| Ensure PerformanceObserver callback fires even if the JS does not keep the PerformanceObserver object alive. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PerformanceObserver callback fired: 1 entries | |
| PASS mark1 | |
| PerformanceObserver callback fired: 2 entries | |
| PASS mark2 | |
| PASS mark3 | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |