[Webkit-unassigned] [Bug 182852] New: Navigation Preload API for Service Worker

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=182852

            Bug ID: 182852
           Summary: Navigation Preload API for Service Worker
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Service Workers
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kenjibaheux at chromium.org

Navigation Preload is an important Service Worker API allowing to offset the startup cost of Service Worker by issuing a parallel request for the main resource.
Typically, we've observed 300~400ms (1 RTT) wins on mobile with key partners (I'll try to get them to chime on this bug).

Spec: https://w3c.github.io/ServiceWorker/#service-worker-registration-navigationpreload

 - Available in Chrome 59+

 - Mozilla is supportive, tracking bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1290958)
 - Edge is supportive [1]
 - I believe that Apple was also supportive [1]

[1]: https://github.com/w3c/ServiceWorker/issues/920#issuecomment-236251448

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