| <!DOCTYPE html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| <style>td { border: 1px solid blue }</style> |
| <script> |
| function createTable(rows, columns) { |
| var table = document.createElement("TABLE"); |
| // Collapsing border is not necessary to see the slowness |
| // but it makes the painting phase ~2x slower. |
| table.style.borderCollapse = "collapse"; |
| for (var i = 0; i < rows; ++i) { |
| var tr = document.createElement("TR"); |
| for (var j = 0; j < columns; ++j) { |
| var td = document.createElement("TD"); |
| tr.appendChild(td); |
| } |
| table.appendChild(tr); |
| } |
| return table; |
| } |
| |
| var table = createTable(400, 400); |
| document.body.appendChild(table); |
| |
| var y = 0; |
| PerfTestRunner.measureFrameTime({ |
| run: function() { |
| table.childNodes[y].style.height = '20px'; |
| y++; |
| }, |
| }); |
| </script> |
| </body> |
