Performance counter data is gathered in Test Studio to help determine system bottlenecks and fine-tune application performance. Test Studio allows you to see the requests made from the server, how long they take, as well as what bandwidth is used. Each step of the performance run is represented as a block in the top horizontal bar. You can drag the entire selection area to get details on a custom interval.
Test Studio provides you with a historical view of your performance runs. This way you’ll be able to identify at what point performance issues occurred.