers that have a broken implementation of zstd might exist, but the >>> risk of this is small. Additionally, middleware and middleboxes like virus >>> checkers that intercept HTTPS connections might not support zstd, but might >>> fail to remove it from the Accept-Encoding header in the request. >>> >> >> Are we planning to only support this encoding under secure contexts >> and/or H2+ to reduce that risk? >> > > Yes, we're only planning to support zstd encoding under secure contexts, > same as Brotli. > > >> >> >>> >>> >>> *Gecko*: No signal ( >>> https://github.com/mozilla/standards-positions/issues/775) >>> >>> *WebKit*: No signal ( >>> https://github.com/WebKit/standards-positions/issues/168) >>> >>> *Web developers*: Positive (https://crbug.com/1246971) Facebook (Yann) >>> and Akamai (Nic) seem to be positive about zstd content-encoding support in >>> the browser. Facebook is also excited to test the feature. >>> >>> *Other signals*: >>> >>> WebView application risks >>> >>> Does this intent deprecate or change behavior of existing APIs, such >>> that it has potentially high risk for Android WebView-based applications? >>> >>> >>> >>> Debuggability >>> >>> No special support needed. >>> >>> Is this feature fully tested by web-platform-tests >>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> >>> ?Not yet. >>> >>> Flag nameZstdContentEncoding >>> >>> Requires code in //chrome?True >>> >>> Tracking bug >>> https://bugs.chromium.org/p/chromium/issues/detail?id=1246971 >>> >>> Estimated milestones >>> Shipping on desktop 117 >>> Shipping on Android 117 >>> >>> Link to entry on the Chrome Platform Status >>> https://chromestatus.com/feature/6186023867908096 >>> >>> Links to previous Intent discussions >>> >>> This intent message was generated by Chrome Platform Status >>> <https://chromestatus.com/>. >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "blink-dev" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAMZNYANd_E77W1ki--h_XJM-%2B_fA3w1CriGgJmnbh1N3LwRDtw%40mail.gmail.com >>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAMZNYANd_E77W1ki--h_XJM-%2B_fA3w1CriGgJmnbh1N3LwRDtw%40mail.gmail.com?utm_medium=email&utm_source=footer> >>> . >> >> -- > You received this message because you are subscribed to the Google Groups > "blink-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAMZNYAN%3DdFzxxXGt%2BTscR9zfu-dF38u_E4rQ7ynv8C%3D1C67YPA%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAMZNYAN%3DdFzxxXGt%2BTscR9zfu-dF38u_E4rQ7ynv8C%3D1C67YPA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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