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| (Empty) |
| 1 <!DOCTYPE html> | |
| 2 <script src="../resources/runner.js"></script> | |
| 3 <pre id="log"></pre> | |
| 4 <script> | |
| 5 // We discard the first iteration to avoid a cold outlier. | |
| 6 var iterations = 11; | |
| 7 var results = []; | |
| 8 var previousFrameTime = -1; | |
| 9 var now = function(){ | |
| 10 return window.performance ? performance.now() : Date.now(); | |
| 11 }; | |
| 12 | |
| 13 function createTable(rows, columns) { | |
| 14 var table = document.createElement("TABLE"); | |
| 15 // Collapsing border is not necessary to see the slowness | |
| 16 // but it makes the painting phase ~2x slower. | |
| 17 table.style.borderCollapse = "collapse"; | |
| 18 for (var i = 0; i < rows; ++i) { | |
| 19 var tr = document.createElement("TR"); | |
| 20 for (var j = 0; j < columns; ++j) { | |
| 21 var td = document.createElement("TD"); | |
| 22 tr.appendChild(td); | |
| 23 } | |
| 24 table.appendChild(tr); | |
| 25 } | |
| 26 return table; | |
| 27 } | |
| 28 | |
| 29 | |
| 30 var table = createTable(300, 320); | |
| 31 document.body.appendChild(table); | |
| 32 | |
| 33 ix=30; | |
| 34 iy=30; | |
| 35 | |
| 36 function toggleBackgroundColor() | |
| 37 { | |
| 38 var thisFrameTime = now(); | |
| 39 if (previousFrameTime != -1) | |
| 40 results.push(thisFrameTime - previousFrameTime); | |
| 41 previousFrameTime = thisFrameTime; | |
| 42 | |
| 43 if (iterations == 0) { | |
| 44 PerfTestRunner.logStatistics(results, 'ms', "Time:"); | |
| 45 if (window.testRunner) | |
| 46 testRunner.notifyDone(); | |
| 47 } else { | |
| 48 iterations--; | |
| 49 window.requestAnimationFrame(toggleBackgroundColor); | |
| 50 } | |
| 51 | |
| 52 table.childNodes[iy].childNodes[ix].style.backgroundColor = 'teal'; | |
| 53 ix++; | |
| 54 iy++; | |
| 55 } | |
| 56 | |
| 57 if (window.testRunner) | |
| 58 testRunner.waitUntilDone(); | |
| 59 | |
| 60 // Start the test after two frame to ensure we have set-up, laid out and painted
the table. | |
| 61 window.requestAnimationFrame(function() { window.requestAnimationFrame(toggleBac
kgroundColor) }); | |
| 62 </script> | |
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Chromium Code Reviews
Issue 1550833002:
PerformanceTests/Layout/large-table-background-change* to Paint (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master