Tips and tricks for performance tuning of web application

Question

Hi all,

I need to have different options to optimize performance and speed up web application.

Basically I need for asp.net web applications. What do you follow while building an web application or website considering performance of the website or web application ?

Please help with suggestions.

Thanks in advance.

Answer 1

Read

Best Practices For Speeding Your Website

1. Minimize HTTP Requests

2. Use a Content Delivery Network

3. Add an Expires or a Cache-Control Header

4. Gzip Components

5. Put Stylesheets at the Top

6. Put Scripts at the Bottom

7. Avoid CSS Expressions

8. Make JavaScript and CSS External

9. Reduce DNS Lookups

10. Minify JavaScript and CSS

11. Avoid Redirects

12. Remove Duplicate Scripts

13. Configure ETags

14. Make Ajax Cacheable

15. Flush the Buffer Early

16. Use GET for AJAX Requests

17. Post-load Components

18. Preload Components

19. Reduce the Number of DOM Elements

20. Split Components Across Domains

21. Minimize the Number of iframes

22. No 404s

23. Reduce Cookie Size

24. Use Cookie-free Domains for Components

25. Minimize DOM Access

26. Develop Smart Event Handlers

27. Choose over @import

28. Avoid Filters

29. Optimize Images

30. Optimize CSS Sprites

31. Don't Scale Images in HTML

32. Make favicon.ico Small and Cacheable

33. Keep Components under 25K

34. Pack Components into a Multipart Document

You can use YSlow for Firebug to measure the performance of your page.

Answer 2

Check asp.NET optimization

http://msdn.microsoft.com/en-us/library/44e5wy6k%28VS.71%29.aspx

Answer 3

10 tips for speeding up ASP.NET Web applications: http://msdn.microsoft.com/en-us/magazine/cc163854.aspx

I usually trawl the Web for conference slide decks, etc :-)

Answer 4

One tip: make sure you know where the bottlenecks are before you start optimising.

Use profiling tools and the tips mentioned in the links to find where your app is probably being slowed down. Many devs get caught in premature optimisation or optimising the wrong bits of code and just waste their time.

Answer 5

Here's a great a reference.

http://www.codeproject.com/KB/aspnet/10ASPNetPerformance.aspx

Answer 6

If your web application makes significant use of a database you should also look at optimising that...database access code can be a greater cause of slow performance than download times.