Faster websites convert more users to customers. Loading times over 4 seconds cause 75% of users to not return. Perceived performance affects user happiness - sites loading over 10 seconds are considered "f-ing slow". Tools like Firebug and Webpagetest help identify front-end issues like unnecessary assets. Munin and Cloudkick help monitor server load and identify back-end bottlenecks. Common fixes include adding caching, using a content delivery network, upgrading hardware, or refactoring code. The goal is chasing performance to improve the user experience.

1. Turning your web performance to 11 Newman Scott Hunter http://driftlogic.net - @nshunter – scott@driftlogic.net

3. Faster websites make more money.

4. Source: http://www.slideshare.net/bitcurrent/impact-of-web-latency-on-conversion-rates

5. Loading Times @ 4 Seconds, 75% of users will not choose to return to the site. Source: http://www.eugeneloj.com/2006/12/the_user_attent.html

6. Perception of Performance User Happyness Time @ 100 ms “Okay, I did something.” . . . @ 1000 ms “Okay, I’m waiting for it to load” @ 10000 ms “This site is F-ing SLOW.” Source: http://www.useit.com/papers/responsetime.html

7. Do I have a problem?

8. Assessing Performance Firebug

10. Assessing Performance http://webpagetest.org

13. Site’s Slow Problem?

15. CSS / Javascript / HTML

16. Flash / Video / Rich Media

18. Database

19. Caching

21. Video

22. Flash

23. Multiple Images

24. AJAX / Extraneous JSKongregate Front Page: 1.2 MB VS Kongregate Game Page: 5.3 MB

25. Front End Issues http://developer.yahoo.com/yslow/ http://code.google.com/speed/page-speed/

28. Apache Header Fix

29. Back End Problems

30. How do I know if I’m overloaded?

31. Overloaded Server

32. Munin Network Monitoring

33. Monitoring Services Open Source Free! http://munin-monitoring.org/ Not Free! But Awesome. http://cloudkick.com

34. How do I FIND my problem / bottleneck ?

35. Application Layer Monitoring

37. Switch from Cloud to Physical

38. Integrate a CDN

40. Fixing Problems Problem Slow Search / Large Search Dataset Solution Use a Search Appliance

41. Fixing Problems Problem Code Efficiency / Application Size / Language Issues Solution Code Refactoring Change Runtime Environment / Application Server Rewrite

42. Chasing the Unicorn

43. Thank You Newman Scott Hunter http://driftlogic.net - @nshunter – scott @driftlogic.net