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Broadening Our Perspective On Web Performance


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The state of Web performance analysis, testing and monitoring today relies on the industry practice of clean-room, synthetic measurements from high-speed backbone or DSL-speed end-points in locations all over the world. Next generation Operations teams are broadening their perspective on web performance monitoring – by expanding their measurement technologies from the network to the browser. Learn how you can use the open standard Web Timing API to frame your performance timings in the context of measuring the user experience. Reshape how Operations teams analyze and communicate the performance metrics of today’s web applications and sites, with a strong operational focus on performance timings, baselines, and actionable alerts.

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Broadening Our Perspective On Web Performance

  1. 1. Broadening OurPerspective on Web PerformanceFrom Network Latency to User Experience TimingsVik Chaudhary, EVP Products and Corpdev @vikchaudhary
  2. 2. The state of web performance today
  3. 3. …is that Operations teams rely on clean-room measurements
  4. 4. Using geographically distributed measurement agents
  5. 5. …managed by commercial measurement companies and free services
  6. 6. …using reliable network connections on the Internet backbone and at last mile locations
  7. 7. …to run synthetic (“active”) tests on web pages from multiple locations
  8. 8. …and measure response time and availability for a page or transaction
  9. 9. It’s time to step up our game
  10. 10. Next generation Operations teams…
  11. 11. …are broadening their perspective on web performance monitoring
  12. 12. …and measuring the user experience, not just the network latency2,500 msec 3 secs
  13. 13. The questions being asked today…
  14. 14. …are not: “What is the network latency of all resources on a page?”
  15. 15. Instead “When does the user actually see something other than a blank browser?”
  16. 16. August 16, 2012“How long until the page loads above the fold on a user’s browser?”
  17. 17. “How long before users can click a link, scroll the bar, or swipe the page?”
  18. 18. “What is the elapsed time for a page, including browser execution time?”
  19. 19. User Experience Metrics Time Time Time to Userto First to Full Interactive Experience Paint Screen Page Time
  20. 20. How do websites across industries rate?
  21. 21. Time to Time to User Experience First Paint Interactive Page Time RetailSocial Networks News 0 1s 2s 3s 4s 5s
  22. 22. Time to Time to User Experience First Paint Interactive Page Time Travel Gaming Social RetailEntertainment 0 1s 2s 3s 4s 5s
  23. 23. Time to First Paint is over 1s on average
  24. 24. Wait a Second
  25. 25. No, that’s too long
  26. 26. That’s 4 blinks of your eye
  27. 27. How do you measureuser experience for your website?
  28. 28. Your browser is talking to you
  29. 29. …in a language called Web Timings
  30. 30. Web (Navigation) Timing Attributes
  31. 31. You could program it on your website…function onLoad() { var now = new Date().getTime(); var perceived_latency = now - performance.timing.navigationStart;}
  32. 32. Call Four Different APIs…Navigation PerformanceTiming API Timeline API Resource User Timing API Timing API
  33. 33. …handle storage, compliance, and reporting
  34. 34. Or, let Google give you real user performance statistics
  35. 35. Keynote delivers the industry’s first clean-room user experience monitoring data
  36. 36. Combining Clean Room andReal User Measurements
  37. 37. Web Performance. Reimagined.