As soon a replay has been initiated, the replay selector will appear at the top of the testcase editor.The testcase editor reflects the performance measurements of the selected replay for the testcase. When looking at a replay, Load Tester will automatically show a size comparison between the active replay, and the original recording, as shown below.
To display the changes in performance of web pages, open the Testcase Report . This can be done in the Testcase editor by pressing "Options", then "Open Testcase Report". Then navigate to the Performance Trends section of the report.