A customer of our recently enquired how to performance test a web site with Reverse Ajax / Comet. It can be difficult as most tools won't do it, however the following configuration in QTest should do it: Task Group1: Standard HTTP stream - all HTTP requests are made in this script, the script is made by a standard recording session in QTest, the addition of global variables used as flags control the flow of the script. Task Group2: TCP scripting set up to simulate an HTTP request and listen for further responses. TCP scripting enables a hack of HTTP. Responses are used to control global variable flags which are used to control the HTTP script in Task Group1. QTest is available at http://www.quotium.com/