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Understanding HTTP & Web Performance
The document discusses web performance, emphasizing the importance of fast loading times and HTTP protocols for user retention. Key metrics include response time expectations and performance optimization techniques such as image compression and code minification. The presentation, led by Luke Dewitt and Mike Rudolph, also highlights the significance of utilizing tools like WebPageTest for evaluating speed indices and encourages interest in job opportunities at their company.
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Understanding HTTP & Web Performance
- 1. Understanding HTTP & WebPerformance COLLIDE HALIFAX - OCTOBER 22, 2015
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- 3. Luke DeWitt WEB TEAM LEAD Mike Rudolph DEFINITELYNOT A COP Who are these guys?
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- 11. JAKOB NIELSEN 1993STUDY Response Times source: http://www.nngroup.com/articles/response-times-3-important-limits/ 0.1second “Instantaneous Reaction” 1second “Uninterrupted Flow of Thought” 10seconds “User’s Attention”
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- 15. 47% 40% 7% KISSMETRICS What a slowsite means… of users expect your site to load in 2 seconds or less of users abandon a site at 3 seconds reduction in conversions for every additional second of load time sources: https://blog.kissmetrics.com/loading-time/, https://blog.kissmetrics.com/speed-is-a-killer/
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- 17. Hypertext Transfer Protocol(HTTP) An application protocol for distributed, collaborative, hypermedia information systems. Transmission Control Protocol (TCP) Enables two hosts to establish a connection and exchange streams of data.
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- 20. – https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index “The SpeedIndex is the average time at which visible parts of the page are displayed. It is expressed in milliseconds and dependent on the size of the view port.”
- 21. Halfway through loadingmy site, how much content is rendered for my user to view?
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- 24. WebPagetest Filmstrip View 3000ms(3 seconds) into page load www.webpagetest.org
- 25. WebPagetest Filmstrip View 7000ms(7 seconds) into page load www.webpagetest.org
- 27. – https://sites.google.com/a/webpagetest.org/docs/using-webpagetest/metrics/speed-index “The SpeedIndex is the average time at which visible parts of the page are displayed. It is expressed in milliseconds and dependent on the size of the view port.”
- 32. Components of an HTTPRequest – Chapter 10. Primer on Web Performance
- 34. Components of an HTTPRequest – Chapter 10. Primer on Web Performance
- 35. TCP Handshake – Chapter2. Building Blocks of TCP
- 37. TCP Handshake – Chapter2. Building Blocks of TCP
- 38. TCP Slow-start – Chapter2. Building Blocks of TCP
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- 53. Render Blocking LOADED IN <head> LOADEDBEFORE </body>
- 54. Minify / Concatenate Fewerrequests Less bandwidth
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- 61. Questions? redspace.com / T(902) 444.3490 FACEBOOK REDspace TWITTER @theREDspace LINKEDIN The REDspace LUKE DEWITT @whatadewitt MIKE RUDOLPH @mikerudolph_
- 62. Thank You! Oh, bythe way, we’re hiring! http://redspace.recruiterbox.com