 class="anchor-link">Metrics</a></h3>

      <p>
        HTTP Archive collects thousands of metrics about how the web is built. It includes basic metrics like the number of bytes per page, whether the page was loaded over HTTPS, and individual request and response headers. The majority of these metrics are provided by <a href="#webpagetest">WebPageTest</a>, which acts as the test runner for each website.
      </p>

      <p>
        Other testing tools are used to provide more advanced metrics about the pa