Page Percentile report

This report shows the 85th, 90th, and 95th percentile response times for all users and all pages in a run, as well as for the 10 slowest pages in a run.

The default percentiles in this report, 85, 90, and 95, are sufficient for most purposes. However, if you are required to report on a different percentile set, click Window > Preferences > Test > Percentile Analysis Targets to change the percentiles in this report and in the Transaction Percentile report.

The Summary page shows a graph with three bars, which represent the 85th percentile, 90th percentile, and 95th percentile response times for all users and for all pages in the run. For the 85th percentile bar, 85% of all users achieved the indicated response time or better. For the 90th percentile bar, 90% of all users achieved the indicated response time or better. And for the 95% percentile bar, 95% of all users achieved the indicated response time or better.

The 85%, 90%, and 95% pages show the response-time percentiles of the 10 slowest pages in the run. For example, if you click the tab for the 85th percentile, and the total for a page is 110 (the total is beneath each bar), you know that 85 percent of the response times for that page are less than or equal to 110 milliseconds (ms).

This graph provides an overall idea of the response times for each page. For example, the Page Performance report might indicate that a Login page is one of the 10 slowest pages. However, it is possible that one page attempt was extremely slow, but the other attempts were within range. The Page Percentile report shows which pages have slow responses because they were slow in general, not because a few responses (out of many) were extremely slow.

The table beneath the graph provides more detailed information for each page:

  • The minimum response time for the run.
  • The average response time for the run.
  • The standard deviation of the average response time. The standard deviation tells you how tightly the data is grouped about the mean. For example, System A and System B both have an average response time of 12 ms. However, this does not mean that the response times are similar. System A might have response times of 11, 12, 13, and 12 ms. System B might have response times of 1, 20, 25, and 2. Although the mean time is the same, the standard deviation of System B is greater and the response time is more varied.
  • The maximum response time for the run.
  • The 85th percentile for the run. That is, for this page, 85% of the response times were equal to or faster than this time.
  • The 90th percentile for the run. That is, for this page, 90% of the response time is equal to or faster than this time.
  • The 95th percentile for the run. That is, for this page, 95% of the response time is equal to or faster than this time.
  • The number of attempts in the run.