Visual Round Trip Analyzer is a free tool from Microsoft to test the performance of your web pages. It is a website performance analyzer and visualizer tool which works over Network Monitor. So if you are a web developer or a tester you can use Visual Round Trip Analyzer(VRTA) to test your website. So you can easily make changes to your code to improve the performance. VRTA can examine the communications protocol and identifies the causes of excessive round-trips with recommended solutions to improve the website performance.
VRTA works over NetMon(You can also get NetMon for free from Microsoft). VRTA will display the http traffic in dimensions. It can display the all file view which shows all the details and critical measurements for each file that is loaded. Visual Round Trip Analyzer will generate a detailed report which includes file transfers that are exceptions to best practices.
VRTA works on Windows Server 2003 SP1, Windows Server 2008, Windows Vista and Windows XP and requires .NET framework 3.0 and netmon v3.2.