Intent to Prototype: js-profiling in dedicated workers

[Chromestatus]

Contact emails

moni...@microsoft.com

Explainer

https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/DocumentPolicy/DocumentPolicyInWorkers.md

Specification

https://github.com/WICG/js-self-profiling/pull/88

Summary

Allows js-profiling in dedicated workers This feature enables the JavaScript Self‑Profiling (js-profiling) API in Dedicated Workers, while remaining gated by Document Policy. It allows developers to obtain low‑overhead CPU attribution for JavaScript execution in workers, with Document Policy support for workers tracked separately.

Blink component

Blink>PerformanceAPIs

Web Feature ID

profiler

Motivation

Modern web applications increasingly offload performance‑critical work to Dedicated Workers to keep the main thread responsive. While the JavaScript Self‑Profiling API provides low‑overhead CPU attribution for JavaScript execution, it is currently unavailable in workers due to its reliance on Document Policy, leaving developers without visibility into where CPU time is spent during background computation. Enabling js-profiling in Dedicated Workers fills this gap by allowing developers to capture representative JavaScript CPU profiles for worker execution, using the same explicit opt‑in and policy‑gated model already required for documents.

Initial public proposal

https://github.com/WICG/js-self-profiling/issues/33

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/issues/482085416

Estimated milestones

No milestones specified

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5159559872249856?gate=5181493867577344

This intent message was generated by Chrome Platform Status.

[Michal Mocny]

Neat!  Just a heads up that there is another active prototype in this area right now.  (And perhaps you would also be interested in helping review some of that work?)

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