    <button type="button" onclick="run()">run performance tests</button>
      </div>
    </div>
    <div id="running">
      <div>running tests</div>
    </div>
  </div>
  <div style="display: flex;">
    <div style="flex: 1 0 0; padding: 0 10px; border-right: 1px solid #eee;">
      <div id="results"></div>
    </div>
    <div style="flex: 1 0 0; padding: 0 0 0 10px;">
      <div id="render-container"></div>
    </div>
  </div>
  <div id="build" style="display: none;"></div>

  <script src="./js/xhr-check