W3C

Web Performance Working Group

12 August 2015

Agenda

Attendees

Present
Michael, Todd, Ilya, Eli, Mark
Regrets
plh
Chair
Todd
Scribe
igrigorik

Contents


Next steps with Animation Timing spec...

ToddReifsteck: we should wait for plh@ for right steps to do a crisp handoff
... we should ask plh@ how to handoff outstanding issues

AI: we'll wait for next call with plh@ to resolve this one

requestIdleCallback to FPWD

mpb: any concerns over visited, does that need to block FPWD?

ToddReifsteck: doesn't need to block, we can publish FPWD

igrigorik: I'll check if we can publish, might need plh to flip right bits

Navigation Timing

<ToddReifsteck> https://github.com/w3c/navigation-timing/pull/32

ToddReifsteck: no objections, will merge

Frame Timing

Next item: https://github.com/w3c/frame-timing/issues/46

<ToddReifsteck> Upcoming: https://github.com/w3c/performance-timeline/issues/41

<ToddReifsteck> Upcoming: https://github.com/w3c/performance-timeline/pull/43

mpb: keeping them separate allows us to add different attributes in the future (something we discussed but don't have today.. yet)

eliperelman: the paths to both of them are very different, there might be some associated overhead..

ToddReifsteck: we can add the counter event interface in the future if we get a 3rd or 4th
... wontfix, will followup on the bug

<ToddReifsteck> Next item: https://github.com/w3c/performance-timeline/issues/41

ToddReifsteck: thinking is.. if PO has ability to report existing timeline then JS interface is much simpler (no races)
... same thing is possible via other means but we need a crisp processing model

some issues: lookback doesn't play well with our current buffer model; we should nail the processing model first

mpb, eliperelman: there is potential for missed events (e.g. exceeded buffer)

looking at Chrome, changing buffer size is very rare

mpb: a plausible v2 enhancement?

https://github.com/w3c/navigation-timing/issues/1

<ToddReifsteck> https://github.com/w3c/performance-timeline/pull/43

ToddReifsteck: we should nail down the processing model, we'll resolve current issue as possible future enhacement

any objections to going back to "new PerfObserver" approach?

ToddReifsteck: no, we should iron out the language questions and get Anne/Boris to sign off

Eli: no objection

mpb: we'll follow up on the thread

Beacon issues

<ToddReifsteck> https://github.com/w3c/beacon/issues/10

http://w3c.github.io/beacon/#sec-processing-model

<ToddReifsteck> https://github.com/w3c/beacon/issues/5

Re, #10: igrigorik to followup, current spec is already defined via Fetch

Re, #5: we'll define Beacon-Age, the similar use case for NEL is no longer relevant because NEL can deliver multiple reports in same payload

<ToddReifsteck> Preload: https://github.com/w3c/preload/pull/26

<ToddReifsteck> 8/26 for next call

Summary of Action Items

[End of minutes]

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