W3C

- DRAFT -

Web Performance Working Group Teleconference

11 Apr 2012

See also: IRC log

Attendees

Present
+1.650.253.aaaa, +1.404.978.aabb, [Microsoft], +43.732.908.2aacc, Plh, JatinderMann, Alois, plh, KarenAnderson, Arvind, Tony
Regrets
Chair
SV_MEETING_CHAIR
Scribe
JatinderMann

Contents


<trackbot> Date: 11 April 2012

<scribe> scribe: JatinderMann

Navigation Timing

plh: The good news is WebIDL is moving to CR, hopefully next week. This means we should plan to move Navigation Timing to PR.

http://www.w3.org/2012/04/navigation_timing_cr_results.html

plh: In these tests, I notice IE9 fails two tests, where as IE10 fails a test that IE9 passes. Comments Jatinder, Karen?

Karen: We discussed the two tests that IE9 failed, and we have fixed that in IE10. We will downport that fix at some point.

<plh> http://w3c-test.org/webperf/tests/approved/navigation-timing/html5/test_timing_attributes_order.html

plh: The test_timing_attributes_order.html is passing in IE10, failing IE9, Chrome and Firefox.

Karen: I wonder if the bug is in the test case, we should look into that.

plh: It looks like there was an action item on updating the test_timing_attributes_order.html that may have not been completed. http://lists.w3.org/Archives/Public/public-web-perf/2012Apr/0020.html

Karen: I will look into it.

Action Karen to look into test_timing_attributes_order.html to make sure it is correct.

<trackbot> Created ACTION-99 - Look into test_timing_attributes_order.html to make sure it is correct. [on Karen Anderson - due 2012-04-18].

<plh> http://w3c-test.org/webperf/tests/approved/navigation-timing/html5/test_timing_attributes_order.html

<plh> http://w3c-test.org/webperf/tests/approved/navigation-timing/html5/test_navigation_type_reload.html

<plh> Fail Reload loadEventEnd(0) == Original loadEventEnd(1334164524631) assert_equals: Reload loadEventEnd(0) == Original loadEventEnd(1334164524631) expected 1334164524631 but got 0

<plh> http://w3c-test.org/framework/results/nav-timing-default/

Karen: We should let Boris follow up on the test_navigation_type_reload, as Firefox is the only UA failing.

plh: We should be good to submit very soon.

Resource Timing

JatindeR: http://dvcs.w3.org/hg/webperf/raw-file/tip/specs/ResourceTiming/Overview.html#performanceresourcetiming-methods
... The spec isn't clear on what to do when onresourcetimingbufferfull isn't defined. Should we have a circular buffer or throw things that are spilled over?
... Should we update the processing model to state that if the onresourcefull callback isn't defined we just don't add the resource to the primary buffer

Action Jatinder to update Resource Timing processing model to take care of the case that onresourcetimingbufferfull isn't defined

<trackbot> Created ACTION-100 - Update Resource Timing processing model to take care of the case that onresourcetimingbufferfull isn't defined [on Jatinder Mann - due 2012-04-18].

<scribe> Topic: User Timing

Jatinder: Updates measure method without any parameters to store the duration from navigationStart to the current time, rather than fetchStart to the current time
... Updated all examples to include sub-millisecond resolution
... ○ Throws an INVALID_ACCESS_ERR exception if either startMark or endMark argument, or both, have the same name as a PerformanceTiming attribute with a "DOMHighResTimeStamp" time value of 0.
... I deleted that text.

Performance Timeline

Jatinder: To make the behavior very clear, updated Section 4.4 startTime attribute to return 0, per WG discussion last week.
... I responded to the NAvigation Timing attributes in High Resolution Time in this mailing list topic: http://lists.w3.org/Archives/Public/public-web-perf/2012Apr/0027.html

Tony: I will ask James to respond to that topic.

High Resolution Time

Jatinder: I made the following high resolution time updates: updated DOMHighResTimeStamp definition to take into account durations, updated DOMHighResTimeStamp definition to recommend microsecond resolution on millisecond units, added a note saying if sub-millisecond not possible, should return millisecond, resolution in millisecond unit, added a note saying that time spent not fully active is not excluded from current time

TPAC 2012

plh: Do we want to go TPAC this November in France?
... If I recall, other than interacting with Cameron, we didn't work too much with other groups.

Arvind: I agree that we didn't interact with other groups and the overhead might be significant.

Tony: I agree, we should maybe just meet on the west coast.

Jatinder: I think there is value in our WG face to face meeting, but I do see that the overhead is high for France and we don't usually interact with other WGs as well.

Arvind: We should probably poll the mailing list, but it feels like a no for France. I

plh: I will follow up.

<plh> https://www.w3.org/2000/09/dbwg/details?group=45211&public=1&order=org

plh: Looks like we have decided not to do the face to face in France.

<plh> Future Web Technology, Baidu, Infraware, Qihoo 360, SK Telecom, Tencent

Page Visibility

Jatinder: I have made the following updates: updated Section 4.2 to move non-normative statements into notes and capitalized, MUST and MAY statements, added prerender as an optional state, added definition of the preview state, added an editorial note for Issue 8, added hook to HTML5 unloading processing model in the Page Visibility processing model

Summary of Action Items

[End of minutes]

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Default Present: +1.650.253.aaaa, +1.404.978.aabb, [Microsoft], +43.732.908.2aacc, Plh
Present: +1.650.253.aaaa +1.404.978.aabb [Microsoft] +43.732.908.2aacc Plh JatinderMann Alois plh KarenAnderson Arvind Tony

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Found Date: 11 Apr 2012
Guessing minutes URL: http://www.w3.org/2012/04/11-webperf-minutes.html
People with action items: 

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