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Explainer https://github.com/WICG/performance-measure-memory Specification https://github.com/WICG/performance-measure-memory Design docs Original docs: https://web.dev/monitor-total-page-memory-usage https://github.com/WICG/performance-measure-memory/blob/master/ORIGIN_TRIAL.md Summary performance.measureUserAgentSpecificMemory() is specified to only be available in cross-origin isolated environments (behind COOP/COEP). This is a request for removing the COOP/COEP restriction for a limited amount of time from M120 to M121. This is to allow partners that adopted WasmGC on WebWorkers to perform regression tests in the wild as well as measure their impact. These partners are not fully ready to deploy COOP/COEP. Note that performance.memory (legacy API) cannot be used for this purpose as it was never enabled on workers. The timeline has been adjusted to match the OT for SharedArrayBuffer on non-isolated pages. Blink component Blink>PerformanceAPIs <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EPerformanceAPIs> Search tags JavaScript memory <https://chromestatus.com/features#tags:JavaScript%20memory>, crossOriginIsolated <https://chromestatus.com/features#tags:crossOriginIsolated>, performance.measureMemory() <https://chromestatus.com/features#tags:performance.measureMemory()> TAG review - TAG review status - Chromium Trial Name MeasureMemory Link to origin trial feedback summary - Origin Trial documentation link - Risks This area is unchanged from the original launch. Interoperability and Compatibility The actual memory usage of a web page is not comparable across browsers. The granularity of memory usage breakdown will differ across browsers. Gecko: Under consideration ( https://github.com/mozilla/standards-positions/issues/281) WebKit: No signal ( https://lists.webkit.org/pipermail/webkit-dev/2020-April/031160.html) Web developers: Positive ( https://docs.google.com/document/d/1u21oa3-R1FhHgrPsh8-mpb8dIFVj60wcFiM5FFrfIQA/edit#heading=h.6si74uwp7sq8) Developers from Gmail, Google Docs/Slides/Sheet, Facebook, YouTube contributed use cases for a memory measurement API. The proposal was presented at WebPerf WG F2F June 2019 meeting with positive feedback from developers. Other signals: Ergonomics None Activation None Security The API relies on COOP and COEP for security. See https://github.com/ulan/performance-measure-memory#security-considerations This is the restriction that is supposed to be temporarily lifted. 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 Goals for experimentation Allow partners to perform A/B testing when deploying relatively heavy applications on web workers. Ongoing technical constraints - Debuggability - Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)? No (unchanged) Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ? Yes Flag name on chrome://flags Finch feature name None Non-finch justification None Requires code in //chrome? False Tracking bug Bug for OT: https://bugs.chromium.org/p/chromium/issues/detail?id=1486857 https://bugs.chromium.org/p/chromium/issues/detail?id=1049093 Launch bug https://bugs.chromium.org/p/chromium/issues/detail?id=1048745 Estimated milestones Shipping on desktop 89 OriginTrial desktop first 120 Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5685965186138112 Links to previous Intent discussions Intent to Experiment: https://groups.google.com/a/chromium.org/g/blink-dev/c/zxCKzulX424/m/bb1QR23rAQAJ This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAH%2BmL5CWW3BoKqN2%3DvxwZYAD9JzJdwCoYUwHDA8Hay_AhfqXPA%40mail.gmail.com.
