[webkit-gtk] Implementing Navigation Timing (Web Timing) using libsoup

Zan Dobersek zandobersek at gmail.com
Tue Feb 22 02:56:16 PST 2011

As promised, work-in-progress patch is now uploaded at

On Mon, Feb 21, 2011 at 12:27 PM, Zan Dobersek <zandobersek at gmail.com>wrote:

> Hi everyone,
> over the weekend I've been looking at how the Navigation Timing
> specification[1] (previously named Web Timing) could be implemented on the
> Gtk port. Bug #42432[0] covers this problem.
> What basically needs to be done is to set specific points in the resource
> loading algorithms that are analogous to the events that are mentioned in
> the specification, more directly the PerformanceTiming interface[2].
> Attributes from navigationStart to fetchStart and from domLoading to
> loadEventEnd are already handled by document loading mechanisms (meaning
> these are working, independent of which networking backend is used).
> Attributes from domainLookupStart to responseEnd must be set to current time
> when they occur in the process of loading the resources.
> I'm asking libsoup gurus - what would be the best way to get this done?
> I was thinking of either setting these points in proper spots or perhaps
> creating a structure in libsoup, a sort of benchmarking tool that we could
> then connect to through singals and acquire from it precise timing
> information.
> I've been trying the first option out, setting the points along the
> resource loading, but it didn't feel like the information was quite accurate
> when testing on the test page[3] that was set up. Because of that feeling I
> started to think of creating a benchmarking tool in libsoup (more of an
> object that would emit signals as the events occur).
> I'll get some work-in-progress patches attached to the bug tomorrow if not
> sooner. I'd like to hear opinions/recommendations on this!
> Regards,
> Zan
> [0] https://bugs.webkit.org/show_bug.cgi?id=42432
> [1]
> http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html
> [2]
> http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html#sec-navigation-timing-interface
> [3] http://webtimingdemo.appspot.com/
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