This document provides tips for improving ASP.NET performance and reducing page load times and HTTP requests. It discusses optimizing the ASP.NET pipeline and process configuration, using a content delivery network, browser caching, minimizing redirects and unnecessary headers, combining and minifying scripts and CSS, and recommended tools for profiling and debugging performance issues.

1. Presented By: Mahmoud Ghoz ASP.NET Performance Secrets

2. Agenda Meet the icons Tips for reducing page load times. Tips for Minimizing HTTP Requests. Quick tips Meet the Tools

3. Meet the icons ASP.NET Developer Designer IIS Administrator Everyone

4. Tips for reducing page load times ASP.NET pipeline optimization Dev

5. Tips for reducing page load times ASP.NET pipeline optimization 14 handler are defined in machine.config(4.0) Dev

6. ASP.NET process configuration optimization Defines process level properties like How many number of threads ASP.NET uses How long it blocks a thread before timing out How many requests to keep waiting for IO works to complete. Tips for reducing page load times Dev

7. ASP.NET process configuration optimization The default is in many cases too limiting. Nowadays hardware has become quite cheap and dual core with gigabyte RAM servers have become a very common choice Tips for reducing page load times memoryLimit minWorkerThreads maxWorkerThreads (20) maxIOThreads (20) minIOThreads maxAppDomains Dev

8. Content Delivery Network (CDN) Tips for reducing page load times EdgeCast Akamai Limelight Cachefly All

9. Making best use of Browser Cache Cache Static Content for Longer Period Store cached content under a common folder Reuse Common Graphics Files SSL is Not Cached, so Minimize SSL Use HTTP POST Requests are Never Cached Tips for reducing page load times All

10. Making best use of Browser Cache Use same URLs Tips for reducing page load times www. Ghoz.NET/default.aspx Ghoz.NET/default.aspx != All

11. Making best use of Browser Cache Configure Static Content Caching in IIS Tips for reducing page load times Admin

12. Tips for reducing page load times Making best use of Browser Cache Configure Static Content Caching in IIS Admin

13. Tips for reducing page load times Making best use of Browser Cache Configure Static Content Caching in IIS Admin

14. Prevent Denial of Service (DOS) attack This should bring the server down Tips for reducing page load times When the number of request exceeds the threshold from the same IP , deny further request for some duration (DYOS) Dev

15. Use HTTP compression Tips for reducing page load times Fiddler Dev

16. Use Microsoft AJAX Minifier Remove unnecessary elements such as white space, function names, code comments, debug, and trace statements Tips for reducing page load times Dev

17. Avoid Redirects http://astrology.yahoo.com/astrology A 301 response containing a redirect to http://astrology.yahoo.com/astrology/ Tips for reducing page load times Dev

18. Use CSS sprites or Image maps Avoid using tables for layout Choose the appropriate format for images Tips for reducing page load times Designer

19. Don't Scale Images in HTML Make favicon.ico Small and Cacheable Put Style sheets at the Top Put Scripts at the Bottom Tips for reducing page load times Designer

20. TIPS FOR MINIMIZING HTTP REQUESTS

21. Fiddler Remove Unnecessary Headers All

22. X-Powered-By: ASP.NET Remove Unnecessary Headers Admin

23. Remove Unnecessary Headers X-Powered-By: ASP.NET Admin

24. Remove Unnecessary Headers X-Powered-By: ASP.NET Admin

25. Server: Microsoft-IIS/6.0 UrlScan Security Tool Security tool that restricts the types of HTTP requests that Internet Information Services (IIS) will process Remove Unnecessary Headers Server: Microsoft-IIS/7.0 Admin Dev

26. X-AspNet-Version: 2.0.50727 X-AspNet-Version: 1.1.4322 Remove Unnecessary Headers X-AspNetMvc-Version: 1.0 Dev

27. QUICK SMALL TIPS

28. Only use ViewState when necessary Set the ScriptManager LoadScriptsbeforeUI property to false. Combine Client Scripts into a Composite Script Minimize the content of the UpdatePanel Quick small tips Dev

29. Make JavaScript and CSS files external Avoid using query parameters in static content URLs Place CSS inside the head tags Avoid Redirects Caching AJAX calls on browser Use Get instead of Post Quick small tips Dev

30. TOOLS

31. Firebug https://addons.mozilla.org/en-US/firefox/addon/1843 Tools Dev

32. YSlow https://addons.mozilla.org/en-US/firefox/addon/5369 Tools Dev

33. Httpwatch http://www.httpwatch.com/download/ Tools Dev

34. Page-Speed http://code.google.com/speed/page-speed/ Tools Dev

35. Dust-Me Selectors Firefox extension it finds out which selectors in the stylesheets used are not used. http://www.sitepoint.com/dustmeselectors/ Tools Dev

36. Bird-Power Minify the JavaScript Files Minify the CSS Files Mash files together Validate JavaScript Files Integrated with Visual Studio http://www.weirdlover.com/2010/07/18/chirpy-attains-godlike-abilities-in-version-1-0-0-4/ Tools Dev

37. REFERENCE

38. http://www.codeproject.com/KB/aspnet/10ASPNetPerformance.aspx http://www.4guysfromrolla.com/articles/120209-1.aspx http://developer.yahoo.com/performance/rules.html Reference

39. WebClientGuidance 2009-11-30 http://technet.microsoft.com/en-us/security/cc242650.aspx Reference

40. Questions

41. Thank You