Site Administration

Analyze Drupal Site Performance with WebPageTest for Drupal 8, 9, and 10

WebPageTest ( is a free open source resource that runs performance tests on a site, provides educational reports about what it finds, and suggests optimizations you can make. The tests performed via the WebPageTest interface include Lighthouse tests, performance-specific tests, Core Web Vitals, visual comparisons, and traceroute tests. The tool also allows saving a history of tests if you sign up for a free account. This tool won't make your site faster on its own, but it will give you some good ideas about where to focus your efforts.

In this tutorial we'll:

  • Learn how to run performance tests via the WebPageTest web interface
  • Learn how to read and interpret the results

By the end of this tutorial, you should know how to use the WebPageTest online interface to analyze a Drupal site's performance.