>

      <p>
        HTTP Archive&#8217;s private instance of WebPageTest is kept in sync with the latest public version and augmented with <a hreflang="en" href="https://github.com/HTTPArchive/custom-metrics">custom metrics</a>, which are snippets of JavaScript that are evaluated on each website at the end of the test.
      </p>

      <p>
        The results of each test are made available as a <a href="https://en.wikipedia.org/wiki/HAR_(file_format)">HAR file</a>, a JSON-formatted archive file containin