<html>
<script>
(function() {
var crossOrigin = 'http://localhost:8000';
var filePath = "/page_load_metrics/empty.js";
var src = crossOrigin + filePath;
document.write('<scr' + 'ipt src="' + src + '" async></scr' + 'ipt>');
})();
</script>
<body>
This page uses document.write to load external js.
</body>