| <!DOCTYPE html> |
| <html> |
| <body> |
| <script src="../resources/runner.js"></script> |
| |
| <table id="testElement"> |
| <tr> |
| <th>Sender</th> |
| <td>Message</td> |
| </tr> |
| </table> |
| |
| <script> |
| var isDone = false; |
| var startTime; |
| |
| // Before the test starts, add 2000 rows to the table, something like a |
| // message board with lots of replies on a long thread. |
| |
| let table = document.getElementById('testElement'); |
| for (let i = 0; i < 2000; i++) { |
| let tr = document.createElement('tr'); |
| table.appendChild(tr); |
| let sender = document.createElement('td'); |
| sender.innerHTML = 'user' + Math.floor(10000*Math.random()); |
| tr.appendChild(sender); |
| let message = document.createElement('td'); |
| message.innerHTML = '<div>Message content ' + |
| Math.floor(10000*Math.random()) + '</div>'; |
| let link = document.createElement('a'); |
| link.href = '#'; |
| link.id = 'link' + i; |
| link.innerHTML = 'Reply'; |
| message.appendChild(link); |
| tr.appendChild(message); |
| } |
| |
| function runTest() { |
| if (startTime) { |
| PerfTestRunner.measureValueAsync(PerfTestRunner.now() - startTime); |
| PerfTestRunner.addRunTestEndMarker(); |
| } |
| if (!isDone) { |
| PerfTestRunner.addRunTestStartMarker(); |
| startTime = PerfTestRunner.now(); |
| |
| // Iterate over some of the links and focus each one with a different |
| // delay. Just focusing a link shouldn't incur a large cost, |
| // even if the page has a lot of elements. |
| for (let i = 0; i < 33; i++) { |
| window.setTimeout(() => { |
| document.getElementById('link' + i).focus(); |
| }, 250 + (2 * i)); |
| } |
| |
| // Wait to allow the asynchronous accessibility code that's |
| // covered by traceEventsToMeasure to have a chance to run. |
| setTimeout(runTest, 2500); |
| } |
| } |
| |
| PerfTestRunner.startMeasureValuesAsync({ |
| description: 'Test accessibility performance when appending to a textarea.', |
| unit: 'ms', |
| done: function () { |
| isDone = true; |
| }, |
| run: function() { |
| runTest(); |
| }, |
| iterationCount: 6, |
| tracingCategories: 'accessibility', |
| traceEventsToMeasure: [ |
| 'RenderAccessibilityImpl::SendPendingAccessibilityEvents', |
| ] |
| }); |
| </script> |
| |
| </html> |
