YSlow - Why Slow?
YSlow is an extension to the Firebug extension for Firefox. As you might be aware the Firebug extension is a very useful tool for developers to analyze a web page in terms of different components, structure and their construction. YSlow helps one analyze the performance of the website in terms of response times and the difference components within a page that is the result of the overall response time. Web page performance is a combination of implications starting from the page layout to database queries. YSlow helps in analyzing what is visible to the outside world. YSlow is from Yahoo! and they have shared the best practices for improving the performance of the web sites. A good add on Firfeox extension for the developers to keep a tab on the performance right from the beginning.
