1. High Speed Web Sites At Scale Buddy Brewer

2. About Buddy I build web performance monitoring products and help companies make their sites faster From San Francisco Bay Area, California Co-Founder Log-Normal, Inc. http://lognormal.com @bbrewer

3. Does speed matter? How fast is my site? What can I do about it?

4. Does speed matter? How fast is my site? What can I do about it?

6. In 2006, the average online shopper expected a web page to load in 4 seconds. Today, that same shopper expects your page to load in 2 seconds or less. (Forrester Consulting) A 1-second delay in page load time equals 11% fewer page views, a 16% decrease in customer satisfaction, and 7% loss in conversions. (Aberdeen Group) One e-commerce company found that every 100ms delay cost them 1% of sales. (Amazon.com)

7. Does speed matter? How fast is my site? What can I do about it?

8. Synthetic monitoring

10. Visibility into third-party performance

11. Visibility into HTTP headers (caching, compression, etc)

12. Can test parts of your site that aren’t frequented by users

14. Limited coverage of popular browsers

15. Limited insight into mobile devices and connections

16. Sometimes limited geographic coverage

17. Must know in advance what parts of your site you want to analyze

20. You automatically measure the parts of your site that matter to users

21. Total browser coverage (as long as they support Javascript)

22. Works equally well on today’s mobile and desktop web browsers

23. Difficult for third party vendors to game

26. You have to add code to your site

27. User privacy concerns must be navigated

29. Synthetic: WebPageTest (http://www.webpagetest.org)

30. Real user: boomerang.js (http://github.com/yahoo/boomerang)

32. Use the browser cache HTTP 1.0 – Expires: HTTP 1.1 - Cache-Control: max-age Watch out for Etags! Source: http://httparchive.org/interesting.php#max-age

33. Compress, shed weight, limit requests http://httparchive.org/interesting.php#onLoad

35. Consider explicitly testing for Gzip support

36. Google found 15% of browsers that support Gzip don’t say so

37. Optimize images (JPEG metadata, colors/channels, smush.it)

38. CSS sprites, JS minify, combine stylesheets and JS files where possiblehttp://httparchive.org/interesting.php#onLoad

39. Watch out for third parties http://httparchive.org/trends.php#numDomains

40. Consider using a content optimizer

43. Measure your site constantly