Ready for Trial: Compute Pressure

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Mandy, Arnaud

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Dec 21, 2022, 5:23:24 AM12/21/22

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Summary

Provides a way for websites to react to changes in the CPU pressure of the target device, such that websites can trade off resources for an improved user experience.

Blink component

Blink>PerformanceAPIs>ComputePressure

Search tags

compute pressure

TAG review

TAG review status

Pending

Risks

Interoperability and Compatibility

Gecko: No signal (https://github.com/mozilla/standards-positions/issues/521)

WebKit: Negative (https://lists.webkit.org/pipermail/webkit-dev/2021-May/031845.html) This issue has been taken into account: https://github.com/WICG/compute-pressure/issues/24

Web developers: No signals

Other signals:

Security

https://github.com/WICG/compute-pressure/issues/79

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?

Goals for experimentation

This API provides device-specific information and has been designed to provide useful and actionable metrics while preserving user privacy. We'd like to see if the information provided provides the user experience improvement sought after and if the shape matches developer expectations. We will measure API usage metrics and obtain developer feedback to validate our designs. We'll focus on feedback on UX changes on lower-powered devices specifically.

Ongoing technical constraints

Debuggability

chrome-internals://compute-pressure

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

Is this feature fully tested by web-platform-tests?

Yes

DevTrial instructions

https://github.com/WICG/compute-pressure/blob/main/HOWTO.md

Flag name

see https://github.com/WICG/compute-pressure/blob/main/HOWTO.md

Requires code in //chrome?

False

Tracking bug

https://crbug.com/1067627

Launch bug

https://crbug.com/1173266

Estimated milestones

DevTrial on desktop

109

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5597608644968448

Links to previous Intent discussions

Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/LTIRZ24C5Os/m/BPSeJ8y0BwAJ
Intent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/HzVV-sM97T0

Arnaud Mandy