<!--
  Experiment to run the tests in multiple popup windows.
  No perf improvement has been observed.
-->
<script>
  for (let i = 0; i < 4; ++i) {
    const x = (i % 2) * 450;
    const y = Math.floor(i / 2) * 550;
    window.open(
      `gms.html${window.location.hash}`,
      `gms_${i + 1}`,
      `width=${400},height=${400},top=${y},left=${x},toolbar=no,menubar=no,scrollbars=no,resizable=no,location=no,status=no`
    );
  }
</script>