Just FYI - New Relic does a fantastic job of browser speed graphing - but
it is an expensive product.
On Fri, Jul 6, 2012 at 6:14 AM, Larry Martell <larry.mart...@gmail.com>wrote:
> On Thu, Jul 5, 2012 at 10:48 PM, Andy McKay <a...@clearwind.ca> wrote:
> >> I'm trying to use the Navigation Timing package to measure how long a
> >> page takes to be rendered.
> >
> > So you don't want to include all the lookups? Just the "rendering" part?
>
> Not sure what you mean by "lookups." I want to include everything
> between when the server sends the data, to when the page is completely
> generated (I'm using "rendered" to mean that). I'm trying to get a
> metric on the delay the user experiences.
>
> >> So that would be loadEventEnd-responseEnd,
> >> however I am finding that loadEventEnd is always 0 for me, even though
> >> I am accessing it from within a window.onload function, e.g:
> >>
> >> window.onload = function() {
> >> var t = performance.timing;
> >> var render_time = parseInt(t['loadEventEnd']) -
> parseInt(t['responseEnd']);
> >> }
> >>
> >> What do I have to wait for before loadEventEnd gets set?
> >
> > Stupid question, but when does the onload event occur, before or after
> > loadEventEnd?
>
> From looking at
>
> https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/NavigationTiming/Overview.html#processing-model
> it seems that that loadEventEnd gets set when the onload event
> completes. And from my testing it seems that window.onload fires
> before that
>
> > Running it in a console as I type this email, it gives me a non-zero
> value.
>
> Yes, in a console I see that too. But programatically, I cannot seem
> to capture loadEventEnd after it's set.
>
> How did you do it in what you describe at
> http://blog.mozilla.org/webdev/2012/01/06/timing-amo-user-experience/?
>
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