12:53 PM

Over at the Yahoo! User Interface Blog, Performance Research, Part 1: What the 80/20 Rule Tells Us about Reducing HTTP Requests:

Using a packet sniffer, we discover what takes place in that other 80%. Figure 1 is a graphical view of where the time is spent loading http://www.yahoo.com with an empty cache. Each bar represents a specific component and is shown in the order started by the browser. The first bar is the time spent for the browser to retrieve just the HTML document. Notice only 10% of the time is spent here for the browser to request the HTML page, and for apache to stitch together the HTML and return the response back to the browser. The other 90% of the time is spent fetching other components in the page including images, scripts and stylesheets.