Design + PerformanceSteve Souders@soudershttps://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

bringing designers & developers closer togetherThis talk is about creating better websites by bringing designers & developers closer together

flickr.com/photos/timdorrPerhaps 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 sides win is the other sides 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

flickr.com/photos/easyflowBut really, theyre both after the same thing: creating a great user experience!Design & development ARE connected, but theyre 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 cant be here today.

https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budgetSo Im going to borrow from Yemeni Perez-Cruz to represent designers.

https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget

https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budget

https://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budgettwo minutes is slow

http://en.oreilly.com/velocity2009/public/schedule/detail/8523but we know good performance is key to great user experiences

http://kylerush.net/blog/meet-the-obama-campaigns-250-million-fundraising-platform/We made the new platform 60% faster and this resulted in a 14% increase in donation conversions.but we know good performance is key to great user experiences

To stay in Google's good graces, websites must be designed so they load quickly on mobile devices.and now Google is even demanding that your websites be quick if you dont want to get demoted in their search results

designers & developers often work in silossome designs are hard to make fastbeing fast is importantflickr.com/photos/jronaldleeso 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

Design + Performanceflickr.com/photos/easyflowIt is possible to bring design and performance closer together. Heres 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

small interdisciplinary teamsNone of this works unless you have the right people in the room the whole way through the process.Its hard to create this relationship halfway through the process bring designers & developers together from the get go

guiding principlesflickr.com/photos/nihaogirlWith 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-6RAgsLSpeed 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/TBWAHere 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. 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/TBWAHere 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.

prototype earlyIt 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.

measure performance from the startflickr.com/photos/josterpiBut 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

performance budgets

https://speakerdeck.com/lara/mobile-web-at-etsyin-page remindersshow whats beaconedbookmarkletsBut what exactly should we be measuring?

window.onload is not the best metric for measuring website speedWe know page load time is NOT necessarily correlate to UX.

99% ATF rendered: 2.0sonload: 9.7sonload: 3.9s98% ATF rendered: 4.7s

overly optimistictoo criticalexamples 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/

flickr.com/photos/goincaseWe need metrics that more accurately measure the UX. They wont be perfect until human brains fire JavaScript events.

https://www.flickr.com/photos/goincase/2220266628/in/photolist-4ocrV7-9VVXjZ-8fy57p-9VXuKx-feNNWa-ff47y9-feNNTF-nLarQF-9VW2PP-9VYLNQ-9W1j4A-nJm5dy-9VYN9m-9VRLJ4-8hYyha-9VYV3J-GnW5B-zyZxy-oagedz-9tDdWs-eizvPP-bqgVNX-9VYoh3-9VVxfr-9VW2fT-8c4wFn-9VVZXv-8hYt5H-8hYAMX-c2Ygh-jsLvXT-jsMYFD-84vT4z-8twLz9-jsNznU-8pghjG-7BGCEF-8P8gMg-8PbmJq-8Pbmww-993hrU-6jcP8W-6j8C1g-6jcMT5-6j8AEM-6j8Amc-6j8zUr-zyZuG-9VXtkD-as27uZ

https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index

flickr.com/photos/cataniamicheleWe need metrics that focus on what the user sees!https://www.flickr.com/photos/cataniamichele/2855661699/sizes/l

filmstrips

videohttp://www.webpagetest.org/video/view.php?id=150420_9bb3d86cb90fb18f21a7b2774376bd30fd6e1494

imageflickr.com/photos/jdhancockhttps://www.flickr.com/photos/jdhancock/6914454974/in/photolist-bx1oyW-eQ2yW7-pzmzPt-7MxBji-55bVS4-K7aC4-7zQ7Zc-4UAU46-2L3o3p-4uaqEp-gJZZHV-gT4rL1-fnUT4L-7ZFGpo-8nDkwY-eNZABc-7Ju3kR-nA2Zo5-6qK9Pd-5jUj2d-6US1t7-y7oKf-99242N-X8kWK-c8qGT9-orsEqG-pLehqa-KLgnS-5muu7K-7ZbcmB-nDXaLB-faV6HG-djULw7-5GTAz9-4pZyVc-a6SiAT-f9tdxa-mLNHtP-7nNAXZ-r71HXM-9Jp7xV-6e7U5U-ddUsEV-b6LNha-8t5gPc-f9tcYa-c1nFpf-6HLPUn-a3FXZG-gMPpHU

Hero Image Delay (HID)It's the price we pay to download huge images, right?????

540 ms647 ms}}hero

NO! Hero images are typically download quickly but are delayed by JS & CSS."sweater" image finishes downloading at 2057.500 ms before hero is renderedhttps://speedcurve.com/test/150427_9S_16/hja21ghdsja6743ghjfdskjhs2133j/

Hero Image Delay (HID)

2079 ms}hero

"Evening" image finishes downloading at 618ms.2697 ms before hero is renderedhttps://speedcurve.com/test/150427_YF_132/hja21ghdsja6743ghjfdskjhs2133j/

Hero Image Delay (HID)

685 ms}hero

"paris" bed image finishes downloading at 712 ms.~700 ms before hero is renderedsync scripts at bottom get promotedhttps://speedcurve.com/test/150427_6A_PR/hja21ghdsja6743ghjfdskjhs2133j/

Airbnb.init();

when do scripts at the bottom get loaded?Notice these are BLOCKING scripts!

238K238K gzipped238K gzipped797K UNgzipped!hero685 ms}

The rule "put scripts at the bottom" stopped mattering with IE8.

"paris" bed image finishes downloading at 712 ms.~700 ms before hero is renderedsync scripts at bottom get promotedhttps://speedcurve.com/test/150427_6A_PR/custom metricsdefine most important elements on the pagemeasure using User Timingtrack with RUM and syntheticin terms of UX - but also for the business (ads)

https://blog.twitter.com/2012/improving-performance-on-twittercom

actual image display: ~5200 mshttp://www.webpagetest.org/video/compare.php?tests=150422_H8_AG3-r%3A4-c%3A0&thumbSize=200&ival=100&end=visual

How do we know when the image rendered? Filmstrips!!

actual image display: ~5200 msperformance .getEntriesByName("hero.jpg")[0] .duration

too earlyIt's not wrong, it's just answering a different question: "When did it finish downloading?"

actual image display: ~5200 ms

too early

actual image display: ~5200 msvar observer = new MutationObserver(obsCallback);observer.observe(document, { childList: true, attributes: true, subtree: true });

too early

actual image display: ~5200 msfunction imagePolling() { var hero = document.getElementById('hero'); if ( hero.offsetHeight ) { performance.mark('hero'); } else { setTimeout(imagePolling, 100); }}

too early

actual image display: ~5200 ms

performance.mark("hero");

The only that works!

Those previous tests covered other slow (blocking) assets. What if the image itself is slow?max(image onload, inline script)

performance.mark("hero2");

when is image displayed?HERO^

custom metrics

custom metricsAll Ads Rendered

digitaljournal.comAnd this brings us back to where we started - defining (and measuring) what matters most to the UX. Because thats what unites the entire team - creating a fantastic UX - which also means a FAST UX.

http://www.digitaljournal.com/img/1/8/1/6/4/9/i/1/3/8/o/P1100045.JPG

identify what matters mostfocus on UX performancedefine custom metrics!flickr.com/photos/myklroventinetakeawaysflickr.com/photos/myklroventine/4062102754/

@soudershttp://stevesouders.com/talks"thank you" by nj dodge: http://flickr.com/photos/nj_dodge/187190601/Verrazano-Narrows Bridgehttps://speakerdeck.com/yeseniaperezcruz/design-decisions-through-the-lens-of-a-performance-budgethttp://larahogan.me/design/http://www.amazon.com/Designing-Performance-Weighing-Aesthetics-Speed/dp/1491902515https://www.youtube.com/watch?v=DFImM0r4EpEhttp://www.slideshare.net/bluesmoon/beyond-page-level-metricshttp://bradfrost.com/blog/post/performance-as-design/