Why response time of a page does not equal the sum of its requests


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The response time for a page typically differs from the sum of its requests. This does not mean that data is incorrect. The difference can be caused by...

The most common reason for the sum of the individual request times within a page to exceed the total page response time is that requests are often sent concurrently (in parallel) to a server. Thus some of the individual request response times overlap so the sum of the request response times would exceed the page response time.

Additionally, the page response time can exceed the sum of the individual request response times within the page for the following reasons:


Related reference

  1. Performance report
  2. Page Element report
  3. Percentile report
  4. Verification Points report