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Scalability vs. Performance


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Creating scalable web sites that can handle many simultaneous requests and still provide fast experience for each user is hard. Historically, the industry was not differentiating Scalability and Performance, but with emergence of front-end engineering, new field of Web Performance Optimization was born and it became critical to approach them separately. Sergey Chernyshev will compare these two directions of web engineering and describe the differences between them, he will also cover current performance trends and describe different approaches to take in order to measure and analyze Web Performance in comparison to traditional methods that are successfully used to test scalability of web systems.

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Scalability vs. Performance

  1. 1. Size & Speed Scalability vs. PerformanceNY Web Performance Meetup March 27, 2013
  2. 2. About• Doing web dev and operations since 1996• Tech Director, Web Ops and Dev @ truTV/Turner• Creator of ShowSlow• Organizer at NY WebPerf• Board member of WPO Foundation
  3. 3. Why Do We Scale?
  4. 4. Available Resources CPU Memory Disk Network
  5. 5. CPU & Memory• Classical scale problem• Scale up (Moors law)• Scale out (cloud)
  6. 6. Storage• More available• Speed and reliability• Slower then in the past / SSD
  7. 7. Network ???• Easy to scale for static assets• Trouble if you hit dynamic
  8. 8. User Experience
  9. 9. How Page Loads~8 sec above the fold~0.5 sec for first requestonly 6.25% on back end12sec, 157 req, ~1Mb
  10. 10. Our Tools
  11. 11. Load Testing apply load, measure backendperformance degradation
  12. 12. "Synthetic" testingtime ALL components of page load HAR
  13. 13. Real User Measurementmeasure key performance metrics for REAL users Boomerang.js
  14. 14. Speed, is it important? RUM data. Aaron Kulick, Cliff Crocker @ Wallmart Labs
  15. 15. Speed, it is important! RUM data. Aaron Kulick, Cliff Crocker @ Wallmart Labs
  16. 16. Speed it upfor one user!
  17. 17. New York Web Performance MeetupSergey Chernyshev @sergeyche @perfplanet