1<!DOCTYPE html> 2<body> 3<style> 4textarea:valid { 5 background-color: lime; 6} 7textarea:invalid { 8 background-color: red; 9} 10</style> 11<script src="../resources/runner.js"></script> 12<textarea maxlength=2147483647 id="container"></textarea> 13<script> 14var container = document.getElementById('container'); 15var nodes = []; 16var childCount = 1000; 17for (var i = 0; i < childCount; ++i) 18 nodes.push(document.createTextNode('A quick brown fox jumps over the lazy dog.\n')); 19PerfTestRunner.measureRunsPerSecond({run: function() { 20 for (var i = 0; i < childCount; ++i) 21 container.appendChild(nodes[i]); 22 container.innerHTML = ''; 23}}); 24</script> 25</body> 26