Re: [NavigationTiming2] Comments and questions about the Navigation Timing 2 draft from Boris Zbarsky on 2012-10-11 (public-web-perf@w3.org from October 2012)

From: Boris Zbarsky <bzbarsky@MIT.EDU>
Date: Wed, 10 Oct 2012 21:14:25 -0400
To: public-web-perf@w3.org
Message-ID: <50761D71.9020501@mit.edu>

On 10/10/12 7:32 PM, Ilya Grigorik wrote:
>
>     Also, I noticed that the concept of first paint/pixel is omitted in this
>     draft.  While IE supports it with a vendor prefix, and Chrome exposes it
>     through their window.chrome.loadTimes() object (not sure if other
>     browsers
>     expose it), it would be good if it were included as part of the official
>     spec so there was a browser-independent place to gather this data.  Some
>     3rd-party testing vendors including webpagetest.org
>     <http://webpagetest.org>, report some concept
>     of the time the browser began rendering the page, and I think it
>     would be
>     valuable here too.
>
>
> +1 for exposing time to first paint in NavTiming!

Only if "first paint" is actually defined in a sane way.

-Boris

Received on Thursday, 11 October 2012 01:14:53 UTC