| OLD | NEW |
|---|
| 1 <!DOCTYPE html> | 1 <!DOCTYPE html> |
| 2 <body> | 2 <body> |
| 3 <script src="../resources/runner.js"></script> | 3 <script src="../resources/runner.js"></script> |
| 4 <script src="resources/paint.js"></script> |
| 4 <style>td { border: 1px solid blue }</style> | 5 <style>td { border: 1px solid blue }</style> |
| 5 <script> | 6 <script> |
| 6 function createTable(rows, columns) { | 7 function createTable(rows, columns) { |
| 7 var table = document.createElement("TABLE"); | 8 var table = document.createElement("TABLE"); |
| 8 // Collapsing border is not necessary to see the slowness | 9 // Collapsing border is not necessary to see the slowness |
| 9 // but it makes the painting phase ~2x slower. | 10 // but it makes the painting phase ~2x slower. |
| 10 table.style.borderCollapse = "collapse"; | 11 table.style.borderCollapse = "collapse"; |
| 11 for (var i = 0; i < rows; ++i) { | 12 for (var i = 0; i < rows; ++i) { |
| 12 var tr = document.createElement("TR"); | 13 var tr = document.createElement("TR"); |
| 13 for (var j = 0; j < columns; ++j) { | 14 for (var j = 0; j < columns; ++j) { |
| 14 var td = document.createElement("TD"); | 15 var td = document.createElement("TD"); |
| 15 tr.appendChild(td); | 16 tr.appendChild(td); |
| 16 } | 17 } |
| 17 table.appendChild(tr); | 18 table.appendChild(tr); |
| 18 } | 19 } |
| 19 return table; | 20 return table; |
| 20 } | 21 } |
| 21 | 22 |
| 22 var table = createTable(300, 320); | 23 var table = createTable(300, 320); |
| 23 document.body.appendChild(table); | 24 document.body.appendChild(table); |
| 24 | 25 |
| 25 var ix = 30; | 26 var ix = 30; |
| 26 var iy = 30; | 27 var iy = 30; |
| 27 | 28 |
| 28 PerfTestRunner.measureFrameTime({ | 29 measurePaint({ |
| 29 run: function() { | 30 run: function() { |
| 30 table.childNodes[iy].childNodes[ix].style.borderColor = "red"; | 31 table.childNodes[iy].childNodes[ix].style.borderColor = "red"; |
| 31 ix++; | 32 ix++; |
| 32 iy++; | 33 iy++; |
| 33 }, | 34 }, |
| 34 }); | 35 }); |
| 35 </script> | 36 </script> |
| 36 </body> | 37 </body> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2883603002:
Use the new tracing based measurement for blink_perf.paint (Closed)
