[minutes] 2012-10-17 Web Performance WG Teleconference #85

Meeting Summary:



1.       requestAnimationFrame Feedback

For requestAnimationFrame, we have two ongoing discussions:



-          ACTION-31: Consider including a window.animationStartTime and use High Resolution Time for the rAF callback parameter (http://www.w3.org/2010/webperf/track/actions/31)

There is a discussion on the mailing list on whether or not to standardize the window.animationStartTime property supported in IE10 (unprefixed) and Firefox (prefixed), http://lists.w3.org/Archives/Public/public-web-perf/2012Oct/0044.html.



-          ISSUE-5: Expected callback rates should be documented, http://www.w3.org/2010/webperf/track/issues/5

The specification is very clear that no callbacks should be issues when document.hidden is true. Jatinder to follow up with the CSS WG on CSS3 Animations and ensuring they also do not fire when the document.hidden is true.



2.       Test Cases Review

We have moved all three High Resolution Time test cases to the approved folder. Google is currently reviewing the Page Visibility test cases in the submission folder, http://w3c-test.org/webperf/tests/submission/Microsoft/PageVisibility/



3.       Workshop
We will have an agenda for the workshop shortly. As you are inviting attendees, please make sure to have them signup: https://www.w3.org/2002/09/wbs/1/webperf2012/




Detailed Notes:



Web Perf Teleconference #85 10/17/2012



IRC log: http://www.w3.org/2012/10/17-webperf-irc



Meeting Minutes: http://www.w3.org/2012/10/17-webperf-minutes.html



Attendees

Jatinder Mann, Philippe Le Hegaret, Tony Gentilcore, Arvind Jain, Ganesh, Alois Reitbauer


Scribe

Jatinder Mann



Contents

Agenda

1.       Review open action items

2.       Review Test Cases

3.       Discuss potential new performance ideas

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Review status of action items
https://www.w3.org/2010/webperf/track/actions/open
Jatinder: https://www.w3.org/2010/webperf/track/actions/31 - this requestAnimationFrame action has a discussion on the mailing list. Once this issue is closed, there will be no active requestAnimationFrame open items.
Test Cases
Philippe: All three HRT test cases have been moved to the approved folder.
... Regarding requestAnimationFrame callback rate when the page isn't visible, we should make sure that CSS animations also doesn't fire in order to make sure we can synchronize the two. We should follow up with the CSS animations group to make sure they agree.
Jatinder: I'll follow up with them.
Philippe: I don't want to move requestAnimationFrame forward, until we close on that discussion.
Arvind: Regarding Page Visibility test cases, we are looking into them to see if Chrome passes in them.
... What's the plan for Resource and User Timing test cases?
Tony: I have been working on some.
Jatinder: We have been working on some as well. Let's plan to have our test cases done by end of this month.
Tony: Okay.