I have recently came by the article “High performance websites” in yahoo developer network. This article pointed 13 key points to speed up your application. These are 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
![Performance tips for web applications](https://cdn-ak-scissors.b.st-hatena.com/image/square/8d71ff5111e05619a10d29bb40d7aebaa75c8fbc/height=288;version=1;width=512/https%3A%2F%2Fs0.wp.com%2Fi%2Fblank.jpg)