uWestFest 2016

Slides from uWestFest 2016 in San Diego for Umbraco and the Need for Speed.

Transcript

1. Umbraco and the Need for Speed uWestFest 2016 – San Diego, CA
2. Matt Shull Director of Labs Aristotle Interactive aristotle.net aristotleinteractive.com mattshull.com @themattshull mshull@aristotleweb.com
3. mattshull.com/umbraco
4. Why Performance Matters First and foremost, we believe that speed is more than a feature. Speed is the most important feature. -Fred Wilson
5. Why Performance Matters
6. Why Performance Matters
7. Why Performance Matters Up to 40% of users will abandon a request and possibly never return, if it doesn’t load within 3 seconds. -Gomez http://www.mcrinc.com/Documents/Newsletters/201110_why_web_performance_matters.pdf
9. Why Performance Matters Walmart saw up to a 2% increase in conversions for every 1 second of improvement in load time. Every 100ms improvement also resulted in up to a 1% increase in revenue. https://wpostats.com/2015/11/04/walmart-revenue.html
10. Why Performance Matters The Aberdeen Group discovered a 1- second delay resulted in 11% fewer page views, a 16% decrease in customer satisfaction, and 7% loss in conversions. https://wpostats.com/2015/10/29/aberdeen-1-percent.html
11. Why Performance Matters Mozilla cut load time by 2.2 seconds and saw download conversions increase by 15.4% https://wpostats.com/2015/10/29/mozilla-2point2.html
12. Total Load Time
13. Time to First Byte TTFB measures the duration from the user or client making an HTTP request to the first byte of the page being received by the client's browser.
17. Time to First Byte •  Rendering of server side code –  API calls –  Slow SQL queries •  Connection to the server –  Memory leaks –  Poor server resources
18. Speed Index Speed Index is the average time at which visible parts of the page are displayed. It is expressed in milliseconds and dependent on size of the view port.
19. Page Size Page size measures the number of kilobytes the site downloads to the user’s device.
20. The Good Stuff
21. Images ~63% http://httparchive.org/interesting.php
22. Image File Types WebP •  Uses transparency •  Animation •  Photographs •  50%-75% smaller •  Android and Chrome
23. Image File Types
24. Image File Types JPEG2000 •  Uses transparency •  Photographs •  Sometimes smaller
25. Image File Types
26. Responsive Images
27. Responsive Images          <picture>                  <source  srcset=“./large.webp”  type=“image/webp”  media=“(min-­‐width:  800px)”>                  <source  srcset=“./large.jpf”  type=“image/jpf”  media=“(min-­‐width:  800px)”>                  <source  srcset=“./large.jpg”  type=“image/jpg”  media=“(min-­‐width:  800px)”>                  <source  srcset=“./small.webp”  type=“image/webp”  media=“(max-­‐width:  799px)”>                  <source  srcset=“./small.jpf”  type=“image/jpf”  media=“(max-­‐width:  799px)”>                  <source  srcset=“./small.jpg”  type=“image/jpg”  media=“(max-­‐width:  799px)”>                  <img  srcset=“./large.jpg”  alt=“…”>          </picture>      
28. Responsive Images https://github.com/scottjehl/picturefill
29. Responsive Images https://modernizr.com/          .webp  .container  {    background-­‐image:  url(‘image.webp’);          }            .no-­‐webp  .container  {    background-­‐image:  url(‘image.jpeg’);          }    
30. CSS ~3.5% http://httparchive.org/interesting.php
31. CSS •  Minify files •  Split into 3 files – Above the fold main page – Below the fold main page – Interior •  Use LoadCSS to load in below the fold css – Use <noscript> as a fallback
32. Fonts ~5.5% http://httparchive.org/interesting.php
33. Fonts •  Reduce font weights •  Strip out characters not needed using Font Squirrel •  Use default fonts if possible
34. Fonts •  Font loading event built into browsers soon •  Use current tools for best browser support – Font face observer – Google Web Font Loader – LoadCSS •  Decide whether you want FOIT (Flash of Invisible Text) or FOUT (Flash of Unstyled Text)
35. Javascript ~16% http://httparchive.org/interesting.php
36. Javascript •  Minify files •  Use HTML/CSS alternatives – Image rotators – Tabs – Responsive Navigation •  Split into mainpage.js and interior.js
37. Javascript
38. Javascript                  <html>    <head>            <script  src=“google-­‐analyNcs.js”>    </head>    <body>            //content            <script  defer=“defer”  src=“jquery.js”>            <script  defer=“defer”  src=mp.js”>    </body>          </html>    
39. Javascript: Lessons Learned •  Umbraco Forms •  AJAX all the things!
40. Browser Hints •  DNS Prefetch •  Preconnect •  Prefetch •  Prerender
41. Browser Hints: Prefetch •  Download and cache specific files once the browser is idle.   <link  rel=”prefetch"  href=”bQ.min.css">    
42. Browser Hints: Prerender •  Download and cache an entire page   <link  rel=“prerender”  href=“hRp://maRshull.com/umbraco”>    
43. https://www.youtube.com/watch?v=_Jn93FDx9oI
44. Measuring Performance
45. Measuring Performance •  RUM – Real User Data – Measured using browser APIs •  Synthetic – Simulated User Testing – Simulated using real devices and browsers
46. Median vs Average
47. Measuring Performance: RUM •  Navigation Timing API •  Resource Timing API •  User Timing API
49. Navigation Timing API •  Backend Time = responseEnd – requestStart •  Time to First Byte = responseStart – connectEnd •  Frontend Time = now – domLoading •  Total Time = now – navigationStart
50. Navigation Timing API
51. Resource Timing API •  Measure the performance of each resource being downloaded by the user. •  TTFB = responseStart – startTime •  DNS Lookup = domainLookupEnd – domain LookupStart •  TCP = connectEnd – connectStart
52. Resource Timing API
53. User Timing API •  Measure performance of web applications with high precision timing. •  mark() •  measure()
54. User Timing API          window.performance.mark(‘start_req’);            $.get(‘./example.json’,  funcNon(data)  {    //do  something  with  data    window.performance.mark(‘end_req’);      window.performance.measure(‘measure_req’,  ‘start_req’,  ‘end_req’);          });    
55. User Timing API          window.performance.getEntriesByName(‘start_req’);            window.performance.getEntriesByName(‘end_req’);            window.performance.getEntriesByName(‘measure_req’);    
56. User Timing API
57. Measuring Performance: Synthetic •  WebPageTest.org •  Soasta •  Speed Curve
58. Beware of False Performance Prophets •  Google AMP •  Facebook Instant Articles •  Apple News
59. Creating a Culture of Performance •  Has to come from the top down – Show the impact performance has on business – Use video to show you vs competitor •  Create a Performance Budget / Specification •  Recognize developers and designers great work
60. Performance Budget •  HTML: 5% •  CSS: 10% •  Javascript: 10% •  Images: 65% •  Fonts: 5% •  Other: 5% •  Page Size Goal: 1500 kb (+/- 500 kb)
61. Performance Awards
62. What’s Next? •  Javascript API for detecting connection speed •  Measuring speed index in RUM •  Changes to <link> stylesheets
63. We’re Just Scratching the Surface •  Designing for Performance by Lara Hogan •  Follow Tammy Everts on Twitter and Blog •  Follow Steve Souders Twitter and Blog •  More resources at mattshull.com/umbraco
64. Thank you! mattshull.com/umbraco aristotleinteractive.com