1<!DOCTYPE html> 2<html> 3<body> 4<h1 id="id" class="class"></h1> 5<script src="/resources/runner.js"></script> 6<script> 7PerfTestRunner.measureRunsPerSecond({ 8 description: "This benchmark tests querySelectorAll() for an element that appears near the head of the document", 9 run: function() { 10 for (var i = 0; i < 1000; i++) { 11 document.querySelectorAll("h1"); 12 document.querySelectorAll("#id"); 13 document.querySelectorAll(".class"); 14 } 15 }}); 16</script> 17</body> 18</html> 19