| OLD | NEW |
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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <body> |
| 3 <script src="../resources/runner.js"></script> |
| 4 <style>td { border: 0 solid blue }</style> |
| 5 <script> |
| 6 function createTable(rows, columns) { |
| 7 var table = document.createElement("TABLE"); |
| 8 // Collapsing border is not necessary to see the slowness |
| 9 // but it makes the painting phase ~2x slower. |
| 10 table.style.borderCollapse = "collapse"; |
| 11 for (var i = 0; i < rows; ++i) { |
| 12 var tr = document.createElement("TR"); |
| 13 for (var j = 0; j < columns; ++j) { |
| 14 var td = document.createElement("TD"); |
| 15 tr.appendChild(td); |
| 16 } |
| 17 table.appendChild(tr); |
| 18 } |
| 19 return table; |
| 20 } |
| 21 |
| 22 var table = createTable(600, 600); |
| 23 document.body.appendChild(table); |
| 24 |
| 25 var ix = 30; |
| 26 var iy = 30; |
| 27 |
| 28 PerfTestRunner.measureFrameTime({ |
| 29 run: function() { |
| 30 table.childNodes[iy].childNodes[ix].style.backgroundColor = 'teal'; |
| 31 ix++; |
| 32 iy++; |
| 33 }, |
| 34 }); |
| 35 </script> |
| 36 </body> |
| OLD | NEW |
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Chromium Code Reviews
Issue 2842313002:
Add two large table collapsed border performance tests (Closed)
