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Re: [WebTiming] HTMLElement timing

From: Jonas Sicking <jonas@sicking.cc>
Date: Wed, 27 Jan 2010 18:01:50 -0800
Message-ID: <63df84f1001271801r76c4901fha55ff0ddb544a564@mail.gmail.com>
To: Zhiheng Wang <zhihengw@google.com>
Cc: public-webapps@w3.org
On Wed, Jan 27, 2010 at 5:57 PM, Jonas Sicking <jonas@sicking.cc> wrote:
> On Wed, Jan 27, 2010 at 5:30 PM, Zhiheng Wang <zhihengw@google.com> wrote:
>> Hi, Jonas,
>>    Thanks for the comments. pls find comments inline.
>> On Wed, Jan 27, 2010 at 12:12 AM, Jonas Sicking <jonas@sicking.cc> wrote:
>>>
>>> On Tue, Jan 26, 2010 at 11:39 PM, Zhiheng Wang <zhihengw@google.com>
>>> wrote:
>>> > Folks,
>>> >      Thanks to the much feedback from various developers, the WebTiming
>>> > specs has undergone some
>>> > major revision. Timing info has now been extended to page elements and a
>>> > couple more interesting timing
>>> > data points are added. The draft is up
>>> > on http://dev.w3.org/2006/webapi/WebTiming/
>>> >      Feedback and comments are highly appreciated.
>>>
>>> I take it the idea is that you can get when we for an <img> element
>>> start fetching the image, when image data starts arriving etc. I'd
>>> prefer if the spec had a comprehensive list of elements that this is
>>> expected to be implemented on.
>>
>>    Right now only embedded content elements require these info. An explicit
>> list
>> might be better though, e.g., <script> is not classified as embedded
>> content.
>
> What do these properties measure on a <figure>? And why would you care
> to measure downloading performance on <link rel=icon>? And why
> wouldn't you care about <script>? That one seems more performance
> critical than any other external resource.

Sorry, my bad, it doesn't look like <link> is in this list. This still
raises the question why this is specified for <figure>, <embed> and
<canvas>, but not for <script> and <link rel=stylesheet>.

I also wonder what these properties measure on <svg>?

/ Jonas
Received on Thursday, 28 January 2010 02:02:43 GMT

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