Response Time


Response Time report represents the values of server response time. Average and maximum response times are the most important characteristics of load testing. They tell you how long a user waits for server response to his request. You should ensure that users of your site/application get the response in acceptable time.

There are 3 important limits for response time values:
0.1 second. It is an ideal response time. Users feel that the system is reacting instantaneously, and don't sense any interruption.
1.0 second. It is the highest acceptable response time. Users still don't feel an interruption, though they will notice the delay. Response times above 1 second interrupt user experience.
10 seconds. It is the limit after which response time becomes unacceptable. Moreover, recent studies show that if response time exceeds 8 seconds, user experience is interrupted very much and most users will leave the site or system.

Normally, response times should be as fast as possible. The interval of most comfortable response times is 0.1 - 1 second. Although people can adapt to slower response times, they are generally dissatisfied with the times longer than 2 seconds.

Click on the Response Time subfolder of Summary Report folder in the Navigation Pane to view the Response Time report.



You can see the minimum (Min), maximum (Max), average (Avg) and Avg80-99 values of response time for each request, as well as the performance degradation factor (PDF). Performance degradation factor is a ratio of the response time to the baseline time for each request. It shows the degradation of performance under load.

There are two values of response time in each cell: without page elements and including page elements (the last is shown in brackets).

Next to the name of each request you can see how many times it was processed at the specified periods of time.

If some column in the table is empty, it means that request wasn't executed during a period specified in column header. Decrease the Number of columns in tables value in the Report Options. Time intervals represented in column headers will become longer. Run the test again to verify that you get correct results. In the Report Options view you can also adjust the report appearance - you can define what time values (minimum, maximum, average) will be shown in the reports.

Task time




This table shows the time of processing of various tasks that you added to user profiles. A task is a sequence of requests inside the Task operator. The program calculates the total time of processing of such sequences of requests.

In the table you can see the minimum (Min), maximum (Max), average (Avg) and Avg80-99 values of task time. There are two values of time in each cell: without page elements and including page elements (the last is shown in brackets). Also you can see the performance degradation factor (PDF) calculated for the whole task for the specified periods of time.

Next to the name of each task you can see how many times it was processed (it is the number of completed tasks). A task is considered completed if all its elements were completed.

Response time degradation factor


This table shows the response time degradation factor for each profile of current scenario. To calculate the degradation factor for the whole profile, WAPT Pro takes the values of response time degradation factor for each request of that profile and calculates the root-mean-square value.

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