Windows 10: Introducing Brotli compression in Microsoft Edge

  1. Brink's Avatar
    Posts : 18,980
    64-bit Windows 10 Pro build 15063
       20 Dec 2016 #1

    Introducing Brotli compression in Microsoft Edge

    Beginning with EdgeHTML 15.14986, Microsoft Edge supports Brotli as an HTTP content-encoding method. This change will be released to stable builds with the Windows 10 Creator’s Update early next year, but you can preview it now via the Windows Insider Program. With this release, Brotli will be broadly interoperable across browsers, with support in the latest versions of Microsoft Edge, Firefox, and Chrome.

    Brotli is a compression format defined in RFC 7932, previously available as part of the WOFF2 font format. When used as an HTTP content-encoding method, Brotli achieves up to 20% better compression ratios with similar compression and decompression speeds (PDF). This ultimately results in substantially reduced page weight for users, improving load times without substantially impacting client-side CPU costs. As compared to existing algorithms, like Deflate, decompression with Brotli is much less expensive without sacrificing compression ratios.

    In the current preview release, Microsoft Edge supports Brotli on HTTPS and HTTP connections. In a future preview release, we will update this behavior to only advertise Brotli support on HTTPS connections. Like Chrome, we will continue to decode Brotli content on HTTP connections. Note that in the current preview release, there is a known issue which results in the F12 Developer Tools incorrectly not showing the accept encoding response header. This is tracked as issue 9771399 on

    As always, we welcome your feedback on Brotli in Microsoft Edge! Let us know on Twitter or in the comments below if you have any questions or issues. We’re very much looking forward to making the web just a little bit lighter with Brotli!

    ― Rob Trace, Senior Program Manager, Microsoft Edge

    Source: Introducing Brotli compression in Microsoft Edge - Microsoft Edge Dev Blog
      My System SpecsSystem Spec

  2.    21 Dec 2016 #2

    Interesting discussion of Brotli for those interested in understanding why this really is something worth knowing about and using: The current state of Brotli compression.
      My System SpecsSystem Spec


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