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WOFF 2.0 (Brotli) Compression Update

From: David Kuettel <kuettel@google.com>
Date: Wed, 6 Nov 2013 11:03:43 -0800
Message-ID: <CAAYUqgExqc6cLHdajqavU_nq-fXj=EUU2-YZKuMUEEPngikrNA@mail.gmail.com>
To: "public-webfonts-wg@w3.org" <public-webfonts-wg@w3.org>
Hello Working group,

A quick update on several fronts.

:::: Google Compression team (Brotli) update ::::

Technical update

We have worked on simplifying the Brotli format, with ~30 %
decompression speed gains for a text corpus (now 220 MB/s for an
international html data set). The new format is not bit-stream
compatible with the old format. We plan to push these changes within a

We have added a UTF8 context model for good text compression. Brotli
compression density is within 3 % to LZMA for our text corpus.

Project planning & specification update

We are on track to publish a first rough draft of the specification in
two weeks. This version of the spec will not be completely stable as
we are still making changes to the format.

The intent is to give everyone a chance to provide feedback on that
draft before or just after the US Thanksgiving holiday, aligned with
the availability of the forthcoming code push.

We'll continue working on both the codebase and the spec until
mid-December and provide a new release of the spec then, with a goal
of receiving feedback by early January. We hope to finalise the spec
later that month, ready for standards work to begin early in 2014.

:::: WOFF 2.0 (w/ Brotli) update ::::

We are working on open-sourcing the new WOFF 2.0 (w/ Brotli)
converter, targeting having it out in a week or two.

:::: IETF / Standards track ::::

Seeking internal guidance on whether/how to submit a proposal to the
IETF for Brotli.

Thank you,
David (on behalf of the extended team)
Received on Wednesday, 6 November 2013 19:04:31 UTC

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