system test
Browser Responsiveness / Event Loop Test
Use this when a browser feels sluggish but you do not want to run a heavy CPU stress test.
No accountLocal where possibleRetest anytime
Browser & device environment
Ready
DeviceOK reports only information your browser intentionally exposes. It does not fingerprint hidden hardware or claim access to protected system details.
Private by design
Timing samples stay local.
Use the result as evidence, not a guess.
This test checks
- Short timer scheduling delay
- Worst observed delay across a bounded sample
How to read it
This is browser-main-thread responsiveness, not a hardware health test.
Extensions, background tabs, power saving and current page work can all affect it.