Thanks everyone for another great #WPOchat Twitter chat!

This month’s #WPOChat was moderated by  Alois Reitbauer  @AloisReitbauer from http://blog.dynatrace.com

Stay tuned for next months chat topic and moderator announcement.

Here is a copy/past of the #WPOchat Twitter chat.

This archive is a simple copy/paste/ from Tweet Report’s HTML interface.

Thank you again to @AloisReitbauer for moderating and  @jonathanklein of CSNStores @utollwi of Yottaa for organizing this chat.  Organizers, Moderators, Topics and Suggestions are appreciated.  This is a community chat!

 

@sajal: #WPOchat in 20 mins… March 19, 2012, 4:39 pm

@sajal: @wpo_chat isint a #wpochat supposed to begin like 10 mins ago? cc: @AloisReitbauer March 19, 2012, 5:11 pm

@wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat @AloisReitbauermoderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 12:12 pm

@cweekly: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 12:14 pm

@AloisReitbauer: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates… March 20, 2012, 12:29 pm

@cgnwebperf: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 1:23 pm

@perfplanet: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 2:16 pm

@scottprice_geek: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 3:05 pm

@JagReehal: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 20, 2012, 3:05 pm

@dynaTrace: RT @AloisReitbauer: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join#WPOchat @AloisReitbauer moderates… March 20, 2012, 5:08 pm

@perf_testing: RT @AloisReitbauer: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat @AloisReitbauer moderates… March 20, 2012, 5:20 pm

@yottaa: RT @wpo_chat Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat @AloisReitbauermoderates http://t.co/2YQKDfaJ #WebPerf March 20, 2012, 7:22 pm

@LoadStorm: RT @yottaa: RT @wpo_chat Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/2YQKDfaJ #WebPerf March 20, 2012, 7:28 pm

@perf_testing: RT @yottaa: RT @wpo_chat Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/2YQKDfaJ #WebPerf March 20, 2012, 7:30 pm

@scottprice_geek: RT @yottaa: RT @wpo_chat Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/2YQKDfaJ #WebPerf March 20, 2012, 7:37 pm

@jonathanklein: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 21, 2012, 1:54 am

@bluesmoon: RT @wpo_chat: Rescheduled: Tomorrow (Wednesday 3/21) 1pm ET Web Performance experts join #WPOchat@AloisReitbauer moderates http://t.co/R9MYzORc #WebPerf March 21, 2012, 4:49 am

@wpo_chat: Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info: http://t.co/R9MYzORc#WebPerf #Browser #W3C March 21, 2012, 12:24 pm

@expertdan: RT @wpo_chat: Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info:http://t.co/R9MYzORc #WebPerf #Browser #W3C March 21, 2012, 12:32 pm

@yottaa: RT @wpo_chat Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info:http://t.co/2YQKDfaJ #WebDev #Browser March 21, 2012, 2:15 pm

@LoadStorm: RT @yottaa: RT @wpo_chat Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info: http://t.co/2YQKDfaJ #WebDev #Browser March 21, 2012, 2:24 pm

@scottprice_geek: RT @yottaa: RT @wpo_chat Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauermoderates More Info: http://t.co/2YQKDfaJ #WebDev #Browser March 21, 2012, 2:27 pm

@jonathanklein: RT @yottaa: RT @wpo_chat Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info: http://t.co/2YQKDfaJ #WebDev #Browser March 21, 2012, 2:57 pm

@cweekly: RT @wpo_chat: Today! 1PM ET Web Performance experts join #WPOchat @AloisReitbauer moderates More Info:http://t.co/R9MYzORc #WebPerf #Browser #W3C March 21, 2012, 4:11 pm

@wpo_chat: #WPOchat starts in 10 minutes. Remember to Tweet and tell your followers you are participating in a Twitter Chat today! #WebPerf March 21, 2012, 4:49 pm

@wpo_chat: To make chatting easier we recommend the following web client:nhttp://t.co/fc7MK9qd #WPOchat March 21, 2012, 4:51 pm

@jonathanklein: RT @wpo_chat: #WPOchat starts in 10 minutes. Remember to Tweet and tell your followers you are participating in a Twitter Chat today! #WebPerf March 21, 2012, 4:52 pm

@AloisReitbauer: #wpochat getting ready to start.n #wpochat March 21, 2012, 4:55 pm

@cweekly: Web performance twitter chat about to start: http://t.co/JaKF8tIy #webperf #pardonmyverbositythishour #wpochat March 21, 2012, 4:57 pm

@AloisReitbauer: We will talk about end user monitoring and specifically Navigation Timing and other W3C specs #wpochat March 21, 2012, 4:58 pm

@AloisReitbauer: We have some questions prepared for today #wpochat March 21, 2012, 4:59 pm

@wpo_chat: Welcome to #WPOchat! Over the next 60 minutes @AloisReitbauer will guide our conversation. #WPOchat March 21, 2012, 4:59 pm

@Catchpoint: Join #wpochat live at at http://t.co/4YHisr32 talk about Real User Monitoring and the W3C specs March 21, 2012, 5:00 pm

@wpo_chat: Today’s Moderator is Alois Reitbauer @AloisReitbauer http://t.co/Hd8NdrMW #wpochatn #WPOchat March 21, 2012, 5:00 pm

@wpo_chat: Let’s take a few minutes – please introduce yourself – what you do, what industry you are in etc.n #WPOchat March 21, 2012, 5:00 pm

@AloisReitbauer: Question A: Is Navigation Timing ready for use in production monitoring. Some people (incl. me) had issues specifically in Firefox #wpochat March 21, 2012, 5:00 pm

@wpo_chat: Remember Topics and Moderators are needed for the next chat! Leave a comment on http://t.co/cDXlL7ny Question 1 coming up. #WPOchat March 21, 2012, 5:01 pm

@dritans: Is there a predefined list of questions for today’s chat? #wpochat March 21, 2012, 5:01 pm

@jonathanklein: Jonathan Klein here – joining #WPOChat from Wayfair in Boston March 21, 2012, 5:01 pm

@AloisReitbauer: Yes there is. See http://t.co/51lGp5rNn #wpochat March 21, 2012, 5:02 pm

@jonathanklein: @dritans yes, @AloisReitbauer will be tweeting them #wpochat March 21, 2012, 5:02 pm

@dritans: Drit product manager with @catchpoint in NYC #wpochat March 21, 2012, 5:02 pm

@AloisReitbauer: Will also tweet them heren #wpochat March 21, 2012, 5:02 pm

@cweekly: Hi folks, Chris Weekly here (wearing various hats for Yottaa in Boston)n #wpochat March 21, 2012, 5:03 pm

@AloisReitbauer: Question A: Is Navigation Timing ready for use in production monitoring. #wpochat March 21, 2012, 5:03 pm

@jonathanklein: #wpochat A1: We use it in production, but take the data with a grain of salt (and ignore older versions of Firefox) March 21, 2012, 5:03 pm

@AloisReitbauer: Question B: Which problems are you solving with real user monitoring? #wpochat March 21, 2012, 5:03 pm

@AloisReitbauer: What about the lack of support in Safari. Doesn’t that hurt you guys?n #wpochat March 21, 2012, 5:04 pm

@AloisReitbauer: Q3: What does your real user monitoring portfolio look like (Nav. Timing, Synthetic Monitoring, Network Sniffing)?#wpochat March 21, 2012, 5:04 pm

@dritans: A1 the data has been a little iffy. Even in the browsers that support it sometime the numbers make no sense. #wpochat March 21, 2012, 5:04 pm

@jonathanklein: @AloisReitbauer yeah the data isn’t complete, but it’s another data point #wpochat March 21, 2012, 5:04 pm

@log_normal: hey, philip here from Log-Normal, Buddy’s here too #wpochat March 21, 2012, 5:05 pm

@jonathanklein: RT @AloisReitbauer Q2: Which problems are you solving with real user monitoring? #wpochat March 21, 2012, 5:05 pm

@AloisReitbauer: A1: Did you know that there is a test suite of W3C. Maybe worth reporting problems to the WG #wpochat March 21, 2012, 5:05 pm

@log_normal: we use the NavTiming API, but we have a few fallbacks for where it’s not supported, (Safari, IE <= 8, Opera, iOS, Android) #wpochat March 21, 2012, 5:06 pm

@jonathanklein: #wpochat A2: I think RUM is the best way to correlate performance and engagement (bounce rate, conversion rate, etc.) March 21, 2012, 5:06 pm

@dritans: Can we slow down a little with the questions. I think there is like 4-5 open ones as of right now. #wpochat March 21, 2012, 5:07 pm

@jonathanklein: @dritans I am using http://t.co/CXb3yx3A #wpochat March 21, 2012, 5:07 pm

@log_normal: Answer A2: we’ve also solved the Firefox problem by using alternate start times #wpochat March 21, 2012, 5:07 pm

@jonathanklein: @dritans yeah that was a mistake, should be on question 2 at the moment. Question 3 will be retweeted in a few minutes #wpochat March 21, 2012, 5:08 pm

@AloisReitbauer: A1: Do you think the problems are for specific sites or the implementation is instable? #wpochat March 21, 2012, 5:08 pm

@dritans: RT @jonathanklein: #wpochat A2: I think RUM is the best way to correlate performance and engagement (bounce rate, conversion rate, etc.) March 21, 2012, 5:08 pm

@Catchpoint: RT @jonathanklein: #wpochat A2: I think RUM is the best way to correlate performance and engagement (bounce rate, conversion rate, etc.) March 21, 2012, 5:08 pm

@AloisReitbauer: @dritans We already slowed down a bit #wpochat March 21, 2012, 5:09 pm

@sajal: A3: nav timing. Always facinated with network sniffing, but never implemented it #wpochat March 21, 2012, 5:09 pm

@jonathanklein: @scottprice_geek you should join #wpochat - going on now! Info here: http://t.co/AnSsQ1kL March 21, 2012, 5:09 pm

@jonathanklein: @dritans Got it, yeah in the past we have, this time Alois just picked the questions. We might go back to group ones in next chat #wpochat March 21, 2012, 5:10 pm

@AloisReitbauer: A1: @log_normal do you feel that the values get better with newer browsers? #wpochat March 21, 2012, 5:11 pm

@wpo_chat: Q3: What does your real user monitoring portfolio look like (Nav. Timing, Synthetic Monitoring, Network Sniffing)?#WPOchat March 21, 2012, 5:11 pm

@cweekly: A1 Yes, “ready” w/ caveats about its fragility (i.e. take care to account for FF bug etc). GA has been using it for a long time… #wpochat March 21, 2012, 5:11 pm

@log_normal: @AloisReitbauer other than the one big firefox bug, we haven’t seen any other issues, but we’re also not dependent on navtiming #wpochat March 21, 2012, 5:12 pm

@cweekly: @log_normal have you documented your “alt start times” approach for FF? #wpochat March 21, 2012, 5:12 pm

@log_normal: We’ve been using NavTiming in boomerang since the day IE9 added it #wpochat March 21, 2012, 5:13 pm

@jonathanklein: #wpochat A3 We use Boomerang (via @log_normal) and a network tap for server side RUM March 21, 2012, 5:13 pm

@log_normal: @cweekly it’s in our boomerang repo on github #wpochat March 21, 2012, 5:13 pm

@cweekly: @log_normal cool, tx #wpochat March 21, 2012, 5:14 pm

@jonathanklein: #wpochat A3 We also have synthetic monitoring through @Catchpoint March 21, 2012, 5:14 pm

@AloisReitbauer: Q3: What does your real user monitoring portfolio look like #wpochat March 21, 2012, 5:14 pm

@AloisReitbauer: I think boomerang is a great source of wisdom here n #wpochat March 21, 2012, 5:15 pm

@AloisReitbauer: A3: Where do you see the cut btw. synthetic and RUM? #wpochat March 21, 2012, 5:15 pm

@bluesmoon: RT @AloisReitbauer: I think boomerang is a great source of wisdom here n #wpochat March 21, 2012, 5:16 pm

@AloisReitbauer: A1: I wonder how widely Nav Timing is used today. We are using it as well. Specially like the support in new mobile browsers #wpochat March 21, 2012, 5:16 pm

@jonathanklein: #wpochat A3: We like having both synthetic and RUM – the former for availability/change tracking and the latter for engagement and outliers March 21, 2012, 5:16 pm

@AloisReitbauer: A3: There were some discussion on synthetic to die b/c of RUM. What’s your take on this? #wpochat March 21, 2012, 5:17 pm

@andydavies: @AloisReitbauer I see synthetic as being about how your servers are performing and RUM about the users experience #wpochat #wpochat March 21, 2012, 5:18 pm

@AloisReitbauer: @bluesmoon you will be talking about Q3 at Velocity – right?n #wpochat March 21, 2012, 5:18 pm

@log_normal: Synthetic monitoring is great to analyze object level metrics and break down requests by different network components #wpochat March 21, 2012, 5:18 pm

@sajal: @AloisReitbauer synthetic will never die, there is always a need for it . esp for debugging. #wpochat March 21, 2012, 5:18 pm

@jonathanklein: @AloisReitbauer RUM is a little too noisy to use on its own. Good response to Pat’s post here: http://t.co/Q56KEDiZ#wpochat March 21, 2012, 5:19 pm

@AloisReitbauer: @andydavies so you do not need browser driven synthetics?n #wpochat March 21, 2012, 5:19 pm

@bluesmoon: @AloisReitbauer yes, will be doing a talk with @bbrewer and Carlos Bueno from Facebook. #wpochat March 21, 2012, 5:20 pm

@mrPerezMarc: has any one used new relic to monitor users speed experience?n #wpochat March 21, 2012, 5:20 pm

@AloisReitbauer: @jonathanklein Agree, also RUM can never provide availability #wpochat March 21, 2012, 5:21 pm

@bluesmoon: FYI Carlos is @archivd on twitter #wpochat March 21, 2012, 5:21 pm

@cweekly: A3 I see them as complementary. On-demand tests and scheduled monitoring and benchmarking… real browsers + control FTW #wpochat March 21, 2012, 5:21 pm

@sajal: @mrPerezMarc i find end user report on new relic to be too noisy. Its awesome for app performance #wpochat March 21, 2012, 5:22 pm

@bluesmoon: @AloisReitbauer not entirely true, it’s tricky, but you can tell downtime by a significant drop in beacons (we did that at yahoo) #wpochat March 21, 2012, 5:22 pm

@andydavies: @AloisReitbauer The synthetic tools I use at the moment (SiteConfidence, private WPT) are browser based.#wpochat March 21, 2012, 5:22 pm

@cweekly: RT @jonathanklein: @AloisReitbauer RUM too noisy to use on its own. Good response to Pats post here:http://t.co/LuLEDHGK #wpochat March 21, 2012, 5:22 pm

@AloisReitbauer: A3: I also see every big performance vendor today having both – synthetic and RUM #wpochat March 21, 2012, 5:22 pm

@rockstarapps: @mrPerezMarc - we use rewrelic for server monitoring and i find our ops guys gravitate to the RUM graphs. they’re nicely integrated #wpochat March 21, 2012, 5:22 pm

@AloisReitbauer: @bluesmoon good point! #wpochat March 21, 2012, 5:23 pm

@AloisReitbauer: Q4: Do we need more. If yes – which additional information do we need?. Are you happy with Resource Timing + User Timing? #wpochat March 21, 2012, 5:23 pm

@AloisReitbauer: @bluesmoon yahoo uses boomerang in production? #wpochat March 21, 2012, 5:24 pm

@mrPerezMarc: @saja what do you mean by to noisy?n #wpochat March 21, 2012, 5:24 pm

@jonathanklein: A4: I think resource timing will be great once it is widely supported – we need more granular timings in the browser#wpochat March 21, 2012, 5:24 pm

@mrPerezMarc: What is this boomerang everyone is mentioning? #wpochat March 21, 2012, 5:24 pm

@wpo_chat: Q4: Do we need more. If yes – which additional information do we need?. Are you happy with Resource Timing + User Timing? #WPOchat March 21, 2012, 5:24 pm

@bluesmoon: @AloisReitbauer yahoo has been using it since 2006 #wpochat March 21, 2012, 5:24 pm

@sajal: @mrPerezMarc http://t.co/cY4IrU1K #wpochat March 21, 2012, 5:25 pm

@jonathanklein: A4: I also want really robust application level tracing for PHP *cough* dynatrace *cough* #wpochat March 21, 2012, 5:25 pm

@andydavies: @jonathanklein One of the biggest problems I have with current RUM tools is the way the data is rolled up – hard to ask “what if” #wpochat March 21, 2012, 5:25 pm

@cweekly: Resource timing will be very useful http://t.co/D5g5Tjmj #wpochat March 21, 2012, 5:25 pm

@sajal: @mrPerezMarc I mean it doesnt give any indication of time to interact. Ad networks, widgets, etc push onload longer.#wpochat March 21, 2012, 5:26 pm

@mrPerezMarc: A4 i think we need a general feel for how fast user loads pagesn #wpochat March 21, 2012, 5:26 pm

@AloisReitbauer: @jonathanklein :-) #wpochat March 21, 2012, 5:26 pm

@andydavies: @jonathanklein Using Oracle RUEI was able to distill the huge amounts of data down to meaningful stuff #wpochat March 21, 2012, 5:26 pm

@mrPerezMarc: A4: i found on CNN and other sites that they mesure bandwith and deliver content based on that speedn #wpochat March 21, 2012, 5:26 pm

@AloisReitbauer: What do you think about the adoption of the CORS header by Third Parties?n #wpochat March 21, 2012, 5:27 pm

@dritans: Has any of the browsers has resource timing in their roadmap? #wpochat March 21, 2012, 5:27 pm

@AloisReitbauer: @mrPerezMarc What should this metric look like? Isn’t that always depending on the page? #wpochat March 21, 2012, 5:27 pm

@sajal: RT @dritans: Has any of the browsers has resource timing in their roadmap? #wpochat March 21, 2012, 5:27 pm

@andydavies: A4 Happyish with Resource Timing there are some limitations I don’t like but understand why they are there…#wpochat March 21, 2012, 5:27 pm

@AloisReitbauer: @mrPerezMarc interesting #wpochat March 21, 2012, 5:28 pm

@cweekly: RT @AloisReitbauer: What do you think about the adoption of the CORS header by Third Parties? Is this Q5? #wpochat March 21, 2012, 5:28 pm

@andydavies: @AloisReitbauer I we’re going to have to educate third parties on the CORS stuff #wpochat March 21, 2012, 5:28 pm

@AloisReitbauer: @andydavies most of them are security/privacy relatedn #wpochat March 21, 2012, 5:28 pm

@AloisReitbauer: @cweekly Part of Q4 and Resource Timing. As this would help to understand Third Parties better. #wpochat March 21, 2012, 5:29 pm

@bluesmoon: @mrPerezMarc you can use boomerang to measure bandwidth. #wpochat March 21, 2012, 5:29 pm

@sajal: How long would it take for resource timing to get to the point where nav timing is? wrt browser implementation.. 2 yrs?#wpochat March 21, 2012, 5:30 pm

@AloisReitbauer: I mean we already get third party data today. @bluesmoon does bommerang time resources as well #wpochat March 21, 2012, 5:30 pm

@andydavies: @AloisReitbauer Yeh went and read @tonygentilcore’s post to the security list asking questions about it. #wpochat March 21, 2012, 5:30 pm

@mrPerezMarc: I think with all tips and tricks from @souders books, a great deal of speed modification we’ve applied proved fruitful#wpochat March 21, 2012, 5:31 pm

@dritans: 3rd party providers like adserving are already doing osmething similar to CORS for flash and they do have the capabilities to do it #wpochat March 21, 2012, 5:31 pm

@cweekly: @sajal I think less (vendors are rolling out new versions waay faster than they used to) #wpochat March 21, 2012, 5:31 pm

@AloisReitbauer: @sajal I think Microsoft is pretty far. #wpochat March 21, 2012, 5:31 pm

@bluesmoon: @AloisReitbauer kinda. boomerang lets you add timers to any part of your page #wpochat March 21, 2012, 5:31 pm

@AloisReitbauer: Chrome will one of the early adopters as well I think #wpochat March 21, 2012, 5:31 pm

@jonathanklein: @sajal I think Chrome and Firefox will be there much more quickly with the fast release cycle. IE…maybe in IE11?#wpochat March 21, 2012, 5:31 pm

@mrPerezMarc: @cweekly, that’s the way it should be, to many people are patching up jobs and releasing site that are under constant change #wpochat March 21, 2012, 5:32 pm

@jonathanklein: @ie any plans to support the resource timing spec in future browser versions? #wpochat March 21, 2012, 5:33 pm

@mrPerezMarc: @sajal, could be quicker if we all submitted our ideas to w3cn #wpochat March 21, 2012, 5:33 pm

@log_normal: @wpo_chat the tough part with RUM is to be able to measure and report numbers without affecting load time#wpochat March 21, 2012, 5:33 pm

@AloisReitbauer: Resouce Timing Adoption – Maybe a question for this years browser panel at Velocity //cc @souders #wpochat March 21, 2012, 5:33 pm

@andydavies: @jonathanklein MS are in the relevant W3C working group #wpochat March 21, 2012, 5:34 pm

@dritans: RT @log_normal: @wpo_chat the tough part with RUM is to be able to measure and report numbers without affecting load time #wpochat March 21, 2012, 5:34 pm

@mrPerezMarc: i find that the w3c gets a lot of collaboration from the industry #wpochat March 21, 2012, 5:34 pm

@sajal: RT @AloisReitbauer: Resouce Timing Adoption – Maybe a question for this years browser panel at Velocity //cc @souders#wpochat March 21, 2012, 5:34 pm

@AloisReitbauer: However browser vendors have a lot to do with the whole HTML5 thinkg  #wpochat March 21, 2012, 5:34 pm

@andydavies: @log_normal That’s sort of where network taps help but obviously they don’t measure the browser experiencen#wpochat March 21, 2012, 5:34 pm

@AloisReitbauer: All browser vendors are in except Apple #wpochat March 21, 2012, 5:35 pm

@mrPerezMarc: why would they need to adot this, there are nifty Js code that does all this fir us #wpochat March 21, 2012, 5:35 pm

@jonathanklein: RT @AloisReitbauer: Resouce Timing Adoption – Maybe a question for this years browser panel at Velocity //cc@souders #wpochat March 21, 2012, 5:36 pm

@dritans: IE10 does not mention Resource Timing – so best case IE11 http://t.co/nQwfF1lJ #wpochat March 21, 2012, 5:36 pm

@AloisReitbauer: Q5: What do you think about User Timing? Is manual code instrumentation the right way? #wpochat March 21, 2012, 5:37 pm

@jonathanklein: @mrPerezMarc yeah but the JS has overhead and is less accurate – getting it directly from the browser is best#wpochat March 21, 2012, 5:37 pm

@AloisReitbauer: A4: I think noise and meaning is a general problem in the monitoring space #wpochat March 21, 2012, 5:37 pm

@andydavies: @AloisReitbauer First RUM tool I used was network tap based, you can still get a large amount of useful performance data out #wpochat March 21, 2012, 5:38 pm

@cweekly: RT @andydavies: Mobile is where we really need resource timing api to be supported // TRUE #wpochat March 21, 2012, 5:38 pm

@AloisReitbauer: @andydavies agree. We today managed to get Resource Timings on mobile. Custom built for sure  #wpochat March 21, 2012, 5:38 pm

@mrPerezMarc: @jonathanklein A few millisecond of inaccuracy wont hurt, u will always have a margin of error #wpochat March 21, 2012, 5:39 pm

@log_normal: @wpo_chat we sort of solve the noise problem by having a very large sample set (100K+) and looking at percentiles instead of amean #wpochat March 21, 2012, 5:39 pm

@dritans: @andydavies afraid pple will misuse it on mobile,start posting large amnt of data for the sake of tracking #webperf making it worst #wpochat March 21, 2012, 5:39 pm

@wpo_chat: Q5: What do you think about User Timing? Is manual code instrumentation the right way? #WPOchat March 21, 2012, 5:39 pm

@andydavies: @AloisReitbauer Hurrah! #wpochat March 21, 2012, 5:39 pm

@log_normal: @mrPerezMarc that’s why we report margin of error with our numbers  #wpochat March 21, 2012, 5:39 pm

@jonathanklein: RT @andydavies: Mobile is where we really need resource timing api to be supported #wpochat March 21, 2012, 5:40 pm

@mrPerezMarc: @dritans tracking should be on a small scale to get a glimpse of where ythere is room from improvementn#wpochat March 21, 2012, 5:40 pm

@jonathanklein: A5: I’d much rather have the data in the browser – easier to implement, more accurate, and less overhead. Every ms counts. #wpochat March 21, 2012, 5:40 pm

@AloisReitbauer: We for example send back only hotspot data. Sending beacons for every resource on mobile would kill you#wpochat March 21, 2012, 5:41 pm

@dritans: @mrPerezMarc totally agree, thats why our RUM solution is called Glimpse. #wpochat March 21, 2012, 5:42 pm

@AloisReitbauer: @jonathanklein did you ever use a lib like User Timing? I know some people who built similar stuff. It is not really rocket science #wpochat March 21, 2012, 5:42 pm

@andydavies: @mrPerezMarc But how do you know who to sample? Been thinking about a beacon for Resource Timing that you can have predicates on #wpochat March 21, 2012, 5:42 pm

@AloisReitbauer: Q6: What do you think the next standard should deal with? What are we still lacking? #wpochat March 21, 2012, 5:43 pm

@cweekly: RT @AloisReitbauer: … Sending beacons for every resource on mobile would kill you // Yeah, observer effect 4 mobile cld b massiv #wpochat March 21, 2012, 5:43 pm

@jonathanklein: @AloisReitbauer haven’t tried it, I’m sure it’s not hard but once the data is in the browser people do a lot of great stuff with it #wpochat March 21, 2012, 5:44 pm

@mrPerezMarc: @andydavies you sample who your target is, if you have clients from the us, then you sample them, or create buckets #wpochat March 21, 2012, 5:44 pm

@dritans: Q6 performance of JS code. Often is not the network wire time – but badly written code that impacts end users. #wpochat March 21, 2012, 5:44 pm

@AloisReitbauer: @holydevil @lognormal in RUM I feel averages have very little value. I always work with percentiles #wpochat March 21, 2012, 5:44 pm

@mrPerezMarc: A6: everything & everything #wpochat March 21, 2012, 5:44 pm

@AloisReitbauer: @jonathanklein. It’s not data. It is just an API  #wpochat March 21, 2012, 5:45 pm

@jonathanklein: A6: That’s a tough one…perhaps a better way to sandbox third parties? Better native ways to async JS that has no dependencies? #wpochat March 21, 2012, 5:45 pm

@AloisReitbauer: @dritans That’s what User Timing should do … #wpochat March 21, 2012, 5:45 pm

@AloisReitbauer: @mrPerezMarc everything is bit unspecific  #wpochat March 21, 2012, 5:45 pm

@mrPerezMarc: @dritans Js will always be a problem bcause everyone does it differently. have you ever used JsLink?n #wpochat March 21, 2012, 5:46 pm

@jonathanklein: @AloisReitbauer haha, fine. Maybe I’m just lazy (busy?) #wpochat March 21, 2012, 5:46 pm

@AloisReitbauer: @jonathanklein. I think the performance sandboxing is a great idea. You should post that to the WG #wpochat March 21, 2012, 5:46 pm

@andydavies: Q6 – media queries for more things e.g. SVG, better way of determining the browser characteristics on the server#wpochat March 21, 2012, 5:46 pm

@dritans: @AloisReitbauer RUM or not, when measuring web performance averages will lie. Too many factors intertwined #wpochat March 21, 2012, 5:46 pm

@wpo_chat: Q6: What do you think the next standard should deal with? What are we still lacking? #WPOchat March 21, 2012, 5:47 pm

@cweekly: @jonathanklein @AloisReitbauer … also User Timing has better precision (so it’s not just a convenience for implementation) #wpochat March 21, 2012, 5:47 pm

@AloisReitbauer: Q7: Which timings to you look at? Is onLoad still relevant. What timings do you track? #wpochat March 21, 2012, 5:47 pm

@bluesmoon: @wpo_chat I’d really like to see measurements for rendering time, CSS, layout, etc. #wpochat March 21, 2012, 5:47 pm

@mrPerezMarc: @AloisReitbauer Ok fine… including the kitchen sink. the big problem i find is that their are great ressources on how to speed #wpochat March 21, 2012, 5:47 pm

@mrPerezMarc: @AloisReitbauer speed up sites, but 90% of ppl dont do it. #wpochat March 21, 2012, 5:48 pm

@AloisReitbauer: @cweekly agreed. Just as performance.now() will have #wpochat March 21, 2012, 5:48 pm

@jonathanklein: @dritans @AloisReitbauer yeah but those people at the 95th percentile make your site look SLOW </sarcasm>#wpochat March 21, 2012, 5:48 pm

@wpo_chat: RT @AloisReitbauer: Q7: Which timings to you look at? Is onLoad still relevant. What timings do you track? #WPOchat March 21, 2012, 5:48 pm

@andydavies: Sorry got to jump out will read back through the thread later #wpochat March 21, 2012, 5:48 pm

@jonathanklein: RT @bluesmoon: @wpo_chat I’d really like to see measurements for rendering time, CSS, layout, etc. #wpochat March 21, 2012, 5:48 pm

@mrPerezMarc: @AloisReitbauer A7, mainly everything before onLoad, because until then, most users can’t do anything, and post is all extra stuff #wpochat March 21, 2012, 5:49 pm

@AloisReitbauer: @bluesmoon good point. How deep should that go. We are still in prod monitoring here …. #wpochat March 21, 2012, 5:49 pm

@dritans: Q6 Onload is still relevant for most sites. On newer sites relying on AJAX/HTML5 it can be useless #wpochat March 21, 2012, 5:49 pm

@jonathanklein: A7: TTFB is always a good one, onLoad still matters but you can game it. #wpochat March 21, 2012, 5:50 pm

@cweekly: @dritans ”Often is not the network wire time – but badly written code…” // This is the 90/10 lesson of WPO all over again  #wpochat March 21, 2012, 5:50 pm

@bluesmoon: RT @jonathanklein: @dritans @AloisReitbauer yeah but those people at the 95th percentile make your site look SLOW </sarcasm> #wpochat March 21, 2012, 5:51 pm

@AloisReitbauer: What about above the fold? #wpochat March 21, 2012, 5:52 pm

@AloisReitbauer: RT @bluesmoon: yeah but those people at the 95th percentile make your site look SLOW </sarcasm> #wpochat March 21, 2012, 5:53 pm

@bluesmoon: @jonathanklein if you’re gaming your own performance numbers, then performance is not your problem  #wpochat March 21, 2012, 5:53 pm

@dritans: @jonathanklein the question abt 95% is are they there because of crappy router, downloading lots of torrents,or ur site hated them #wpochat March 21, 2012, 5:53 pm

@jonathanklein: @AloisReitbauer Yeah could be nice, but hard to measure and fold is different for all. When the browser provides it natively…  #wpochat March 21, 2012, 5:53 pm

@AloisReitbauer: @cweekly If it is the code, then we need better devs  #wpochat March 21, 2012, 5:54 pm

@dritans: RT @bluesmoon: if youre gaming your own performance numbers, then performance is not your problem  #wpochat March 21, 2012, 5:54 pm

@holydevil: @aloisreitbauer onLoad – yes. To be precise, it’s ‘time to interact’ that’s important. There’s no standard way to measure this. #wpochat March 21, 2012, 5:54 pm

@AloisReitbauer: Q8: What do you think about the missing ability to measure bandwitdh? #wpochat March 21, 2012, 5:54 pm

@bluesmoon: @AloisReitbauer boomerang already has bandwidth measurement  #wpochat March 21, 2012, 5:55 pm

@wpo_chat: RT @AloisReitbauer: Q8: What do you think about the missing ability to measure bandwitdh? #WPOchat March 21, 2012, 5:55 pm

@jonathanklein: A8: Well it’s not missing in Boomerang, but a native way is. It’s hard to do without making people download a series of files #wpochat March 21, 2012, 5:56 pm

@AloisReitbauer: @bluesmoon by downloading images – right? #wpochat March 21, 2012, 5:56 pm

@jonathanklein: RT @AloisReitbauer: Q8: What do you think about the missing ability to measure bandwitdh? #wpochat March 21, 2012, 5:56 pm

@dritans: A8. Not sure if we need bandwidth, or something else. We need an indicator if the user is having network issues across the board. #wpochat March 21, 2012, 5:56 pm

@AloisReitbauer: Shouldn’t browsers just provide this info. They have it. #wpochat March 21, 2012, 5:56 pm

@bluesmoon: @AloisReitbauer @jonathanklein yeah, hence the <wink> #wpochat March 21, 2012, 5:56 pm

@jonathanklein: A8: So I doubt browsers will add that functionality #wpochat March 21, 2012, 5:57 pm

@bluesmoon: @AloisReitbauer so you can already get mobile connection type from Android devices #wpochat March 21, 2012, 5:57 pm

@AloisReitbauer: I hate to do that image thing on mobile. Especially in Europe with all the costly roaming plans  #wpochat March 21, 2012, 5:57 pm

@jonathanklein: @AloisReitbauer Do the browsers have it? How? They can estimate it…but it’s not super precise if resources are small #wpochat March 21, 2012, 5:57 pm

@AloisReitbauer: You can kind of estimate it with Nav Timing as well #wpochat March 21, 2012, 5:58 pm

@log_normal: We also record information from the Network Information API: http://t.co/De7FzKOc #wpochat March 21, 2012, 5:58 pm

@dritans: At home my connection could say cable, but at 9PM its the equivalent of a modem. What consumers purchase is not what they get. #wpochat March 21, 2012, 5:58 pm

@mrPerezMarc: @dritans what if an issue with 1-5% of ur visitors, should u spend that much time effort money 2 make sure they are well servered?n #wpochat March 21, 2012, 5:59 pm

@AloisReitbauer: @bluesmoon agreed. Unfortunately that does not tell us what it really is. I now some 3G connections that are faster than WiFi  #wpochat March 21, 2012, 5:59 pm

@AloisReitbauer: @log_normal good point! #wpochat March 21, 2012, 6:00 pm

@bluesmoon: You can also buy a bandwidth database from MaxMind or Quova to tell (sort of) Bandwidth based on IP #wpochat March 21, 2012, 6:00 pm

@dritans: @mrPerezMarc depends on who that 5% is, what if it is the one that bring 80% of your revenue? #wpochat March 21, 2012, 6:01 pm

@AloisReitbauer: @mrPerezMarc What if they buy your stuff? Isn’t this why we all do it? #wpochat March 21, 2012, 6:01 pm

@jonathanklein: @bluesmoon Is that based on purchased bandwidth or actual bandwidth? #wpochat March 21, 2012, 6:01 pm

@cweekly: @dritans … right — to say nothing of mobile users. “bandwidth” is increasingly dynamic… #wpochat March 21, 2012, 6:01 pm

@mrPerezMarc: @AloisReitbauer if the 5% are the ones buying my stuff, then their really isn’t a problem with my site is there?#wpochat March 21, 2012, 6:02 pm

@dritans: FCC study clearly shows there is problems with consumer networks. They do degrade way below what is promisedhttp://t.co/LDSiJxdV #wpochat March 21, 2012, 6:02 pm

@bluesmoon: @jonathanklein it’s based on advertised bandwidth, which may not even be the same as purchased bandwidth#wpochat March 21, 2012, 6:02 pm

@wpo_chat: You are welcome to keep chatting as we come to a close. Great conversation going here with the #WebPerf community. #WPOchat March 21, 2012, 6:02 pm

@mrPerezMarc: @dritans then for them, they accept my site the way it is and gladly spend their money #wpochat March 21, 2012, 6:02 pm

@wpo_chat: Did you enjoy this chat? Do you have any suggestions? #wpochatn #WPOchat March 21, 2012, 6:02 pm

@cweekly: I’ve gotta bail. Great chat guys, see you all next time! n #wpochat March 21, 2012, 6:02 pm

@wpo_chat: Remember – Topics, Moderators, Guests, Wanted – If that’s you leave a comment on http://t.co/cDXlL7ny #WPOchat March 21, 2012, 6:03 pm

@AloisReitbauer: In Europe they now slow you down when over your data limit. Also a point #wpochat March 21, 2012, 6:03 pm

@mrPerezMarc: @AloisReitbauer @dritans users have multiple devices, pc, ipads, phones, so if the site is fast enough on one they know it’s them #wpochat March 21, 2012, 6:03 pm

@log_normal: @wpo_chat BTW, 54% of you who visited our site today have a network speed between 2-6Mbps #wpochat March 21, 2012, 6:03 pm

@rockstarapps: #bandwidth is important but you can always measure known bandwidth performance… then simulate the rest.#wpochat March 21, 2012, 6:04 pm

@wpo_chat: Thank You - @AloisReitbauer and the #webperf community. A great chat! Look for an archive soon athttp://t.co/cDXlL7ny #WPOchat March 21, 2012, 6:04 pm

@sajal: RT @log_normal: @wpo_chat BTW, 54% of you who visited our site today have a network speed between 2-6Mbps#wpochat March 21, 2012, 6:04 pm

@bluesmoon: Thanks @AloisReitbauer for moderating #wpochat today. March 21, 2012, 6:04 pm

@jonathanklein: RT @bluesmoon: Thanks @AloisReitbauer for moderating #wpochat today. March 21, 2012, 6:05 pm

@mrPerezMarc: @log_normal ha! i didn’t think my 3G iphone 4s was that fast ) #wpochat March 21, 2012, 6:05 pm

@cweekly: RT @bluesmoon: Thanks @AloisReitbauer for moderating #wpochat today. #wpochat March 21, 2012, 6:05 pm

@AloisReitbauer: Thanks everyone for joining! #wpochat March 21, 2012, 6:05 pm

@holydevil: @AloisReitbauer That’s true for most providers in India too. Once you hit the FUP limit, your speed drops. #wpochat March 21, 2012, 6:05 pm

@mrPerezMarc: Thank you everyone! This was, as always is a great discussion! #wpochat March 21, 2012, 6:06 pm

@AloisReitbauer: Anything left open?  #wpochat March 21, 2012, 6:06 pm

@AloisReitbauer: Good #wpochat today about real user monitoring and Nav Timing #webperf #wpochat March 21, 2012, 6:09 pm

@mrPerezMarc: where can i catch up on what i missed earlier?n #wpochat March 21, 2012, 6:10 pm

@stubbornella: RT @jonathanklein: @dritans @AloisReitbauer yeah but those people at the 95th percentile make your site look SLOW </sarcasm> #wpochat March 21, 2012, 6:12 pm

@AloisReitbauer: It will be posted on the wpochat pagen #wpochat March 21, 2012, 6:14 pm

Thanks everyone for another great #WPOchat Twitter chat!

This month’s moderators were Bryan McQuade and Joshua Marantz of Google’s Page Speed team.  They selected questions from the community and mixed in some of their own to create a dynamic and interesting chat.

Stay tuned for next months chat topic and moderator announcement.  This next chat is scheduled for Monday August 29th at 3pm ET or 8pm London.

Here is a copy/past of the #WPOchat Twitter chat.

(If you would like one removed from this list in this archive below  – please email:wpochat.twitter@gmail.com (we can’t remove Tweets from Twitter) This archive was a simple copy/paste/ from Tweet Report’s HTML interface.   An RSS feed is available from Twitter for the #WPOchat search : http://search.twitter.com/search.atom?q=WPOchat

Thank you again to @jonathanklein of CSNStores and @utollwi of Yottaa for organizing this chat.  Organizers, Moderators, Topics and Suggestions are appreciated.  This is a community chat!

NOTE: This archive is displayed here – last Tweet first.  Please start reading the archived Tweets at the bottom of this post.

yottaa @jmarantz @bryanmcquade Thanks for moderating#WPOchat. We covered some good Q&A today! One thing for sure – we all love speed! #WEBperf -4:06 PM Jul 25th, 2011

cranstone Thanks #wpochat -4:05 PM Jul 25th, 2011

joshuabixby @bryanmcquade @jmarantz Thanks for organizing!#wpochat -4:05 PM Jul 25th, 2011

mrPerezMarc can we keep chatting or are we going to get booted? lol #wpochat -4:04 PM Jul 25th, 2011

mrPerezMarc @patmeenan @mrPerezMarc very cool I’ll take you up on that offer. #wpochat -4:03 PM Jul 25th, 2011

bryanmcquade Also will be giving a talk with Compuware on mobile perf optimization on Wednesday, if you are interested:http://bit.ly/qBGtIj #wpochat -4:03 PM Jul 25th, 2011

cweekly Good stuff, guys, thanks and see you next time! #wpochat-4:02 PM Jul 25th, 2011

jmarantz Thanks for participating everyone. It’s been a great discussion with lots of ideas & perspectives. Until the next#wpochat … #wpochat -4:02 PM Jul 25th, 2011

patmeenan @mrPerezMarc – send me a test result and the name of the CDN provider and I can take care of it #wpochat -4:02 PM Jul 25th, 2011

sajal @wpo_chat this timing is perfect… i usually just finish work and am in relaxed mood #wpochat -4:01 PM Jul 25th, 2011

bryanmcquade Thanks all for participating! If you have suggestions to make Page Speed better, find us at page-speed-discuss on Google Groups. #wpochat -4:01 PM Jul 25th, 2011

wpo_chat #WPOchat #4 has ended. Thank You – @jmarantz@bryanmcquade and the #webperf community. Look for an archive on www.wpochat.org #wpochat -4:01 PM Jul 25th, 2011

getify @wpo_chat A11: awareness of dynamic script loading. automatic generation of such syntax. #wpochat -4:01 PM Jul 25th, 2011

wpo_chat Remember – Topics, Moderators, Guests, Wanted – Comment on www.wpochat.org #wpochat #wpochat -4:01 PM Jul 25th, 2011

mrPerezMarc I really want to know why when I use WPT it tells me ii’m not using CDNs when i’m 10000% sure i am! #wpochat -4:01 PM Jul 25th, 2011

wpo_chat Did you enjoy this? Is the last Monday each month at 3pm ET a good time for you? Suggestions? #wpochat -4:01 PM Jul 25th, 2011

jmarantz RT @jonathanklein: @wpo_chat #wpochat A11 pre-fetching in mod_pagespeed #wpochat -4:00 PM Jul 25th, 2011

pagespeed @jonathanklein @wpo_chat A11 we’re working with WPT to merge rulesets. Hope to have that done soon! #wpochat -4:00 PM Jul 25th, 2011

mrPerezMarc @joshuabixby I’d just build a page for IE, should naturally work better for all other browsers #wpochat -4:00 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A11 page_speed should have all of the rules from YSlow and WPT  -4:00 PM Jul 25th, 2011

yottaa RT @pagespeed: RT @wpo_chat: Q11 What features would you most like to see added to Page Speed and mod_pagespeed?#wpochat -3:59 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A11 pre-fetching in mod_pagespeed (if it doesn’t exist already…I’m not up to date on features) -3:59 PM Jul 25th, 2011

pagespeed RT @wpo_chat: Q11 What features would you most like to see added to Page Speed and mod_pagespeed? #wpochat -3:58 PM Jul 25th, 2011

jonathanklein Nice! RT @jmarantz: @jonathanklein@bryanmcquade mod_pagespeed 0.9.18.2 auto-transcodes to webp for UAs that support (opera/Chrome) #wpochat -3:58 PM Jul 25th, 2011

cranstone A10 UA has a history of ambiguity – too many things in it to know for sure what is exactly at the other end #wpochat -3:58 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q11 What features would you most like to see added to Page Speed and mod_pagespeed? #wpochat -3:58 PM Jul 25th, 2011

joshuabixby A10 It boils down to knowing your audience, where they’re coming from, what browsers they’re using. Personal pref doesn’t matter. #wpochat -3:57 PM Jul 25th, 2011

wpo_chat Q11 What features would you most like to see added to Page Speed and mod_pagespeed? #wpochat -3:57 PM Jul 25th, 2011

cweekly (I meant to say poor use of UA detection) #wpochat -3:57 PM Jul 25th, 2011

getify @jmarantz @wpo_chat IMHO speed is a feature like any other. newer browsers get more of that feature than older browsers. #wpochat -3:57 PM Jul 25th, 2011

jmarantz @jonathanklein @bryanmcquade mod_pagespeed 0.9.18.2 auto-transcodes to webp for UAs that support (opera & Chrome) #wpochat -3:57 PM Jul 25th, 2011

yottaa RT @jmarantz: @getify @jmarantz @wpo_chat Site should work on old browsers. Should be fast on new browsers. #wpochat -3:57 PM Jul 25th, 2011

bryanmcquade A10 What causes UA to lie? If user configured it to do so, I say tough luck to the user. #wpochat -3:57 PM Jul 25th, 2011

sajal RT @cweekly: Haha, co-worker just reminded me of this: (XKCD, perils of poor UA detection) http://xkcd.com/869/#wpochat -3:56 PM Jul 25th, 2011

getify @jonathanklein @wpo_chat the older/more out of date the browser, the less effort should be spent optimizing it. #wpochat -3:56 PM Jul 25th, 2011

jmarantz @getify @jmarantz @wpo_chat Site should work on old browsers. Should be fast on new browsers. #wpochat -3:56 PM Jul 25th, 2011

coachwei @jonathanklein @getify IE6 is the most popular browser in China, btw. that’s the country with the biggest internet population today #wpochat -3:56 PM Jul 25th, 2011

cranstone A10 it’s all going to be “webkit” before we know it. All that’s missing is DPI and screen Height/Width #wpochat -3:56 PM Jul 25th, 2011

cweekly Haha, co-worker just reminded me of this: (XKCD, perils of poor UA detection) http://xkcd.com/869/ #wpochat -3:56 PM Jul 25th, 2011

jmarantz @getify @wpo_chat Drastic differences between modern browsers ok… But you must still have your site on old browsers. How? #wpochat -3:55 PM Jul 25th, 2011

getify @jmarantz @wpo_chat furthers the idea of browser lock-in and version dependence, which are counter to fast browser releases. #wpochat -3:55 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: A10 I like webp for browsers that support it. Big savings for image heavy sites. #wpochat -3:55 PM Jul 25th, 2011

mrPerezMarc @getify @wpo_chat yeah right, ever heard of microsoft! they are still 50-65% of our traffic #wpochat -3:55 PM Jul 25th, 2011

jonathanklein @getify @wpo_chat IE7 is still > 10% on our sites. It’s still pretty different from the latest Chrome builds #wpochat -3:55 PM Jul 25th, 2011

cranstone A10 – hard to tell if the UA is telling the truth. #wpochat-3:54 PM Jul 25th, 2011

bryanmcquade A10 I like webp for browsers that support it. Big savings for image heavy sites. #wpochat -3:54 PM Jul 25th, 2011

cweekly A10 Yes. UA-sniffing in app code is problematic, but in developing a WPO platform we can’t ignore big diffs in techniques per UA! #wpochat -3:54 PM Jul 25th, 2011

getify @wpo_chat A10: i think the days of there being drastic diffs between browsers are waning. becoming less important to distinguish. #wpochat -3:54 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: A10 agree UA sniffing is not ideal but waiting for new features to roll out in all browsers is worse. #wpochat -3:54 PM Jul 25th, 2011

jmarantz @getify @wpo_chat A10 why always bad? Can exploit features & improved perf curves on modern browers? What’s the downside? #wpochat -3:54 PM Jul 25th, 2011

bryanmcquade A10 agree UA sniffing is not ideal but waiting for new features to roll out in all browsers is worse. #wpochat -3:54 PM Jul 25th, 2011

sajal @wpo_chat A10 Not at the moment. Doubt it would make much difference on modern browsers (exclude >= IE8)#wpochat -3:53 PM Jul 25th, 2011

cranstone For Mobile everyone seems to assume it’s iPhone and sends that content (if they have it.) #wpochat -3:53 PM Jul 25th, 2011

mrPerezMarc @wpo_chat A10 yes, if it’s mobile of pc, other then that to hard to manage #wpochat -3:53 PM Jul 25th, 2011

jmarantz @mrPerezMarc @bryanmcquade automatic image-scaling: try mod_pagespeed!  #wpochat -3:53 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A10 the portions that go through @acceloweb do  -3:53 PM Jul 25th, 2011

getify @wpo_chat A10: no, definitely not. UA sniffing is always bad. sometimes (rarely) is it required, but always bad.#wpochat -3:53 PM Jul 25th, 2011

mrPerezMarc @bryanmcquade every tried an image scaler?#wpochat -3:52 PM Jul 25th, 2011

sajal @mrPerezMarc yeah… but these are very photo-ey jpgs …. not at all suited for png #wpochat -3:52 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q10 Does your site look at user-agent and deliver browser-specific content optimizations? #wpochat -3:52 PM Jul 25th, 2011

cweekly A9 IIRC interlacing may aid w/ jpg but hurts compression w/ png, benefits less clear? (tools like pngcrush make it optional…) #wpochat -3:52 PM Jul 25th, 2011

jonathanklein RT @getify: @wpo_chat A9: if i did have an image heavy site, i’d use spriting and data-uri’s before i used progressive rendering #wpochat -3:52 PM Jul 25th, 2011

wpo_chat Q10 Does your site look at user-agent and deliver browser-specific content optimizations? #wpochat -3:52 PM Jul 25th, 2011

getify @wpo_chat A9: if i did have an image heavy site, i’d use spriting and data-uri’s before i used progressive rendering#wpochat -3:52 PM Jul 25th, 2011

sajal @bryanmcquade @jonathanklein i would rather be 200ms slower than have wrong status codes… Google hates that..#wpochat -3:51 PM Jul 25th, 2011

jmarantz @jonathanklein @wpo_chat A9 progressive rendering discussion: http://goo.gl/1OMNu #wpochat -3:51 PM Jul 25th, 2011

bryanmcquade A9 loading lo-res first then hi-res later is an interesting optimization. Wish browsers, tools could automate this for me. #wpochat -3:51 PM Jul 25th, 2011

getify @wpo_chat again, nope. my sites are quite light on the image side, so no real point. #wpochat -3:51 PM Jul 25th, 2011

mrPerezMarc @sajal @wpo_chat you could always save with looseless compression where you don’t lose any quality on your images #wpochat -3:51 PM Jul 25th, 2011

bryanmcquade @bryanmcquade @sajal Also checking if backends/database down should be fast. Can do that before you decide response code. #wpochat -3:50 PM Jul 25th, 2011

mrPerezMarc q9: jpegtran with the -progressive command on image >10k #wpochat -3:50 PM Jul 25th, 2011

sajal @wpo_chat A9 not doing it right now… but looking to do it for an image heavy site where image quality is important. wl use gimp #wpochat -3:50 PM Jul 25th, 2011

bryanmcquade @sajal @bryanmcquade It’s a risk you have to take. Commit to 200 response code to save user 200ms of waiting for first paint. #wpochat -3:49 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A9 nope – would love to hear more about it though. -3:49 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q9 Does your site employ progressive rendering of images? What tools do you use to manage this?#wpochat -3:49 PM Jul 25th, 2011

getify @wpo_chat A8: i manually “chunk” by using XHR to lazy load content after page load. #wpochat -3:49 PM Jul 25th, 2011

yottaa @jonathanklein We would not miss it! We at @Yottaa all live for speed. We want every website to be fast. #WPOchat -3:49 PM Jul 25th, 2011

bryanmcquade A8 First chunk early = browser fetches external resources in static header sooner = much faster page loads. HTML shld chunked. #wpochat -3:48 PM Jul 25th, 2011

getify @wpo_chat A8: all at the same time… i rarely have pages big enough where chunking would be worth the effort.#wpochat -3:48 PM Jul 25th, 2011

sajal @bryanmcquade but… you do have to do computations to decide the response code before sending the static header… is it worth it? #wpochat -3:48 PM Jul 25th, 2011

jonathanklein @jmarantz #wpochat yeah exactly, something that would causing a non-200 response -3:48 PM Jul 25th, 2011

jmarantz @jonathanklein @wpo_chat A8 An error discovered in the server, you mean? Like a DB error or server overload? #wpochat -3:47 PM Jul 25th, 2011

jonathanklein RT @wpo_chat: Q8 Does your site deliver dynamically generated HTML in chunks as its being computed, or deliver all the HTML at the same time? #wpochat -3:47 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: A8 Chunking ideal for sites that have dynamic content with static header. Push static header down in || with content generatation #wpochat -3:46 PM Jul 25th, 2011

bryanmcquade A8 Chunking ideal for sites that have dynamic content with static header. Push static header down in || with content generatation #wpochat -3:46 PM Jul 25th, 2011

cranstone @jmarantz @bryanmcquade @mrPerezMarc @Pagespeed- all. The OS needs a tweak. #wpochat -3:45 PM Jul 25th, 2011

joshuabixby Good question. RT @jmarantz @bryanmcquade A7 Which optimization would you skip because it’s too painful?#wpochat -3:45 PM Jul 25th, 2011

getify @cweekly @wpo_chat separate certs not so much a barrier, but needing a separate IP per cert, THAT is a problem. #wpochat -3:45 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A8 We do NOT chunk, risks flushing a page to the user when we actually have errors on it. Prefer to redirect on error -3:45 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q8 Does your site deliver dynamically generated HTML in chunks as its being computed or deliver all the HTML at once? #wpochat -3:45 PM Jul 25th, 2011

getify @sajal @bryanmcquade CDN providers are most decidedly NOT cookie-less domains. and many send lots of wasteful extra headers #wpochat -3:45 PM Jul 25th, 2011

wpo_chat Q8 Does your site deliver dynamically generated HTML in chunks as its being computed, or deliver all the HTML at the same time? #wpochat -3:44 PM Jul 25th, 2011

jmarantz @bryanmcquade @cranstone @mrPerezMarc @Pagespeedwhich Android HW is slow? Current? Old? All? #wpochat -3:44 PM Jul 25th, 2011

jonathanklein @yottaa @joshuabixby @jmarantz #wpochat We have you three from the auto-optimize camp, where are@aptimize, @acceloweb and the rest ? -3:44 PM Jul 25th, 2011

cranstone @bryanmcquade @mrPerezMarc @Pagespeed Agreed. But until is – be careful what you send and how you send it.#wpochat -3:44 PM Jul 25th, 2011

cweekly @getify @cweekly @wpo_chat A6: (separate SSL certs for cookie-less HTTPS domains) — ok, but that’s a pretty low barrier, no? #wpochat -3:43 PM Jul 25th, 2011

bryanmcquade @cranstone @mrPerezMarc @Pagespeed That can be optimized in the Android stack. Lets not discourage chunking. Lets get Android fixed #wpochat -3:43 PM Jul 25th, 2011

jmarantz @bryanmcquade A7 Would optimization would you skip because it’s too painful? Spriting? Long cache lifetime? #wpochat -3:42 PM Jul 25th, 2011

joshuabixby Agree. RT @bryanmcquade A7 use an automated solution to do the core things… #wpochat #wpochat -3:42 PM Jul 25th, 2011

sajal @getify @bryanmcquade or… just use the CDN providers cert…. you are using CDN for static files… right? #wpochat -3:42 PM Jul 25th, 2011

cranstone @mrPerezMarc @Pagespeed from what we’ve learned send compressed, or chunked but not both. #wpochat -3:42 PM Jul 25th, 2011

yottaa RT @bryanmcquade: A7 use an automated solution to do the core things like minification, implement things like prefetching etc manually based on data. #wpochat -3:42 PM Jul 25th, 2011

bryanmcquade A7 @jmarantz mod_pagespeed works well for automated optimizations  #wpochat -3:42 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: A7 use an automated solution to do the core things like minification, implement things like prefetching etc manually based on data. #wpochat -3:41 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A7 Automate processes so the site can be fast AND maintainable. Most perf improvements don’t hurt maintainability -3:41 PM Jul 25th, 2011

getify @cweekly @wpo_chat have to have separate SSL certs for cookie-less domains… which requires a separate IP on your server#wpochat -3:41 PM Jul 25th, 2011

mrPerezMarc @cranstone @Pagespeed so should we just send info decompressed? #wpochat -3:41 PM Jul 25th, 2011

cweekly @sajal @getify @wpo_chat A6: security is *hard*. can’t easily define what’s “safe” to inject in HTTPS, so “nothing” is the answer. #wpochat -3:41 PM Jul 25th, 2011

bryanmcquade A7 use an automated solution to do the core things like minification, implement things like prefetching etc manually based on data. #wpochat -3:40 PM Jul 25th, 2011

sajal @wpo_chat depends on case by case. for maintability we make build scripts which apply optimizations w/o harassing devs #wpochat -3:40 PM Jul 25th, 2011

jonathanklein @sajal @getify you clearly aren’t taking credit card info  #wpochat -3:40 PM Jul 25th, 2011

cranstone @Pagespeed Testing on Android shows it’s incredibly slow to dechunck and decompress Gzip content. Servers are not the problem #wpochat -3:39 PM Jul 25th, 2011

getify @wpo_chat A7: you train developers to code “fast by default” so it’s part of the culture, reviews, etc. #wpochat -3:39 PM Jul 25th, 2011

sajal RT @getify: @wpo_chat A6: also, i think browsers need to allow static content (CSS, images, etc) over HTTP on HTTPS pages#wpochat -3:39 PM Jul 25th, 2011

sajal @getify @jonathanklein slow > insecure anyday…. #wpochat… havent personally dealt with https much. -3:39 PM Jul 25th, 2011

getify @wpo_chat A6: also, i think browsers need to allow static content (CSS, images, etc) over HTTP on HTTPS pages#wpochat -3:39 PM Jul 25th, 2011

cweekly @getify @wpo_chat A6: (HTTPS session cookie bloat) = all the more important to use cookie-less domains for static assets, right? #wpochat -3:39 PM Jul 25th, 2011

jonathanklein @getify @sajal #wpochat security is obviously paramount in my mind, but you can mitigate the perf problems with HTTPS to an extent -3:39 PM Jul 25th, 2011

yottaa RT @wpo_chat: Q7 How do you balance the trade-offs between site maintainability and speed? #wpochat -3:38 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q7 How do you balance the trade-offs between site maintainability and speed? #wpochat -3:38 PM Jul 25th, 2011

pagespeed @cranstone why is chunk+compress worst? Are you using a Java-based server that doesn’t properly flush chunked compressed responses? #wpochat -3:38 PM Jul 25th, 2011

getify @sajal @jonathanklein but which is better, slow site or insecure site? #wpochat -3:38 PM Jul 25th, 2011

jonathanklein @sajal Right so agree on pre-fetching, not on whole site HTTPS  #wpochat -3:37 PM Jul 25th, 2011

mrPerezMarc A6: I think HTTPS should be used for what is was meant for! Secure transaction only! #wpochat -3:37 PM Jul 25th, 2011

wpo_chat Q7 How do you balance the trade-offs between site maintainability and speed? #wpochat -3:37 PM Jul 25th, 2011

sajal @jonathanklein i dun wana goto shopping site with wallet in hand and checkout page takes forever cause https files r not in cache #wpochat -3:37 PM Jul 25th, 2011

getify @wpo_chat A6: also, HTTPS connections are more likely to have session cookies (bloating all requests) than HTTP is#wpochat -3:36 PM Jul 25th, 2011

sajal @jonathanklein yeah… but then need to precache https assets async manner on http pages… so the switch is instant#wpochat -3:36 PM Jul 25th, 2011

cranstone HTTPS on mobile can be very slow, especially if content is chunked and compressed. (That’s the worst performance case)#wpochat -3:36 PM Jul 25th, 2011

jonathanklein @sajal #wpochat Yeah but then you pay the penalty of HTTPS for every request. What about ecommerce with a really small % of HTTPS visits? -3:36 PM Jul 25th, 2011

bryanmcquade @yottaa @cweekly RE: Cache-Control: public I think that was required for old versions of Firefox. public no longer needed. @getify? #wpochat -3:35 PM Jul 25th, 2011

jmarantz @bluesmoon @wpo_chat Proxy caches should *not* work when using https independent of cc:private #wpochat -3:35 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A6 CDN’s can also charge more for serving static content via HTTPS -3:34 PM Jul 25th, 2011

sajal @wpo_chat A6: Stick with http or https version for a site, not both… more cache misses if user bounces between the 2..#wpochat -3:34 PM Jul 25th, 2011

getify @wpo_chat A6: HTTPS can affect the cacheability of content in various proxies #wpochat -3:34 PM Jul 25th, 2011

yottaa RT @cweekly: A6 have to take care to be explicit about setting cache-control public since default cache rules favor privacy > perf in HTTPS #wpochat -3:34 PM Jul 25th, 2011

hsimon @wpo_chat A6: China/firewalls #wpochat -3:33 PM Jul 25th, 2011

jmarantz @cranstone Yes, whatever client your users use#wpochat -3:33 PM Jul 25th, 2011

bluesmoon @wpo_chat A6 with HTTPS, proxy caches may not work. cache-control: private may be needed. #wpochat -3:33 PM Jul 25th, 2011

cweekly A6 have to take care to be explicit about setting cache-control public since default cache rules favor privacy > perf in HTTPS #wpochat -3:33 PM Jul 25th, 2011

bryanmcquade A6 no proxy caching on SSL. SSL CDN can help, otherwise users will be going to your origin server. #wpochat -3:33 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A6 Not a perf consideration, but have to be careful of mixed content warnings. Seen that a time or two… -3:33 PM Jul 25th, 2011

cranstone RE: HTTP and HTTPS are we just talking desktop here or Mobile? #wpochat -3:32 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q6 What are the web performance considerations when migrating a site from HTTP to HTTPS?How do best practices differ? #wpochat -3:32 PM Jul 25th, 2011

yottaa RT @bryanmcquade: RT @getify: A5: we all need to be capturing and remote-logging all the data made available to pages by the Web Timing specs #wpochat -3:32 PM Jul 25th, 2011

sajal @jonathanklein when using google hosted jquery, i preload that into WPT, and then test how site performs if user hs it in cache #wpochat -3:32 PM Jul 25th, 2011

joshuabixby @jonathanklein @wpo_chat A5 Aha. Sometimes I lose track of my own blog posts.  #wpochat -3:31 PM Jul 25th, 2011

bluesmoon @wpo_chat boomerang captures and beacons back everything from the WebTiming API for browsers that support it #wpochat -3:31 PM Jul 25th, 2011

wpo_chat Q6 What are the web performance considerations when migrating a site from HTTP to HTTPS? How do best practices differ on HTTPS? #wpochat -3:31 PM Jul 25th, 2011

bryanmcquade RT @getify: A5: we all need to be capturing and remote-logging all the data made available to pages by the Web Timing specs #wpochat -3:31 PM Jul 25th, 2011

jmarantz @mrPerezMarc @jonathanklein @wpo_chat Simulating passage of time to see next-day cache effect in waterfall needs more tooling #wpochat -3:31 PM Jul 25th, 2011

jonathanklein @sajal Good point, plus filtering to exclude requests. Love the advanced features of WPT though I forget about them at times #wpochat -3:31 PM Jul 25th, 2011

joshuabixby @jonathanklein @wpo_chat This one? Is it time to give up Internet Explorer 7 as our default test scenario?http://bit.ly/eavC4g #wpochat -3:30 PM Jul 25th, 2011

mrPerezMarc @bryanmcquade @sajal @wpo_chat 43% of my users still use IE, that’s how i optimize for #wpochat -3:30 PM Jul 25th, 2011

bryanmcquade A5 ResourceTiming (http://w3c-test.org/webperf/specs/ResourceTiming/) useful but third-party content is excluded by default  #wpochat -3:30 PM Jul 25th, 2011

mrPerezMarc @jonathanklein @wpo_chat true, but sometimes cache isn’t set up properly, eleminate conditional gets if possible#wpochat -3:30 PM Jul 25th, 2011

sajal @jonathanklein you can preload stuff in WPT using their scripting options… to get more real… #wpochat -3:29 PM Jul 25th, 2011

bryanmcquade @sajal @wpo_chat which network conditions are representative of your users? How do you know? Which browsers?#wpochat -3:29 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A5 @joshuabixby I think I found it: http://j.mp/p5RFoy -3:29 PM Jul 25th, 2011

jmarantz RT @sajal: @wpo_chat A5 : 10 run test ; 20 see waterfal chart ; 30 goto 10 #wpochat (switch locations a lot as well)#wpochat -3:29 PM Jul 25th, 2011

getify @wpo_chat A5: we all need to be capturing and remote-logging all the data made available to pages by the Web Timing specs #wpochat -3:29 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A5 waterfalls from perf tools are typically the empty cache experience, whereas most people have partially full cache. -3:29 PM Jul 25th, 2011

sajal @wpo_chat A5 : 10 run test ; 20 see waterfal chart ; 30 goto 10 #wpochat (switch locations a lot as well) -3:28 PM Jul 25th, 2011

dcmouyard RT @bryanmcquade: A4 Page Speed Online has a mobile mode, can fetch with a mobile user agent:http://pagespeed.googlelabs.com/ #wpochat -3:28 PM Jul 25th, 2011

mrPerezMarc @wpo_chat a5: i always test for IE, cause FF chrome 100% certain results will be better #wpochat -3:28 PM Jul 25th, 2011

cweekly A5 Mix of synthetic and RUM. #wpochat -3:28 PM Jul 25th, 2011

getify @wpo_chat A3: also, mobile (& desktop) browsers need to proactively cache common CDN resources and DNS lookups more aggressively #wpochat -3:27 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A5 Good question, I think@joshuabixby has a blog post about this…Joshua? -3:27 PM Jul 25th, 2011

mrPerezMarc @dcmouyard @mrPerezMarc I’m also proposing to load the iframes after the onload #wpochat -3:27 PM Jul 25th, 2011

hsimon @mrPerezMarc in general you can. consider using a script loader like LABjs #wpochat -3:27 PM Jul 25th, 2011

joshuabixby A4 We’ve got a pretty current list of mobile tools on the Strangeloop WPO Hub (scroll down): http://bit.ly/pQpcjA#wpochat -3:27 PM Jul 25th, 2011

bryanmcquade A5 tricky to know which browser to choose (IE7, IE8 very different), also which network configurations are representative. #wpochat -3:27 PM Jul 25th, 2011

wpo_chat Q5 How do you make sure waterfalls generated from e.g. WPT are representative of actual user experience?#wpochat -3:26 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: A4 Page Speed Online has a mobile mode, can fetch with a mobile user agent:http://pagespeed.googlelabs.com/ #wpochat -3:26 PM Jul 25th, 2011

mrPerezMarc a4: i use http://www.webpagetest.org/ #wpochat -3:26 PM Jul 25th, 2011

bryanmcquade A4 Page Speed Online has a mobile mode, can fetch with a mobile user agent: http://pagespeed.googlelabs.com/#wpochat -3:25 PM Jul 25th, 2011

yottaa RT @getify: @wpo_chat A4: we also need more remote debugging, like chrome webinspector and dragonfly do. and we need tools IN tablet browsers. #wpochat -3:25 PM Jul 25th, 2011

sajal RUM FTW! RT @bluesmoon: @wpo_chat boomerang works for mobile  #wpochat -3:25 PM Jul 25th, 2011

mrPerezMarc @dcmouyard @mrPerezMarc I put most of my JS on the bottom, jquery is the only one i can’t move lower #wpochat -3:25 PM Jul 25th, 2011

getify @wpo_chat A4: we also need more remote debugging, like chrome webinspector and dragonfly do. and we need tools IN tablet browsers. #wpochat -3:24 PM Jul 25th, 2011

bluesmoon @wpo_chat boomerang works for mobile #wpochat -3:24 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A4 Better simulations on the desktop, small screens make WPO analysis tough -3:24 PM Jul 25th, 2011

dcmouyard @mrPerezMarc Make sure the aggregated scripts are last in the html since they can block the loading of other page elements. #wpochat -3:24 PM Jul 25th, 2011

unixland RT @bryanmcquade: @cranstone Wow, enabling gzip on Android? Can you share details? #wpochat -3:24 PM Jul 25th, 2011

sajal RT @getify: @wpo_chat A4: simulated network/packet drops for more “real” loading performance measurements #wpochat -3:23 PM Jul 25th, 2011

bryanmcquade A4 Jdrop is nice but using bookmarklets is a pain.#wpochat -3:23 PM Jul 25th, 2011

getify @wpo_chat A4: simulated network/packet drops for more “real” loading performance measurements #wpochat -3:23 PM Jul 25th, 2011

mrPerezMarc @dcmouyard @mrPerezMarc I came accross this problem, agragate as much as possible and have cache and etag properly set #wpochat -3:22 PM Jul 25th, 2011

jmarantz RT @wpo_chat: Q4 What resources/tools do you use for mobile perf? What features would you like to see in mobile perf tools? #wpochat -3:22 PM Jul 25th, 2011

wpo_chat Q4 What resources/tools do you use for analyzing mobile performance? What features would you like to see in mobile perf tools? #wpochat -3:22 PM Jul 25th, 2011

bryanmcquade A3 minimize number of round-trips before first paint. App cache is good at this (App cache = zero round trips!)#wpochat -3:21 PM Jul 25th, 2011

sajal Its PITA to browse many sites using egde … Thailand still doesnt have proper usable 3G .. #wpochat #FML -3:21 PM Jul 25th, 2011

jmarantz @wpo_chat A3 What’s the trend in mobile browser caches? Getting larger? Or is cache on mobile ineffective?#wpochat -3:21 PM Jul 25th, 2011

bluesmoon @wpo_chat queue up async requests to make multiple requests on a single call, and buffer to deal with connection loss #wpochat -3:21 PM Jul 25th, 2011

cweekly RT @jonathanklein: @wpo_chat #wpochat A3 Progressive enhancement = name of the game – no img gradients or rnd corners. CSS3 FTW. #wpochat -3:21 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A3 mobile is low bandwidth and high latency, send a small amount of data with few HTTP requests. -3:20 PM Jul 25th, 2011

dcmouyard @mrPerezMarc Should the site’s entire styles/scripts be aggregated, or separated by sections/functions on the site?#wpochat -3:20 PM Jul 25th, 2011

getify @wpo_chat A3: HTTP pipeline’ing (ala SPDY, etc) pipeline responses across a single TCP connection #wpochat -3:20 PM Jul 25th, 2011

dcmouyard @mrPerezMarc The main problem I’ve found with aggregation is deciding on what scripts/styles to aggregate.#wpochat -3:20 PM Jul 25th, 2011

bryanmcquade A3 Using touch events (touchstart, touchend, etc) as opposed to click events, makes mobile apps feel snappier.#wpochat -3:20 PM Jul 25th, 2011

sajal @wpo_chat A3 keep the mobile version as light and async as possible. for people in countries that dont have 3G #wpochat-3:20 PM Jul 25th, 2011

mrPerezMarc @dcmouyard @mrPerezMarc i believe you, i just have to believe my waterfall more after the testing has been done #wpochat -3:20 PM Jul 25th, 2011

jmarantz @mrPerezMarc @bryanmcquade It’s pretty easy to turn on gzip by content-type or extension in Apache #wpochat -3:20 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A3 Progressive enhancement is the name of the game – no image gradients or rounded corners. CSS3 all the way. -3:19 PM Jul 25th, 2011

mrPerezMarc @bryanmcquade a2: i notice many people turn on gzip and apply it to images, that’s a big no no #wpochat -3:19 PM Jul 25th, 2011

bluesmoon @wpo_chat an app cache is good for public data. For user private data (login required) security becomes more imp than performance #wpochat -3:18 PM Jul 25th, 2011

wpo_chat Q3 Besides app cache, what other performance optimizations are most important for mobile? #wpochat -3:18 PM Jul 25th, 2011

dcmouyard @mrPerezMarc Aggregating & minifying scripts/styles shouldn’t increase load time. #wpochat -3:18 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat @bryanmcquade This brings up another question – when to pre-fetch and when to use app cache? -3:18 PM Jul 25th, 2011

bryanmcquade A2 a single failure (e.g. a single redirect for any of the resources on the page) means the whole app cache is invalid.#wpochat -3:18 PM Jul 25th, 2011

bluesmoon @wpo_chat I’ve written code on bluesmoon.info that overrides document.write to allow async loading of third party widgets #wpochat -3:17 PM Jul 25th, 2011

mrPerezMarc @sajal @getify @mrPerezMarc i like your style of fun! i’ve gone as far as delay the loading the iframe cont. 2 after the onload #wpochat -3:17 PM Jul 25th, 2011

bryanmcquade A2 App cache is awesome because it can make a web app load instantly (feel like a native app), but… #wpochat -3:16 PM Jul 25th, 2011

jonathanklein @coachwei I think HTML5 app cache in this case#wpochat -3:16 PM Jul 25th, 2011

patmeenan @coachwi HTML5 App Cache I assume #wpochat -3:16 PM Jul 25th, 2011

getify @wpo_chat A2: appcache has some potential. biggest detractor i see is you can’t re-verify only part of the cache. all or nothing. #wpochat -3:16 PM Jul 25th, 2011

yottaa RT @cweekly: @mrPerezMarc @getify @wpo_chat A1 DOM manipulation is not hard, relatively easy 1:1 replacement for document.write() #wpochat -3:16 PM Jul 25th, 2011

coachwei A2 App Cache? Do you mean SW like Varnish or HW like ADC devices, or both? #wpochat -3:16 PM Jul 25th, 2011

sajal @getify @mrPerezMarc im thinking of making a firefox extention that makes document.write useless… just for fun#wpochat -3:15 PM Jul 25th, 2011

cweekly @mrPerezMarc @getify @wpo_chat A1 DOM manipulation is not hard, relatively easy 1:1 replacement for document.write()#wpochat -3:15 PM Jul 25th, 2011

sajal Dear non speed junkies… pls ignore me for a while while i tweet #wpochat -3:14 PM Jul 25th, 2011

bryanmcquade RT @wpo_chat: Q2 Have you used an app cache for any of your sites? What are the benefits? What do you dislike about app cache? #wpochat -3:14 PM Jul 25th, 2011

mrPerezMarc @getify @wpo_chat A1:Killing is, no problem, i’ll go genecidal on their asses, question is, how do you replace them?#wpochat -3:14 PM Jul 25th, 2011

jonathanklein RT @wpo_chat: Q2 Have you used an app cache for any of your sites? What are the benefits of app cache? What do you dislike about app cache? #wpochat -3:14 PM Jul 25th, 2011

jmarantz @cweekly @getify @wpo_chat The fun part of web development is nothing dies…must engineer around it. #wpochat -3:13 PM Jul 25th, 2011

sajal RT @hsimon: RT @getify: @wpo_chat A1: also, kill document.write(). now. seriously. go right now and kill it. single biggest perf detractor IMHO #wpochat -3:13 PM Jul 25th, 2011

hsimon RT @getify: @wpo_chat A1: also, kill document.write(). now. seriously. go right now and kill it. single biggest perf detractor IMHO #wpochat -3:13 PM Jul 25th, 2011

joshuabixby @coachwei @patmeenan A1 And 3rd-party tags can result in a surprising number of 4th-party calls and redirects.#wpochat -3:13 PM Jul 25th, 2011

coachwei @dcmouyard these are lots you can do for CMS, from external WPO service to internal code optimization. #wpochat -3:13 PM Jul 25th, 2011

sajal @wpo_chat A2 No i havent tried yet. But looking to start using it soon for a mobile site #wpochat -3:13 PM Jul 25th, 2011

cranstone @bryanmcqudade – latest devices. Will post a snapshot to you with all the times. Amazing level of detail #wpochat -3:13 PM Jul 25th, 2011

cweekly RT @getify: @wpo_chat A1: also, kill document.write(). now. seriously. go right now and kill it. single biggest perf detractor IMHO #wpochat -3:13 PM Jul 25th, 2011

getify @wpo_chat A1: also, kill document.write(). now. seriously. go right now and kill it. single biggest perf detractor IMHO #wpochat -3:12 PM Jul 25th, 2011

mrPerezMarc @dcmouyard I’ve tested minification on css and js and the site takes longer to load? Any clues as to y? #wpochat -3:12 PM Jul 25th, 2011

wpo_chat Q2 Have you used an app cache for any of your sites? What are the benefits of app cache? What do you dislike about app cache? #wpochat -3:12 PM Jul 25th, 2011

bryanmcquade A1 @cranstone is this on the oldest Android devices (e.g. G1) or also on recent devices? Is it CPU bottleneck or bad gzip impl? #wpochat -3:12 PM Jul 25th, 2011

coachwei @patmeenan They do slow down quite a bit because each widget typically results in meay requests. #wpochat -3:12 PM Jul 25th, 2011

joshuabixby @bryanmcquade @coachwei A1 3rd party content is a bit of a wild card. First step is to analyze waterfall and find culprits. #wpochat -3:11 PM Jul 25th, 2011

mrPerezMarc @dcmouyard A1: I’ve noticed that, as well, but how do we go about solving these issues? #wpochat -3:11 PM Jul 25th, 2011

hsimon @bryanmcquade @coachwei don’t copy&paste the tutorial code, consider async loading as late as possible #wpochat -3:11 PM Jul 25th, 2011

dcmouyard A1: The solution is aggregation & minification of images, scripts, and stylesheets. #wpochat -3:11 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A1 totally agree on 3rd party content, those are HTTP request you can’t really control -3:11 PM Jul 25th, 2011

mrPerezMarc @cweekly kinda hard to tell that to a dev team#wpochat -3:10 PM Jul 25th, 2011

patmeenan @wpo_chat A1 do the widgets REALLY slow down the sites much (loaded async) or do they just push onLoad?#wpochat -3:10 PM Jul 25th, 2011

dcmouyard A1: The biggest performance bottleneck for CMS implementations is usually the size & number of HTTP requests.#wpochat -3:10 PM Jul 25th, 2011

cranstone Very soon. We’ve seen Android taking upwards of 2 seconds to decompress HTML. We’ll have details in the next rev#wpochat -3:10 PM Jul 25th, 2011

cweekly A1 diff answers for diff kinds of sites. For a typical site, it’s outdated web development practices, ignorance… #wpochat -3:09 PM Jul 25th, 2011

bryanmcquade @cranstone Wow, enabling gzip on Android? Can you share details? #wpochat -3:09 PM Jul 25th, 2011

yottaa Several @Yottaa team members are on the #WPOchattoday. Great resource for the #WEBperf community -3:09 PM Jul 25th, 2011

bryanmcquade A1 @coachwei Also agree that third-party snippets can slow down sites. What are best practices to speed them up?#wpochat -3:08 PM Jul 25th, 2011

jonathanklein @mrPerezMarc @wpo_chat I like synthetic tools (we use Catchpoint) + RUM tools (we use Coradiant). There are free versions as well #wpochat -3:08 PM Jul 25th, 2011

getify @wpo_chat A1: … so, use a script loader that is performance oriented. like perhaps LABjs.  #wpochat -3:08 PM Jul 25th, 2011

cranstone For Mobile it can be the carriers and also (this is amazing) using Gzip compression on Android #wpochat -3:08 PM Jul 25th, 2011

jmarantz A1: Apache is not configured to turn gzip on by default.#wpochat -3:08 PM Jul 25th, 2011

mrPerezMarc @getify @wpo_chat A1: how would you solve that?#wpochat -3:08 PM Jul 25th, 2011

bryanmcquade A1 @getify Agree that poor script loading can be a problem. What are techniques to make script loading efficient?#wpochat -3:08 PM Jul 25th, 2011

joshuabixby A1 One of the fastest-growing problems I’m seeing these days is third-party tags. Getting worse by the month.#wpochat -3:08 PM Jul 25th, 2011

coachwei A1 I think its FBConnect, twitter and Google+. Every site wants then but they are huge slowing factors. #wpochat -3:07 PM Jul 25th, 2011

jonathanklein @wpo_chat remember you can write all answers “at” wpo_chat to reduce follower spam #wpochat -3:07 PM Jul 25th, 2011

mrPerezMarc @jonathanklein @wpo_chat what tools would you use to test the performance of a site? #wpochat -3:07 PM Jul 25th, 2011

getify @wpo_chat A1: i find that poor script loading performance is the biggest bottleneck, sometimes as much as 70% of the page load time #wpochat -3:07 PM Jul 25th, 2011

patmeenan @wpo_chat Pat here (WebPagetest/Google)#wpochat -3:07 PM Jul 25th, 2011

patmeenan sorry for the upcoming spam, hopping on the #wpochat-3:06 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat A1 Latency is always a problem, CDNs help as do more datacenters, but there’s no silver bullet -3:06 PM Jul 25th, 2011

joshuabixby Hey all. Josh Bixby from Strangeloop here. #wpochat -3:06 PM Jul 25th, 2011

getify @wpo_chat A0: Im a javascript snob and web performance afficanado. i wrote the LABjs performance script loader. i work for mozilla. #wpochat -3:05 PM Jul 25th, 2011

coachwei @jmarantz not sure why. your twitter profile photo is missing from my chat window. #wpochat -3:05 PM Jul 25th, 2011

wpo_chat Q1 What are the biggest performance bottlenecks on the web today? What can be done to address them? #wpochat-3:05 PM Jul 25th, 2011

wpo_chat Ok, great –let’s start with Question 1. Today’s Moderators are @bryanmcquade and @jmarantz #wpochat -3:05 PM Jul 25th, 2011

wpo_chat Remember Topics and Moderators are needed for the next chat! Leave a comment on www.wpochat.org Question 1 coming up. #wpochat -3:04 PM Jul 25th, 2011

cweekly Hi everyone! Chris Weekly here from Yottaa. Psyched for this chat. #wpochat -3:04 PM Jul 25th, 2011

cranstone Peter Cranstone here from 3pmoible #wpochat -3:04 PM Jul 25th, 2011

eitanmk @wpo_chat Eitan Konigsburg here from The New York Times. #wpochat -3:03 PM Jul 25th, 2011

jonathanklein @wpo_chat #wpochat Hi everyone, Jonathan Klein here from CSN Stores. Welcome! -3:02 PM Jul 25th, 2011

bryanmcquade Hi everyone. Welcome to today’s chat! I’m technical lead of Page Speed. @jmarantz and I are moderating today.#wpochat -3:02 PM Jul 25th, 2011

jmarantz Hi everyone: jmarantz here for mod_pagespeed here with bmcquade for the wpochat #wpochat -3:02 PM Jul 25th, 2011

coachwei Hi. Coach Wei from Yottaa here. Really interested in learnging from Google Page Speed folks today. #wpochat -3:02 PM Jul 25th, 2011

instwave #WPOchat starting now! Pardon my tweets if any. -3:02 PM Jul 25th, 2011

mrPerezMarc My name is Marc Perez, i’m an Senior SEO specialist, and I research new ways to optimize web pages on all fronts#wpochat -3:02 PM Jul 25th, 2011

bluesmoon @wpo_chat I’m Philip Tellis, and I’m in the internet industry. I like to study web performance and security.#wpochat -3:01 PM Jul 25th, 2011

dcmouyard I work mostly in Drupal as a front-end developer.#wpochat -3:01 PM Jul 25th, 2011

wpo_chat Let’s take a few minutes – please introduce yourself – what you do, what industry you are in etc. #wpochat -3:00 PM Jul 25th, 2011

jmarantz I’m hosting #wpochat with @bcmquade to discuss web performance. http://t.co/BusIqND #wpochat – you may see a lot of tweets for the next hour -3:00 PM Jul 25th, 2011

wpo_chat Today’s Moderators are Bryan McQuade@bryanmcquade and Joshua Marantz @jmarantz from Google#wpochat -3:00 PM Jul 25th, 2011

wpo_chat Questions and Replies are numbered Tweets start with Q1 (moderator) and Your Reply Should Include A1#wpochat -3:00 PM Jul 25th, 2011

wpo_chat Welcome to #WPOchat! Over the next 60 minutes the moderators will Ask Questions and Seek Your Answers.#wpochat -3:00 PM Jul 25th, 2011

getify RT @wpo_chat: #WPOchat starts in 5 minutes. Remember to Tweet and tell your followers you are participating in a Twitter Chat #wpochat -2:59 PM Jul 25th, 2011

joshuabixby #wpochat starts in 2 minutes. I’ll be popping my head in when I can. If you’re not into WPO, pardon the tweets. -2:58 PM Jul 25th, 2011

mrPerezMarc RT @wpo_chat: #WPOchat starts in 5 minutes. Remember to Tweet and tell your followers you are participating in a Twitter Chat #wpochat -2:57 PM Jul 25th, 2011

wpo_chat To make chatting easier we recommend the following web client: http://tweetchat.com/room/wpochat#WPOchat #wpochat -2:57 PM Jul 25th, 2011

wpo_chat #WPOchat starts in 5 minutes. Remember to Tweet and tell your followers you are participating in a Twitter Chat#wpochat -2:56 PM Jul 25th, 2011

bryanmcquade I’ll be participating in #wpochat for the next hour. Please excuse my tweets. You can find the chat log athttp://www.wpochat.org/ #wpochat -2:56 PM Jul 25th, 2011

yottaa RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more:http://t.co/4GoESW6 -2:56 PM Jul 25th, 2011

jonathanklein Please execuse my tweets for the next hour. I’ll be in a twitter chat on #WPO from 3-4pm today. #wpochat -2:55 PM Jul 25th, 2011

coachwei Execuse my tweets in the next hour. I’ll be on twitter chat on #WPO from 3-4pm today. #wpochat -2:54 PM Jul 25th, 2011

coachwei RT @bryanmcquade: Ill be hosting #wpochat with@jmarantz to discuss web performance. http://t.co/4GoESW6#wpochat -2:51 PM Jul 25th, 2011

squdgy RT @wpo_chat: TODAY! 3pm ET Join #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/uhPc3Ak #webperf -2:45 PM Jul 25th, 2011

strangeloopnet RT @wpo_chat: #WPOchat starts in 50 minutes. Great set of questions from the #Webperf community.@bryanmcquade @jmarantz from Google moderate today -2:33 PM Jul 25th, 2011

smtack RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more: http://t.co/4GoESW6 -2:28 PM Jul 25th, 2011

jonathanklein RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more: http://t.co/4GoESW6 -2:11 PM Jul 25th, 2011

wpo_chat #WPOchat starts in 50 minutes. Great set of questions from the #Webperf community. @bryanmcquade@jmarantz from Google moderate today -2:11 PM Jul 25th, 2011

sweetlew RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more: http://t.co/4GoESW6 -2:09 PM Jul 25th, 2011

getify RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more:http://t.co/4GoESW6 -2:04 PM Jul 25th, 2011

souders RT @bryanmcquade: I’ll be hosting #wpochat in 90 minutes with @jmarantz. Join in to discuss web performance. Learn more: http://t.co/4GoESW6 -2:02 PM Jul 25th, 2011

bluesmoon @souders hey, you gonna join us on #wpochat today? -1:42 PM Jul 25th, 2011

jonathanklein RT @yottaa: Have you used Google’s Page Speed? Join #WPOchat 3pm ET today with @bryanmcquade @jmarantz of Google http://t.co/NdqpPqJ #webdev -1:40 PM Jul 25th, 2011

utollwi Twitter Chat at 3pm ET today. #WPOchat with Website Performance Experts from Google and around the worldhttp://t.co/2jLhjQV #SEO -1:40 PM Jul 25th, 2011

bryanmcquade I’ll be hosting #wpochat in 90 minutes with@jmarantz. Join in to discuss web performance. Learn more:http://t.co/4GoESW6 -1:38 PM Jul 25th, 2011

yottaa Have you used Google’s Page Speed? Join #WPOchat 3pm ET today with @bryanmcquade @jmarantz of Googlehttp://t.co/NdqpPqJ #webdev -1:38 PM Jul 25th, 2011

bbrewer RT @wpo_chat: TODAY! 3pm ET Join #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/uhPc3Ak #webperf -1:38 PM Jul 25th, 2011

bluesmoon RT @wpo_chat: 90 Minutes to the 4th Monthly#WPOchat Join @bryanmcquade @jmarantz and Website Performance Experts to talk Speed http://t.co/uhPc3Ak -1:28 PM Jul 25th, 2011

wpo_chat 90 Minutes to the 4th Monthly #WPOchat Join@bryanmcquade @jmarantz and Website Performance Experts to talk Speed http://t.co/uhPc3Ak -1:26 PM Jul 25th, 2011

utollwi TODAY! 3pm ET #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/2jLhjQV #google #pagespeed #webdev -9:34 AM Jul 25th, 2011

yottaa RT @wpo_chat: TODAY! 3pm ET Join #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/uhPc3Ak #webperf -9:31 AM Jul 25th, 2011

derSchepp RT @wpo_chat: TODAY! 3pm ET Join #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/uhPc3Ak #webperf -8:51 AM Jul 25th, 2011

wpo_chat TODAY! 3pm ET Join #WPOchat Twitter chat about Web performance @bryanmcquade @jmarantz moderatehttp://t.co/uhPc3Ak #webperf -8:50 AM Jul 25th, 2011

jonathanklein RT @yottaa: Interested in Google Page Speed? Join moderators: @bryanmcquade @jmarantz for #WPOchat Monday 3pm ET: http://t.co/XzAIdjQ #webdev -9:58 PM Jul 24th, 2011