| <!DOCTYPE html> | |
| <meta charset="utf-8" /> | |
| <script> | |
| const url = new URL(new URLSearchParams(location.search.substr(1)).get('url'), location.href); | |
| const before = performance.now(); | |
| fetch(url) | |
| .then(r => r.text()) | |
| .then(() => | |
| parent.postMessage({ | |
| before, | |
| after: performance.now(), | |
| entry: performance.getEntriesByName(url)[0].toJSON() | |
| })); | |
| </script> |