On 5/6/22 8:10 AM, Yutaka Hirano wrote:


        Contact emails

yhir...@chromium.org


        Explainer

None


        Specification

https://wicg.github.io/compression/ <https://wicg.github.io/compression/>

https://github.com/wicg/compression/pull/43 <https://github.com/wicg/compression/pull/43>(spec PR)

https://chromium-review.googlesource.com/c/chromium/src/+/3586945 <https://chromium-review.googlesource.com/c/chromium/src/+/3586945>(impl and tests)


        Summary

Add a new compression format, "deflate-raw", to give web developers access to the raw deflate stream without any headers or footers. This is needed, for example, to read/write zip files.



        Blink component

Blink>Network>StreamsAPI <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ENetwork%3EStreamsAPI>


        TAG review

This is subtle enough for a separate TAG review.

Do you intend to file one? Or is the above missing a "not"?


        TAG review status

Not applicable


        Risks


        Interoperability and Compatibility

This is a new addition and doesn’t change any existing behaviors.


Gecko: No signal

(See the bottom of https://github.com/mozilla/standards-positions/issues/207)

I pinged that thread to ask if they would prefer us to open a new issue - Compression Streams was marked as "worth prototyping", but that was before "deflaw-raw" existed in the spec.

WebKit: No signal

(See https://lists.webkit.org/pipermail/webkit-dev/2022-May/032213.html)


Web developers: Positive

https://github.com/wicg/compression/issues/25 <https://github.com/wicg/compression/issues/25>


Google Sheets <http://sheets.google.com>


Google sheets team uses zipping for conversion (client side) of google sheet into different formats such as xlsx. Browser native compression/decompression stream apis have much better performance than using any js library for zipping.

With support for “deflate-raw” format, we are able to use compression/decompression stream apis for compression of files during zipping in a much simpler way compared to “gzip”, “deflate” format which required workarounds on our side.



Other signals:


        WebView application risks

None.



        Debuggability

None


        Is this feature fully tested by web-platform-tests
        
<https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>?

Yes


        Flag name



        Requires code in //chrome?

False


        Tracking bug

https://crbug.com/1271220 <https://crbug.com/1271220>


        Estimated milestones

103


        Anticipated spec changes

None



        Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5172771293233152 <https://chromestatus.com/feature/5172771293233152>


        Links to previous Intent discussions

Intent to prototype: https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CABihn6GYcF5VsvfgEDpYL0rCvxQV9phxwFtJ-FxbTEbqPtJxbg%40mail.gmail.com <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/cabihn6gycf5vsvfgedpyl0rcvxqv9phxwftj-fxbtebqptj...@mail.gmail.com>



This intent message was generated by Chrome Platform Status <https://chromestatus.com/>.


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