The document discusses performance anti-patterns in Ajax applications. It covers the anatomy of web 2.0 applications, the impact of slow performance on users, common performance anti-patterns like too many network requests and mistakes with JavaScript frameworks, and how to analyze slow pages in 5 minutes using free tools. The presentation aims to help attendees avoid common mistakes that can slow down Ajax apps and analyze where pages are slow.

1. Performance Anti-Patterns in Ajax Applications Andreas Grabner Technology Strategist dynaTrace Software Inc. [email_address]

2. { “name” : “Andreas Grabner”, “blog” : “http://blog.dynatrace.com”, “worked for” : “Segue Software, Borland Software” “working for” : “dynaTrace Software”, “location”: “Boston, MA”, “Focus” : “Application Performance Management”, “Latest Project” : “dynaTrace AJAX Edition” }

3. What will we cover today? * Anatomy of Web 2.0 Applications * Impact of End-User Performance on your end-users * Common Performance Anti-Patterns * Real Life Examples of why pages are slow What will you learn? * Avoid common mistakes when using frameworks like jQuery, … * What are expensive operations in AJAX Apps * How to analyze your slow web pages in 5 minutes with free tools

4. The Anatomy of a Web 2.0 Application Server Latency Datavolume Content Construction Caching Network Browser JavaScript Layouting AJAX/XHR Calls Rendering DOM

5. Impact of End-User Performance Bing & Google tested end user click behavior with artificially slowed pages http://radar.oreilly.com/2009/06/bing-and-google-agree-slow-pag.html Shopzilla boosted business with faster performance http://en.oreilly.com/velocity2009/public/schedule/detail/7709

15. Real Life Examples of why pages are slow

18. Questions