LGTM2

On 2/13/25 11:30 AM, Chris Harrelson wrote:
LGTM1

On Thu, Feb 13, 2025 at 7:38 AM Shu-yu Guo <s...@chromium.org> wrote:

    Yep, shipping Float16Array will make those tests pass. There is
    virtual test suite you can see that has the updated expectations
    once the feature ships. E.g. here's fetch's response-headers tests
    
<https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/virtual/float16array-enabled/external/wpt/fetch/api/basic/request-headers.any-expected.txt;drc=ec42d9a27be16cfee08490a1db43924d375cfab1>.

    On Wed, Feb 12, 2025 at 8:55 PM Domenic Denicola
    <dome...@chromium.org> wrote:

        On Thursday, February 13, 2025 at 12:21:13 PM UTC+9
        Chromestatus wrote:

            Contact emails s...@chromium.org, seo...@chromium.org

            Explainer None

            Specification https://tc39.es/proposal-float16array
            <https://tc39.es/proposal-float16array>

            Summary

            Adds the Float16Array typed array. Number values are
            rounded to IEEE fp16 when writing into Float16Array instances.



            Blink component Blink>JavaScript>Language
            
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EJavaScript%3ELanguage%22>


            TAG review None

            TAG review status Not applicable

            Risks


            Interoperability and Compatibility

            None.



            /Gecko/: Shipped/Shipping
            (https://www.mozilla.org/en-US/firefox/129.0/releasenotes
            <https://www.mozilla.org/en-US/firefox/129.0/releasenotes>)

            /WebKit/: Shipped/Shipping
            
(https://developer.apple.com/documentation/safari-technology-preview-release-notes/stp-release-202
            
<https://developer.apple.com/documentation/safari-technology-preview-release-notes/stp-release-202>)


            /Web developers/: No signals

            /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?

            None



            Debuggability

            Debuggable like the existing typed array constructors



            Will this feature be supported on all six Blink platforms
            (Windows, Mac, Linux, ChromeOS, Android, and Android
            WebView)? Yes

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

            In test262: https://github.com/tc39/test262/pull/3849
            <https://github.com/tc39/test262/pull/3849>



        Note that there are also a good number of WPTs that check that
        Float16Arrays are supported in web APIs. For example,
        
https://wpt.fyi/results/WebCryptoAPI/getRandomValues.any.html?label=experimental&label=master&aligned
        
<https://wpt.fyi/results/WebCryptoAPI/getRandomValues.any.html?label=experimental&label=master&aligned>
        or
        
https://wpt.fyi/results/fetch/api/basic/request-headers.any.html?label=experimental&label=master&aligned
        
<https://wpt.fyi/results/fetch/api/basic/request-headers.any.html?label=experimental&label=master&aligned>
        .

        Canary with experimental web platform features is currently
        failing these. Can you confirm that shipping Float16Array per
        this Intent will be enough to make these pass? Or would there
        be additional work necessary?


            Flag name on about://flags --js-float16array

            Finch feature name V8Flag_js_float16array

            Requires code in //chrome? False

            Tracking bug https://issues.chromium.org/issues/42203953
            <https://issues.chromium.org/issues/42203953>

            Estimated milestones Shipping on desktop 135 DevTrial on
            desktop 124 Shipping on Android 135 DevTrial on Android
            124 Shipping on WebView 135

            Anticipated spec changes

            Open questions about a feature may be a source of future
            web compat or interop issues. Please list open issues
            (e.g. links to known github issues in the project for the
            feature specification) whose resolution may introduce web
            compat/interop risk (e.g., changing to naming or structure
            of the API in a non-backward-compatible way).

            None

            Link to entry on the Chrome Platform Status
            
https://chromestatus.com/feature/5164400693215232?gate=6205029258887168
            
<https://chromestatus.com/feature/5164400693215232?gate=6205029258887168>


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

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