Hello Mihai,
There is not currently a feature to accomplish this automatically through the user interface. You can receive email updates when a test list executing in performance mode completes. However, to receive emails from Test Studio only when the results of a performance test meet certain criteria, you will need to use code.
To do so, you will need to create a test studio extension. The following code sample is an example of accessing the performance results, specifically, writing the server and client time for each step in the performance test.
You can also
use C# to generate emails with output from your extension.
Please let us know if we can assist you further.
All the best,
Byron
the Telerik team