<!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> |