[Webkit-unassigned] [Bug 45664] Web Inspector: [Resources panel] Timing accuracy.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45664





--- Comment #3 from Pavel Feldman <pfeldman at chromium.org>  2010-09-13 09:28:31 PST ---
Investigation note:

To problems here:

1) Sync script processing is happening before we measure resource finish time (easy to fix)

2) Resource timing is measured from within WebCore dispatch events that are by definition synchronous. As a result, async network events are serialized and then measured (and hence are bogus). The way to fix it is to rely upon the network stack timers reported as a part of ResourceLoadTiming struct. Two missing pieces here:
 - resource finish time is currently not a part of load timing, need to extend it
 - not all of the WebKit platforms will be able to provide resource load timing, hence we will need to fall back to the existing behavior.

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