16:40:16 <RRSAgent> RRSAgent has joined #webperf
16:40:16 <RRSAgent> logging to http://www.w3.org/2016/06/21-webperf-irc
16:40:22 <plh> Present+ Yoav
16:40:24 <plh> Present+ Todd
16:40:26 <plh> Present+ Nic
16:40:28 <plh> Present+ Ilya
16:40:30 <plh> Present+
16:40:32 <alexchristensen> alexchristensen has joined #webperf
16:40:36 <alexchristensen> rniwa: hi
16:40:37 <plh> Present+ Colin
16:40:52 <plh> Present+ Ryosuke
16:40:57 <cflat> cflat has joined #webperf
16:40:57 <plh> Present+ Alex
16:41:10 <plh> Present+ Shubbie
16:41:21 <cflat> webex 927 374 147
16:42:13 <Zakim> Zakim has joined #webperf
16:42:43 <toddreifsteck> toddreifsteck has joined #webperf
16:42:44 <yoav> 1-877-668-4490
16:42:48 <cflat> phone: 1-877-668-4490  #927 374 147
16:42:51 <plh> Present: Yoav, Todd, Nic, Ilya, Plh, Colin, Ryosuke, Alex, Shubbie
16:43:10 <plh> Meeting: Web Performance Meeting
16:43:21 <plh> Agenda: https://github.com/w3c/web-performance/blob/gh-pages/meetings/2016/06-westcoast/agenda.md
16:43:29 <plh> Chair: Ilya&Todd
16:43:48 <smaug> hello
16:44:36 <plh> Present+ Smaug
16:46:00 <plh> [Introductions]
16:47:25 <plh> rrsagent, this meeting spans midnight
16:47:47 <igrigorik> smaug: can you hear us ok?
16:47:56 <smaug> somewhat ok-ish
16:48:33 <igrigorik> ok, we'll try to speak up
16:53:11 <igrigorik> https://docs.google.com/document/d/1DNRGhlYbMYdBkKsy7z9Bg--83KHa6r9-THurzBNLqTE/edit#
16:58:59 <smaug> hi rniwa !
16:59:30 <plh> Topic: where we're heading
16:59:40 <plh> https://docs.google.com/document/d/1bf8GTCqZCRibO-nH-KIc8GdBg--zsMLnDgVpEpooG3U/edit
17:00:17 <plh> Ilya: the architecture came through evolution
17:00:29 <plh> ... rather than thinking through from the start
17:00:57 <plh> ... (looking at Level 1 picture)
17:01:12 <plh> ... we're been trying to refactor things since
17:01:43 <plh> ... we've pushing Resource Timing L1 through CR
17:02:39 <plh> Todd: RT L1 is implemented everywhere except Safari
17:04:12 <plh> Plh: a little bit of randomness in L1, since we don't define precisely how many resources will show up and how exactly (like multiple initiators)
17:07:17 <plh> [Ilya shows L1 and L2 at the same time]
17:10:09 <alexchristensen> alexchristensen has joined #webperf
17:15:55 <plh> [side discussion on running wptserve]
17:19:54 <plh> [Ilya goes through the changes of L2*)
17:25:45 <plh> [Q3-Q4 deliverables]
17:34:16 <toddreifsteck> toddreifsteck has joined #webperf
17:46:38 <plh> plh has joined #webperf
17:47:08 <plh> rrsagent, generate minutes
17:47:08 <RRSAgent> I have made the request to generate http://www.w3.org/2016/06/21-webperf-minutes.html plh
17:47:26 <plh> rrsagent, make logs public-visible
17:48:02 <plh> Ilya: I'd like to wait until L3 before moving Resource Timing to Fetch
17:48:06 <plh> Ilya: for L2, we need to resolve globalOffset for HRT, and missing resources in RT2
17:48:08 <plh> Plh: (earlier) we'll ship all the timeline L2 together
17:48:16 <plh> Ryosuke: we'll need to identify all the things missing in Fetch first
17:48:42 <plh> Resolved: Publish a FPWD of Page Visibility 2
17:49:19 <plh> Ilya: for Beacon, let's keep as-is for L1
17:49:27 <plh> ... and do the rewriting for L2
17:49:49 <plh> Todd: I'm motivated to close some of the discussions on L2 quickly
17:56:52 <plh> Resolved: Push Beacon L1 to CR
17:57:12 <plh> rrsagent, generate minutes
17:57:12 <RRSAgent> I have made the request to generate http://www.w3.org/2016/06/21-webperf-minutes.html plh
18:06:43 <plh> [sendBeacon and RIC have significant impacts on performance]
18:06:57 <plh> s/impacts/positive impacts/
18:13:36 <smaug> There is https://www.w3.org/Bugs/Public/show_bug.cgi?id=28644 to improve the old rAF, so that work could be done right _after_ animation frame tick.
18:19:01 <rniwa> rniwa has joined #webperf
18:23:06 <plh> [Ilya shows table to summarize]
18:50:13 <Zakim> Zakim has left #webperf
18:54:19 <plh> Topic: meaningful  first paint
18:54:47 <plh> Ryosuke: let webdevs annotate their documents and tell us what's important
18:57:44 <igrigorik> https://docs.google.com/document/d/1oiy0_ych1v2ADhyG_QW7Ps4BNER2ShlJjx2zCbVzVyY/edit#heading=h.15txkfxb34vy
18:59:58 <plh> [idea is to start with first paint and first contentful paint]
19:00:37 <smaug> igrigorik: whatever doc that is, it requires one to log into Google
19:01:37 <plh> (sorting out access)
19:01:39 <yoav> https://docs.google.com/presentation/d/1AnZOscwm3kMPRkPfjS4V2VUzuNCFWh6cpK72eKCpviU/preview?slide=id.p
19:02:51 <plh> It would be nice to have a way for developers to mark what content is important; allows browsers to optimize.
19:03:21 <plh> We can have  “default” implementation + mechanism for developers to hint us: TTI might be tricky
19:03:43 <plh> Milestone 3: Nav Timing : First Paint, First contentful Paint
19:22:12 <plh> ... starting a navigation, visually complete, network quiescence
19:32:15 <plh> Delay latency between user interaction and next paint
19:40:43 <plh> [break for lunch]
20:34:24 <plh> (will start again in a few minutes)
20:39:18 <smaug> who muted the phone
20:42:41 <yoav> yoav has joined #webperf
20:45:32 <smaug> got kicked out from the conf call
20:46:05 <rniwa> rniwa has joined #webperf
20:49:03 <toddreifsteck> toddreifsteck has joined #webperf
20:49:33 <plh> smaug, did you manage to rejoin?
20:50:36 <smaug> let me retry
20:51:41 <smaug> yes
20:51:46 <smaug> but you're not online
20:52:51 <yoav> smaug: I should be now
20:54:20 <smaug> "you're the first person to join the meeting"
20:56:31 <plh> are you able to hear us now or not?
20:56:46 <plh> Topic: HRT and globalOffset
20:57:01 <smaug> I can't
20:57:06 <smaug> I'm the only one in the meeting
20:57:22 <smaug> assuming we're still using the meeting 927 374 147
20:58:07 <yoav> smaug: we're on that meeting, and I see you connected... You can't hear us?
20:59:07 <smaug> nope
20:59:13 <smaug> I heard you when you came into the room
20:59:22 <smaug> and then something happened and you got muted
20:59:23 <yoav> smaug: I see you're speaking, but can't hear you either...
20:59:40 <smaug> and then after a minute or so I got kicked out from the meeting
21:00:37 <yoav> smaug: I'll start another meeting
21:01:00 <smaug> k
21:01:41 <yoav> smaug: trying to reconnect to the same meeting first
21:02:04 <NicJansma> NicJansma has joined #webperf
21:03:00 <smaug> connected again
21:03:06 <smaug> "you're the first person to join the meeting"
21:13:53 <yoav> yoav has joined #webperf
21:33:41 <shubhie> shubhie has joined #webperf
21:34:15 <plh> [Ilya is going to write down the globalOffset proposal but it will have to be reviewed by security folks]
21:34:55 <plh> will look into cross-origin cases and UTC epoch time
21:39:13 <plh> Topic: Resource Timing
21:39:33 <plh> plh: perf obs won't give resource timing entires from the past...
21:39:53 <plh> Todd: we mentioned about caching until the load event is done...
22:15:03 <plh> https://pad.w3ctag.org/p/pt-buffer (pseudo polyfill)
22:25:04 <yoav> yoav has joined #webperf
22:26:49 <plh> for perf obs: extend filter options to filter by name and type
22:27:39 <plh> option to receive buffered entries as first invocation callback
22:28:18 <smaug> (should be totally fine to change the impl)
22:42:22 <plh> for perf obs improvements, see https://github.com/w3c/performance-timeline/issues/56
22:43:00 <plh> [discussion of adding the abliity to build the resource dependencies tree using resource-timing]
22:58:36 <plh> Yoav will keep working on the idea
22:58:48 <plh> would probably require the whole stack....
22:59:44 <plh> [discussion on having multiple initiators]
23:33:26 <plh> Topic: preconnect and push in resource timing
23:34:17 <plh> Yoav: exposing them would mean we'd get negative values (ie before requestStart)
00:07:41 <smaug> hmm, got kicked out, but it is anyhow getting late here
00:07:45 <smaug> 3:07am
00:07:58 <plh> nothing like a trailer discussion at 3am in the morning
00:08:00 <toddreifsteck> toddreifsteck has joined #webperf
00:08:23 <plh> we're pretty much done at this point
00:15:57 <plh> https://github.com/mounirlamouri/memory-pressure-api/blob/master/explainer.md