Web Site Performance Analysis Tools in Your Web Browser
Web users do not want to wait a long time for a Web page to load. The major search engines are no different from the Web users; they do not want to wait for pages to load. Page loading time is an important issue for webmasters and its importance increases as competition grows fiercer and large data centers play important role in delivering Web content.
Tools for measuring page load time are many of wide variety. The latest trend is very visible in modern Web browsers that either have analysis tools inside the browser or as a plugin. The Web browser is the perfect place for Web site analysis tools on a per-page basis. Analyzing an entire large-scale Web site requires other tools and other measures.
Some already know and use the YSlow add-on alongside Firebug. YSlow requires the Firebug add-on. The YSlow add-on ranks Web site performance based on certain rules and gives valuable clues on how to optimize your Web site for maximum performance.