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Website performance

Website performance. Why invest in improving page loading speed. Bing.com/Live.com. Slower site = revenue drop 1 sec = 2.8% 2 sec = 4.3%. Google. Gets worse with time After-effect. Yahoo!. 0.4 seconds slower = 5-9% drop in full-page traffic. AOL. Slower pages get less traffic.

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Website performance

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  1. Website performance Why invest in improving page loading speed

  2. Bing.com/Live.com Slower site = revenue drop 1 sec = 2.8% 2 sec = 4.3%

  3. Google Gets worse with time After-effect

  4. Yahoo! • 0.4 seconds slower = 5-9% drop in full-page traffic

  5. AOL Slower pages get less traffic

  6. Shopzilla Improving from 6 sec down to 1.2 seconds

  7. Shopzilla • Every little bit counts • Cookie-free components: +0.5% more revenue

  8. Netflix • 43% drop in outbound traffic after enabling compression

  9. Faster site means: • More repeat visits • More page views per visit • Better conversions • More revenue • Increased user satisfaction • Hardware and bandwidth savings • More (sponsored) search engine traffic

  10. Where do we focus?

  11. Example: Ashton Kutcher’s Twitter

  12. First view (empty cache) 10% 90%

  13. Repeat visit (full cache) 38% 62%

  14. Where to focus? • Focus on the front-end • That’s where the time goes • Easier to improve

  15. Thank you!

  16. Credits/URLs • Google, Bing: http://en.oreilly.com/velocity2009/public/schedule/detail/8523 • Shopzilla: http://en.oreilly.com/velocity2009/public/schedule/detail/7709 • Netflix: http://en.oreilly.com/velocity2008/public/schedule/detail/3632 • AOL: http://en.oreilly.com/velocity2009/public/schedule/detail/7579 • Yahoo!: http://www.slideshare.net/stoyan/yslow-20-presentation • Bing graphic: http://www.watchingwebsites.com/archives/proof-that-speeding-up-websites-improves-online-business • Steve Souders: http://stevesouders.com • Stoyan Stefanov: http://phpied.com • Sponsored search and speed: http://adwords.google.com/support/aw/bin/answer.py?hl=en&answer=87144

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