| <!DOCTYPE html> |
| <style> |
| .grid { |
| display: grid; |
| } |
| .gridItem { |
| min-height: 0; |
| min-width: 0; |
| } |
| </style> |
| |
| <script src="../resources/runner.js"></script> |
| <script> |
| 'use strict'; |
| function startTest() { |
| let root; |
| PerfTestRunner.measureRunsPerSecond({ |
| description: "Measures performance of layout on a page using deeply nested grids.", |
| setup() { |
| let node = document.createElement("div"); |
| node.className = "gridItem"; |
| node.textContent = "Inner contents"; |
| for (let i = 0; i < 16; ++i) { |
| let parent = document.createElement("div"); |
| parent.className = "grid gridItem"; |
| parent.appendChild(node); |
| node = parent; |
| } |
| root = node; |
| root.className = "grid"; |
| document.body.appendChild(root); |
| PerfTestRunner.forceLayout(); |
| }, |
| run() { |
| root.style.display = "none"; |
| PerfTestRunner.forceLayout(); |
| root.style.display = ""; |
| PerfTestRunner.forceLayout(); |
| }, |
| }); |
| } |
| </script> |
| |
| <body onload="startTest()"></body> |
