| <!DOCTYPE html> | |
| <!-- Measures the delay between two successive short-delay timeouts. | |
| Note that scheduler allows a small number of quick tasks to run without | |
| throttling, so the delay is 20ms to avoid this. | |
| --> | |
| <script> | |
| addEventListener('message', (e) => { | |
| setTimeout(() => { | |
| let start = performance.now(); | |
| setTimeout(() => { | |
| let end = performance.now(); | |
| e.source.postMessage(end - start, e.origin); | |
| }, 20); | |
| }, 20); | |
| }); | |
| </script> |