| <!doctype html> |
| <script src="../resources/runner.js"></script> |
| <details id="details"> |
| <summary id="summary">summary</summary> |
| </details> |
| <summary id="summary1">added-summary1</summary> |
| <summary id="summary2">added-summary2</summary> |
| <script> |
| const host = document.querySelector("#details"); |
| const sum = document.querySelector("#summary"); |
| const sum1 = document.querySelector("#summary1"); |
| const sum2 = document.querySelector("#summary2"); |
| window.onload = function() { |
| PerfTestRunner.measureTime({ |
| description: "Measure performance of built-in detail element when summary element is inserted.", |
| run: function() { |
| const start = PerfTestRunner.now(); |
| for (let i = 0; i < 100; i++) { |
| host.appendChild(sum1); |
| host.insertBefore(sum2, sum); |
| PerfTestRunner.forceLayout(); |
| sum1.remove(); |
| sum2.remove(); |
| PerfTestRunner.forceLayout(); |
| } |
| |
| return PerfTestRunner.now() - start; |
| } |
| }); |
| } |
| </script> |
