Recommended
More Related Content
What's hot
What's hot (20)
Viewers also liked
Viewers also liked (8)
Similar to Design+Performance
Similar to Design+Performance (20)
More from Steve Souders
More from Steve Souders (11)
Recently uploaded
Recently uploaded (20)
Design+Performance
- 1. Design + Performance Steve Souders @souders
- 2. bringing designers & developers closer together
- 5. https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget
- 6. https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget
- 7. https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget
- 8. https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget
- 11. …shaved 2.2 seconds off the average page load time and increased download conversions by 15.4%! blog.mozilla.com/metrics/category/website-optimization/
- 12. We made the new platform 60% faster and this resulted in a 14% increase in donation conversions. kylerush.net/blog/meet-the-obama-campaigns-250-million-fundraising-platform/
- 13. blog.mozilla.com/metrics/category/website-optimization/ …shaved 2.2 seconds off the average page load time and increased download conversions by 15.4%! en.oreilly.com/velocity2009/public/schedule/detail/7709
- 16. “traffic jumped from 6M to 11M uniques… time spent on site rose from 5.9 to 7.8 minutes… interaction rate on ads rose 108%”
- 17. Screen shot of blog post…we've decided to take site speed into account in our search rankings. googlewebmastercentral.blogspot.com/2010/04/using-site-speed-in-web-search-ranking.html
- 18. “To stay in Google's good graces, websites must be designed so they load quickly on mobile devices.” huffingtonpost.com/2015/04/17/google-search-update_n_7085642.html
- 20. designers & developers often work in silos some designs are hard to make fast being fast is important flickr.com/photos/jronaldlee
- 24. Speed is more important than design embellishment. People are filling small gaps in their day with news. It must load fast on all touchpoints. The design should feel light and nimble, always fresh and up to date. Never heavy, slow to load or clogged up with content. Users expect sites to render in under 2 seconds. DAN/TBWA
- 25. prototype early
- 26. measure performance from the start flickr.com/photos/josterpi
- 28. https://speakerdeck.com/lara/mobile-web-at-etsy in-page reminders show what’s beaconed bookmarklets
- 31. "The graph below shows the average number of seconds it takes 35 different computers located throughout the world to download our homepage."
- 33. window.onload RUM • metrics from real users - COOL! • reflect actual geo, hw, bw, etc. • but, "start" time isn't right • and timer has latency
- 35. Navigation Timing overall page metrics performance.timing,.now() Resource Timing individual HTTP requests performance.getEntries() User Timing custom metrics performance.mark(),.measure() W3C Web Timing Specs flickr.com/photos/zamboniandrea
- 36. “window.onload is not the best metric for measuring website speed”
- 37. 99% ATF rendered: 2.0s onload: 9.7s onload: 3.9s 98% ATF rendered: 4.7s overly optimistic too critical
- 39. domInteractive
- 40. domInteractive
- 43. domInteractive .onload Speed Index Bing Disqus CNN MSN
- 44. There is no single metric that captures the UX on all websites. flickr.com/photos/packethunter
- 47. custom metrics
- 48. custom metrics define most important elements on the page
- 49. custom metrics define most important elements on the page measure using User Timing
- 50. custom metrics define most important elements on the page measure using User Timing track with RUM and synthetic
- 53. image load time custom metric <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt=""> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 54. image load time custom metric <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt=""> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 55. image load time custom metric <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt="" onload="performance.measure('imgDisplayed')"> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 56. image load time custom metric <link rel="stylesheet" href="/huge-slow.css"> <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt="" onload="performance.measure('imgDisplayed')"> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 57. image load time custom metric <link rel="stylesheet" href="/huge-slow.css"> <script> performance.measure('imgDisplayed'); </script> <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt="" onload="performance.measure('imgDisplayed')"> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 58. image load time custom metric <link rel="stylesheet" href="/huge-slow.css"> <script> performance.measure('imgDisplayed'); </script> <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt="" onload="performance.measure('imgDisplayed')"> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 59. image load time custom metric <link rel="stylesheet" href="/huge-slow.css"> <script> performance.clearMeasures('imgDisplayed'); performance.measure('imgDisplayed'); </script> <div class="stream-item-header"> <a class="account-group js-account-group js-action-profile js- user-profile-link js-nav" href="/ericlaw" data-user-id="5725652"> <img class="avatar js-action-profile-avatar" src="https://pbs.twimg.com/profile_images/...d8a_bigger.jpeg" alt="" onload="performance.clearMeasures('imgDisplayed'); performance.measure('imgDisplayed')"> <strong class="fullname js-action-profile-name show-popup- with-id" data-aria-label-part> Eric Lawrence </strong>
- 61. custom metrics
- 64. There is no single metric that captures the UX on all websites. flickr.com/photos/packethunter
- 65. custom metrics define most important elements on the page measure using User Timing track with RUM and synthetic
Editor's Notes
- Very excited about our next speaker and incredibly honored to have the opportunity to introduce him. He and I are actually very much alike in many ways. We both care a lot about web performance and helping the devops community. I think I'm a better coder. And I will say his jokes aren't as funny as he thinks they are. Nevertheless, I'm such a big fan I've been to every talk he's ever given. https://www.flickr.com/photos/easyflow/3377137372/in/photolist-69qHhq-5JUiYP-55ZfsE-dYmwEQ-5Ca1VD-7zq7En-kVv8dK-mqM9Jp-5J3uv9-f4JB8M-qZznd-f4MRgN-f4xAET-bpDYeX-GroML-7qoFXr-55nSfk-rbJwH-6RFZt1-6qnVXy-jtkLG-cEGq9-4xp87D-eeUgzz-c7QHf-6qk9JT-7PjaWF-4gf1tv-7sK9B3-4VtxzW-6qvWgT-8UB4U-8t9NNr-bDvQY-972WQq-6Fkgen-4RSnyY-8T7px8-6rWXPz-6rWU3n-5fgGGe-Hq1J7-cvqi-7Hs86U-9Vo8SK-gzpzde-666Ch9-4CzyT6-3hx5nr-dReBgT
- Steve This talk is about creating better websites by bringing designers & developers closer together
- Steve Perhaps your experience with bringing designers & developers is a bit like this - but without the pillows. Certainly, navigating between design and implementation often feels like a fixed sum game. One side’s win is the other side’s loss. https://www.flickr.com/photos/timdorr/4396870234/in/photolist-7Gx7ku-7GtaDx-7Gx4Ub-7Gta8t-7GtadX-7GvYZ1-3nArNu-3nArUy-3nApNY-3nvYmr-3nAq8N-3nApG1-3nAq2q-3nvYJg-3nw1xc-3nAtnq-3nvVBg-3nAtad-3nAtUo-3nw1jX-3nvZti-3nvXm6-3nAr7d-3nAqfL-3nAuPb-3nAsRf-3nAssL-3nvZHt-3nAroy-3nArvb-3nAqUE-3nAph1-3nvXf4-3nArGG-3nvVb8-3nAscS-3nAtAW-3nAueq-3nvYwD-3nArZN-3nAr27-3nAqs5-oM1oiq-bCU3k4-3sZr4-682gYi-6eDdv3-qSGcRS-aFFtxX-7QzWQc
- Mark But really, they’re both after the same thing: creating a great user experience! Design & development ARE connected, but they’re more like the yin and the yang. They aren't opposing forces, but instead complement each other. Users want an experience that is rich and fast. The trick is figuring out how to deliver that. Similar to DevOps from Velocity. https://www.flickr.com/photos/easyflow/3377137372/in/photolist-69qHhq-5JUiYP-55ZfsE-dYmwEQ-5Ca1VD-7zq7En-kVv8dK-mqM9Jp-5J3uv9-f4JB8M-qZznd-f4MRgN-f4xAET-bpDYeX-GroML-7qoFXr-55nSfk-rbJwH-6RFZt1-6qnVXy-jtkLG-cEGq9-4xp87D-eeUgzz-c7QHf-6qk9JT-7PjaWF-4gf1tv-7sK9B3-4VtxzW-6qvWgT-8UB4U-8t9NNr-bDvQY-972WQq-6Fkgen-4RSnyY-8T7px8-6rWXPz-6rWU3n-5fgGGe-Hq1J7-cvqi-7Hs86U-9Vo8SK-gzpzde-666Ch9-4CzyT6-3hx5nr-dReBgT
- A lot of the thinking behind Design+Performance came from long discussions with my business partner Mark Zeman. He has a lengthy career as a designer and creative director, but sadly can’t be here today.
- Mark So I’m going to borrow from Yemeni Perez-Cruz to represent designers.
- Mark
- Mark
- Mark two minutes is slow
- Steve but we know good performance is key to great user experiences
- “if we’re able to achieve a similar performance boost across our other top landing pages, we’ll drive in excess of 60 million yearly Firefox downloads.”
- This was a ~5 second speed up.
- Time measurements from real users.
- Steve and now Google is even demanding that your websites be quick if you don’t want to get demoted in their search results
- HOW CAN WE CREATE FAST WEBAPPS?
- BOTH so where are we? https://www.flickr.com/photos/jronaldlee/5775587577/in/photolist-9NnoYa-nYYp6g-63bGJj-KrzjB-6nYgX1-8KY39y-kz3M7y-fo68C6-5onBza-apBT72-6g9eSA-9WNvKw-4Gb2FP-2V7jsj-6G7Ynq-2tbdKU-9Kip9s-4TL5Sc-iJQYR-gi6ri6-pfx24Z-BgDwR-9NgMy1-of8g8U-49queL-atRJTH-ax64Nq-fSUV1Q-4qvBPj-4Se4NE-aegPJ4-ptxVJE-ptM5zP-ptMNBV-q95ZVa-kcfpje-mPZDqk-7FPG6G-cqvvXs-rwFCJA-bVYoNj-6McJox-CXYYb-5bMxiG-49mrhe-6q5uNW-7DpdiH-6MgWby-5n89ro-dVXS9w
- Mark It is possible to bring design and performance closer together. Here’s how… https://www.flickr.com/photos/easyflow/3377137372/in/photolist-69qHhq-5JUiYP-55ZfsE-dYmwEQ-5Ca1VD-7zq7En-kVv8dK-mqM9Jp-5J3uv9-f4JB8M-qZznd-f4MRgN-f4xAET-bpDYeX-GroML-7qoFXr-55nSfk-rbJwH-6RFZt1-6qnVXy-jtkLG-cEGq9-4xp87D-eeUgzz-c7QHf-6qk9JT-7PjaWF-4gf1tv-7sK9B3-4VtxzW-6qvWgT-8UB4U-8t9NNr-bDvQY-972WQq-6Fkgen-4RSnyY-8T7px8-6rWXPz-6rWU3n-5fgGGe-Hq1J7-cvqi-7Hs86U-9Vo8SK-gzpzde-666Ch9-4CzyT6-3hx5nr-dReBgT
- Mark None of this works unless you have the right people in the room the whole way through the process. It’s hard to create this relationship halfway through the process bring designers & developers together from the get go
- Mark With everyone gathered together, discuss project goals and capture guiding principles. Make sure performance is addressed. https://www.flickr.com/photos/nihaogirl/4922776916/in/photolist-ndeSfc-51eh43-51a5LR-74FetH-4TeuNB-df5nYf-5Vo2Wn-5Nmjzn-51a5zV-51egkE-51a546-8v1w55-5t8PLi-9Zxguz-7wK1Le-6RAgsL
- Here is an example of a principle from the design of a news website. The research showed that users consume news in small quick chunks and so it was more important that it loaded extremely fast than be visually rich with lots of brand assets. People are waiting at the bus stop and they have less than a minute to scan a few articles on their phone - it has to be fast. There is even a specific mention for when the site should be loaded and that was used as a performance budget.
- Mark Here is an example of a principle from the design of a news website. The research showed that users consume news in small quick chunks and so it was more important that it loaded extremely fast than be visually rich with lots of brand assets. People are waiting at the bus stop and they have less than a minute to scan a few articles on their phone - it has to be fast. There is even a specific mention for when the site should be loaded and that was used as a performance budget.
- Mark It means all the knowledge is in one room, everybody is working on the prototype from day one. Designers are not working in photoshop to create full layouts - they are creating individual assets that go into a prototype. Developers are working with existing data sources and manipulating real content. Researchers are capturing users needs and gauging reactions to each prototype. Team members have a specialisation but are expected to contribute to all aspects of the project. Everybody is contributing to the prototype and the conversions are all embodied in one place. So every one has a shared vision and can see how well the project principles and performance principles are being met. Here's a moment that I love - the client is in the room, the developer is experimenting with changing layout and the designer is consulting on the various options they are playing with. All the discussion revolves around the prototype on screen. And by having a prototype from day one we can immediately assess it's performance and ensure it's delivering the user experience we need. But one of the challenges with performance is that it is invisible. How do we monitor and make visible the performance all the way through the process - for everybody, not just this small interdisciplinary team, but also the wider organisation we need to have conversations with.
- Mark But one of the challenges with performance is that it is invisible. How do we monitor and make visible the performance all the way through the process - for everybody, not just this small interdisciplinary team, but also the wider organisation we need to have conversations with. https://www.flickr.com/photos/josterpi/3174097491/in/photolist-5Qu5AP-h4vYQc-qDkDsE-6tDQ53-ap4pYT-6VrZjk-md5yR5-5PondA-5PVcKC-bvavRn-bxsk7Z-QudsT-6S1ivp-9hwNYa-8UjqcP-ap7amu-9zgR8a-qf1yJ9-qgz457-4JXfm4-99eAKF-6cyvEr-mFUttz-e2FfcF-37ddmA-wBwq6-63iZnr-wBwiC-9XMHpn-ph8ANF-9XQzJE-ZsAKM-iyQpBa-7jgbx4-6QJSTZ-7jk5tw-wBwgS-wBwca-bA44J-8Mdwca-qMZeNs-7P5RjE-6o8M7d-9hP5RB-4zySd-aAqBn3-NGjcd-cH8cQU-8USCg9-8KMjFj
- Mark
- Steve But what exactly should we be measuring?
- WHAT SHOULD WE MEASURE? https://www.flickr.com/photos/lisanorwood/2861328403/in/photolist-5mR4fk-MjCWp-bX7FrJ-dMih5Z-8Sqpe4-qUk5B6-cMqP6L-ej4mk4-bv2Koj-gV3NF9-4LYHJC-4LYHxd-4LUxYa-4LUxKV-4LUxCH-4LYGEw-4LYGvG-4LUxdP-4LUx66-4LUwR8-4LUwCn-4LUwwz-j3LVA-6CMMSn-dcbdKE-tTwVoG-g7Ai1f-p544s2-79Kh94-aNWUrp-CsP1L-e38a5p-e38a4k-CEFSU-9xr1yb-9xqZZu-9MyzJY-3fcqzs-fpTzg2-8qAgFe-ad22ie-7xWK7u-bugShD-683bvG-8vYEtm-696zM4-bunmey-riw5sJ-rixdyo-qD6VvN
- SHORT HISTORY OF HOW PERF METRICS HAVE EVOLVED YtseJam Photography, "Going nowhere fast", http://www.flickr.com/photos/thatguyfromcchs08/2300190277/
- https://www.flickr.com/photos/kk/6863172432/in/photolist-bsty4b-3HDYJE-wiSVMX-eVWzMJ-9ftJBe-kYWQ8F-aucUmh-diNSS9-qZg4Rp-kjFung-dmuJKm-pH4iVp-bnTdAq-9LFXXN-ba67YV-dhth5h-oaaZKo-nd9Fs1-29RVSQ-pJGAjW-i29xbH-ajNXL9-o8WqV6-uqMyAg-fdPuAo-srZ5Yr-nwMJDC-jibyGv-hBcuis-vKiMxj-pu9xhj-rwJSDL-dnDq8k-swkmVC-o151uM-hBbGwi-gfwits-cHtV9-61nXN5-bAZ5za-pU4HhE-kBkvPH-pn47sx-hTFhB9-mnGW1V-o8wD5y-rRvX4y-9B1Qwy-dQuEdE-rDsEGb
- https://www.flickr.com/photos/lissalou66/3230227830/in/photolist-5VrLch-3W7wvR-bDv29P-cWdJ6S-qDbGGp-7mo5YA-7mo68Y-7mjbG2-7mjbED-7mjbFn-7mjbJZ-6ZNsp9-8bKqgd-7dMfu3-7mo6cw-956aRV-fjWyE8-8RC4L7-bWuJvd-7mo67G-4eQWJo-8WVc1Q-fcyQ6L-8RyWpH-u6a2mU-7mjbNi-5WdbpM-diEyhp-nYTWA4-8RC4tY-7mjbCz-7mo5ZJ-pQ3mGH-cLTVs-VGPku-9C9Ewu-k454Yr-rMoPkf-shVXJa-9C9EMq-9C9DEY-9eUvYt-ehVk2b-Fi9WW-yhQ2zU-nBiZxp-66VCJA-66VBqU-iV7iXo-eiC3zb
- https://www.flickr.com/photos/genbug/3211632108/in/photolist-5TNsko-fdbGed-fdbEGA-wrGoL-5Ubbxd-d6PKFm-d6PKgJ-d6PKsq-d6PK1N-5ecJbt-6756uY-5UDjxE-fdbFGJ-fdbFqJ-rjR77Q-r5yA89-rn3Peb-rn1GDa-r3PvC8-qq9vEU-r5yzz5-r5zuS9-rjR62U-rn1FQg-r5yyVE-rn1FvP-qq9uG1-rn1Fmv-r5yyo7-rzJrS9-7xnUEd-4KvHVV-pDB3aD-eNqHUF-hjbY5-6nczkD-p4nDT4-8ZsZmP-dnEGjh-78mPc8-mh4vz-wrGmT-wrGk1-wrGi7-8jX2hk-99v92z-aVkUEg-5qCvSj-jFTHxL-jFTDJy
- https://www.flickr.com/photos/audiinsperation/1388548474/in/photolist-37GF5W-ht7kFp-c3bAr7-5U6Q4i-4w9zHP-dRa7zx-hniwn-9dpVby-8xvDZG-q9xMY7-9xnZWr-93iFPA-9TyEWQ-9TvP8g-oVq1dV-oDczn8-8QynpR-645rW7-bxB1CG-e3ugwb-c928G1-cA7Mrs-e2vNoN-hniwo-hniwp-fdbFWY-7H5QhG-wrGqS-pzvJho-hZ7Y6a-cuFiBm-8MDfSg-5wLUMK-jPAYVo-5w275G-b3g8Vc-arjonn-teWQdu-szHzpa-oe8cUe-oeq5Dn-oefvcj-jVxS1R-EYNJv-hD7JTZ-dLBWgU-b3h3Di-qyvNKi-qNDoh9-9344jJ
- https://www.flickr.com/photos/stevendepolo/5111008851/in/photolist-8MDfSg-5wLUMK-jPAYVo-5w275G-b3g8Vc-arjonn-teWQdu-szHzpa-oe8cUe-oeq5Dn-oefvcj-jVxS1R-EYNJv-hD7JTZ-dLBWgU-b3h3Di-qyvNKi-qNDoh9-9344jJ-2uBZ5H-hD9cR2-ae4sbS-ae1Cur-4mWaLe-bzPBty-ae4rZE-teWPNS-szwXFC-sogkJk-6tm9wo-8UfEsf-jmM4ck-hD7Jqz-heaRsg-cN8m8Q-cN8kjy-cN8jrQ-cN8iEf-cN8hRE-cN8ekj-cN8cTS-cN8bpu-cN8aCw-cN88U9-cN884q-jFQUJP-jFRE54-jFT4MU-5TNsko-fdbGed
- This is just the HTML document!!! Just 1 of 50 requests!!! http://stockcharts.com/commentary/archives/cww20021222h.html This is just the HTML document!!! Just 1 of 50 requests!!! As of 2011 their HTML document took 500 ms
- We need metrics that focus on what the user sees! https://www.flickr.com/photos/cataniamichele/2855661699/sizes/l
- Roundtrip 2003 Episodes 2008 Boomerang 2010
- FOUNDED BY GOOGLE & MICROSOFT
- GAVE US .navigationStart MORE ACCURATE WAY OF MEASURING WINDOW.ONLOAD BUT PAGES ALSO GOT MORE COMPLEX https://www.flickr.com/photos/zamboniandrea/170324255/
- BUT PAGES ALSO GOT MORE COMPLEX We know page load time is NOT necessarily correlate to UX.
- examples of how onload does NOT correlate to UX Amazon: http://www.webpagetest.org/result/150420_GV_E3/ Gmail: http://www.webpagetest.org/result/150420_S9_704a92a60b0b134daec3d42d649c3010/
- IF WE LOOK AT NAV TIMING WE SEE domInteractive
- http://www.webpagetest.org/result/150915_X5_15TY/ 4398
- http://www.webpagetest.org/result/150915_JR_15T8/ 970
- SPEED INDEX IS ONE NUMBER THAT TRIES TO CAPTURE THE WHOLE RENDERING EXPERIENCE
- Steve
- BING: 455 | 451 | 1657 - http://www.webpagetest.org/result/150921_C7_2A4/ disqus: 805 | 2805 | 3413 - http://www.webpagetest.org/result/150921_07_3AK/ CNN: 4143 | 12683 | 4329 - http://www.webpagetest.org/result/150921_RB_1Z9/ MSN: 1813 | 2365 | 1636 - http://www.webpagetest.org/result/150921_5H_24F/ VEL: 1354 | 8258 | 1310 - http://www.webpagetest.org/result/150921_45_23Z/
- BING: 455 | 451 | 1657 - http://www.webpagetest.org/result/150921_C7_2A4/ CNN: 4143 | 12683 | 4329 - http://www.webpagetest.org/result/150921_RB_1Z9/ CNET: 942 | 10740 | 2606 - http://www.webpagetest.org/result/150921_VY_212/ MSN: 1813 | 2365 | 1636 - http://www.webpagetest.org/result/150921_5H_24F/ TMALL 3616 | 8660 | 4726 - http://www.webpagetest.org/result/150921_RF_2K6/ VEL: 1354 | 8258 | 1310 - http://www.webpagetest.org/result/150921_45_23Z/
- slideshare: 787 | 3324 | 3209 - http://www.webpagetest.org/result/150921_GK_35V/ disqus: 805 | 2805 | 3413 - http://www.webpagetest.org/result/150921_07_3AK/
- THESE CANNED METRICS DON'T NECESSARILY CAPTURE THE UX IF YOU'RE USING A METRIC THAT PUTS THE SAME VALUE ON ALL THE CONTENT IN THE VIEWPORT, THAT'S NOT A GOOD METRIC. https://www.flickr.com/photos/packethunter/8606781566/in/photolist-e7y1iC-8Wjrr-6oNLSt-4KFuB3-4MUQMb-71M5Kn-6fNAWB-6fSGR1-6fSPhy-6fNCoV-6fNCN2-6fNCmz-c1ygCh-7Wp7WQ-6fSNWm-6fNCWn-6fNCRv-6fNEVF-6fSGWA-7WkQ9r-ifakh-fLN1RN-qkDua9-poHA73-qkDu1m-qkwJbZ-poHA8W-6fSSeJ-rYNC5M-rnzhum-9PXcX-6pZMty-ckNUdq-ne49L-bLpxWD-8rfW2a-7Pr24Z-6KykJG-64zPz9-6Y4MrR-4cj1Ro-6bbByr-6Y4KWP-22FRv7-6cEwfU-4MVc5m-nu1N9m-n1Beux-9wC6Kj-6Yc7kg https://www.flickr.com/photos/mindahaas/5597392298/in/photolist-9wC6HL-BnjNV-6fNFrZ-6fSPFQ-6fNDEP-6fSMGu-6fSMDJ-8oFeHX-rAYd6m-sgpoM9-sgvPUv-sgpzGf-sxNNb3-sgwvyF-rAYxou-rBaRoK-sgpFPW-svFwuJ-sxYxwr-sxZ68n-sgpo1Q-sgvTYH-sxYwcc-sgo4cs-svFMdS-sgwty8-sxWUGc-sxYmhH-svFz5y-sxNATU-rBb16K-rBaAHx-sxWu1P-sxYuTv-rBaXM6-sxNzBW-sgnXhG-sxP2zh-rBb5kB-4ooSus-6fNEBM-6fNEmt-6fSQGQ-6fSPPC-7Wp5uE-6fSHdG-6fSH17-7WpaSj-6fNCaP-6fNBFH
- Anyone surprised by that? And yet, that’s what most websites are using them to measure their performance. https://www.flickr.com/photos/15609463@N03/14752624612/in/photolist-otD4jL-4p9GRo-ftht9s-ft36pK-fthrfU-ft33tD-fthnJA-fthngq-ft2ZcH-fthkhh-ft2XPD-ft2XmK-fthhH9-ft2Vfv-9UMno7-8tbXHQ-JGdGp-bAnD7e-cY94qm-9Xxwuz-5umsgU-4J4FCc-meHP44-8xVrHW-ft33Wr-ft31aD-5t933c-m6NKfZ-m1fHii-a7BGxp-kXqsW-5KGU2v-y4og12-fthsLu-fthqr5-ft34mg-7zRuBJ-b1nqj4-4GFhqH-66T7qj-kdYcpH-k9fBfA-xi8kRn-a5ZQnK-bhbVMg-58vKE3-kXqqh-8JD5Lb-5MivKh-4gGAGH
- INSTEAD WE NEED METRICS THAT TRACK THE CONTENT THAT'S CRITICAL FOR A GOOD UX https://www.flickr.com/photos/kk/6863172432/in/photolist-bsty4b-3HDYJE-wiSVMX-eVWzMJ-9ftJBe-kYWQ8F-aucUmh-diNSS9-qZg4Rp-kjFung-dmuJKm-pH4iVp-bnTdAq-9LFXXN-ba67YV-dhth5h-oaaZKo-nd9Fs1-29RVSQ-pJGAjW-i29xbH-ajNXL9-o8WqV6-uqMyAg-fdPuAo-srZ5Yr-nwMJDC-jibyGv-hBcuis-vKiMxj-pu9xhj-rwJSDL-dnDq8k-swkmVC-o151uM-hBbGwi-gfwits-cHtV9-61nXN5-bAZ5za-pU4HhE-kBkvPH-pn47sx-hTFhB9-mnGW1V-o8wD5y-rRvX4y-9B1Qwy-dQuEdE-rDsEGb
- not sure copyright: http://www.shareyouressays.com/117259/customs-are-an-important-source-of-hindu-law-essay
- not sure copyright: http://www.shareyouressays.com/117259/customs-are-an-important-source-of-hindu-law-essay
- not sure copyright: http://www.shareyouressays.com/117259/customs-are-an-important-source-of-hindu-law-essay
- not sure copyright: http://www.shareyouressays.com/117259/customs-are-an-important-source-of-hindu-law-essay 15:00
- ONE OF THE FIRST AND MOST POPULAR CUSTOM METRICS
- Steve
- Stylesheets DO block inline scripts from executing. (JS might check styling)
- Stylesheets DO block inline scripts from executing. (JS might check styling)
- Stylesheets DO block inline scripts from executing. (JS might check styling)
- STYLESHEET WILL BLOCK IMAGE FROM RENDERING BUT IMAGE ONLOAD FIRES
- SCRIPT AFTER IMG TAG WON'T EXECUTE UNTIL IMG IS RENDERED Stylesheets DO block inline scripts from executing. (JS might check styling)
- SCRIPT AFTER IMG TAG WON'T EXECUTE UNTIL IMG IS RENDERED Stylesheets DO block inline scripts from executing. (JS might check styling)
- THIS IS A PRETTY BIG DEAL
- Steve http://www.webpagetest.org/video/compare.php?tests=150422_H8_AG3-r%3A4-c%3A0&thumbSize=200&ival=100&end=visual
- Steve How do we know when the image rendered? Filmstrips!!
- Steve too early It's not wrong, it's just answering a different question: "When did it finish downloading?"
- too early
- too early
- too early
- The only that works!
- Those previous tests covered other slow (blocking) assets. What if the image itself is slow?
- NOW WE CAN CAPTURE PERFORMANCE METRICS ON WHAT USERS SEE
- MANY PERFORMANCE METRICS SERVICES AUTOMATICALLY SHOW USER TIMING MARKS & MEASURES
- https://www.flickr.com/photos/stevendepolo/6785825608/in/photolist-9FcnHu-bkD8qU-bxJnMH-bkD8xf-x1T1W-dwVfx9-dwVfpm-agbrmh-dwVfao-dwVfgN-dwVf5E-65CVSx-dwVeJ9-dwVeib-dwVepJ-dwVevQ-dwVeBN-4BdBZc-dwVeRj-dwPKar-5tNxzZ-b2t7Ce-9W4ezj-dgaMD-d9Upc-2U8qSP
- We need metrics that focus on what the user sees! https://www.flickr.com/photos/cataniamichele/2855661699/sizes/l
- Mark
- NONE OF THE CANNED METRICS DO THE JOB GIVE A FALSE SENSE OF SECURITY https://www.flickr.com/photos/packethunter/8606781566/in/photolist-e7y1iC-8Wjrr-6oNLSt-4KFuB3-4MUQMb-71M5Kn-6fNAWB-6fSGR1-6fSPhy-6fNCoV-6fNCN2-6fNCmz-c1ygCh-7Wp7WQ-6fSNWm-6fNCWn-6fNCRv-6fNEVF-6fSGWA-7WkQ9r-ifakh-fLN1RN-qkDua9-poHA73-qkDu1m-qkwJbZ-poHA8W-6fSSeJ-rYNC5M-rnzhum-9PXcX-6pZMty-ckNUdq-ne49L-bLpxWD-8rfW2a-7Pr24Z-6KykJG-64zPz9-6Y4MrR-4cj1Ro-6bbByr-6Y4KWP-22FRv7-6cEwfU-4MVc5m-nu1N9m-n1Beux-9wC6Kj-6Yc7kg https://www.flickr.com/photos/mindahaas/5597392298/in/photolist-9wC6HL-BnjNV-6fNFrZ-6fSPFQ-6fNDEP-6fSMGu-6fSMDJ-8oFeHX-rAYd6m-sgpoM9-sgvPUv-sgpzGf-sxNNb3-sgwvyF-rAYxou-rBaRoK-sgpFPW-svFwuJ-sxYxwr-sxZ68n-sgpo1Q-sgvTYH-sxYwcc-sgo4cs-svFMdS-sgwty8-sxWUGc-sxYmhH-svFz5y-sxNATU-rBb16K-rBaAHx-sxWu1P-sxYuTv-rBaXM6-sxNzBW-sgnXhG-sxP2zh-rBb5kB-4ooSus-6fNEBM-6fNEmt-6fSQGQ-6fSPPC-7Wp5uE-6fSHdG-6fSH17-7WpaSj-6fNCaP-6fNBFH
- not sure copyright: http://www.shareyouressays.com/117259/customs-are-an-important-source-of-hindu-law-essay 15:00
- INSTEAD WE NEED METRICS THAT TRACK THE CONTENT THAT'S CRITICAL FOR A GOOD UX https://www.flickr.com/photos/kk/6863172432/in/photolist-bsty4b-3HDYJE-wiSVMX-eVWzMJ-9ftJBe-kYWQ8F-aucUmh-diNSS9-qZg4Rp-kjFung-dmuJKm-pH4iVp-bnTdAq-9LFXXN-ba67YV-dhth5h-oaaZKo-nd9Fs1-29RVSQ-pJGAjW-i29xbH-ajNXL9-o8WqV6-uqMyAg-fdPuAo-srZ5Yr-nwMJDC-jibyGv-hBcuis-vKiMxj-pu9xhj-rwJSDL-dnDq8k-swkmVC-o151uM-hBbGwi-gfwits-cHtV9-61nXN5-bAZ5za-pU4HhE-kBkvPH-pn47sx-hTFhB9-mnGW1V-o8wD5y-rRvX4y-9B1Qwy-dQuEdE-rDsEGb
- "thank you" by nj dodge: http://flickr.com/photos/nj_dodge/187190601/ Verrazano-Narrows Bridge