web效率評估

yahoo訂出的14條規則

1. Make Fewer HTTP Requests
2. Use a Content Delivery Network
3. Add an Expires Header
4. Gzip Components
5. Put CSS at the Top
6. Move Scripts to the Bottom
7. Avoid CSS Expressions
8. Make JavaScript and CSS External
9. Reduce DNS Lookups
10. Minify JavaScript
11. Avoid Redirects
12. Remove Duplicate Scripts
13. Configure ETags
14. Make Ajax Cacheable

還出firefox的評估外套
Yahoo! YSlow
http://developer.yahoo.com/yslow/

不要讓 JavaScript 拉長你網站的反應時間