Best Developer Practices For Optimizing Website Performance

If you are developing or have developed a website and site performance is your main concern, this post is what you may want to read in details with your eyes open wide. There are several factors that affect website performance. The list below, which has been taken from yahoo developer’s network as  a reference, might help you a lot to find out where your site is performing poor or what areas of your website needs re-modeling in order to make it behave better in terms of performance. At the end of this post, you will find a link to the original post which gives the details on each of the points mentioned below.
1. Make Fewer 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 <link> 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
The items above has been reference from Yahoo’s Developer Nework. Full details on each of these items is available at:

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