Bug 179377 – Implement PerformanceResourceTiming.workerStart in ServiceWorkers

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKit Misc.

[Ryosuke Niwa]

See https://www.w3.org/TR/resource-timing-2/#dom-performanceresourcetiming-workerstart

[Radar WebKit Bug Importer]

<rdar://problem/35391187>

[Ryosuke Niwa]

Also see https://github.com/w3c/resource-timing/issues/118 and https://github.com/w3c/resource-timing/issues/110

[Joseph Pecoraro]

I checked what other browsers do / if they implement PerformanceResourceTiming workerStart.

Steps:
1. Open <https://mdn.github.io/sw-test/>
2. Debug Service Worker
3. js> fetch("/sw-test/style.css")
4. js> performance.getEntries()

Chrome Canary (65.0.3311.0)
  => Has ResourceTiming entries
  => workerStart appears to always be 0

Firefox Nightly (59.0a1 (2018-01-04))
  => Does not have ResourceTiming entries

[youenn fablet]

Pull request: https://github.com/WebKit/WebKit/pull/1348

[EWS]

Committed r295518 (251523@main): <https://commits.webkit.org/251523@main>

Reviewed commits have been landed. Closing PR #1348 and removing active labels.