Browser refresh-rate test
Run a short animation sample to estimate the frame cadence this tab receives. The result can reflect your display refresh, browser scheduling, power state and current workload.
2-second animation sample
Keep this tab visible while the sample runs.
Ready for a short requestAnimationFrame timing sample.
Use the result as a baseline, not a diagnosis
BenchRush measures browser-visible input. If a result looks wrong, repeat the run, check focus and settings, compare another browser/device where practical, and use manufacturer diagnostics for hardware conclusions.
Refresh cadence is part of reaction timing
Use the browser frame estimate as environment context, not as a monitor certification.
Questions people ask
Is this the same as my monitor specification?
Not necessarily. BenchRush measures requestAnimationFrame timing visible to this browser tab, not the monitor electronics directly.
Why can the estimate be lower than 144 Hz or 240 Hz?
Background throttling, power saving, browser scheduling, compositor behavior and load can reduce the frame cadence available to the page.
How should I compare results?
Keep the tab visible, close heavy background work and run several samples. Use the median pattern as a browser baseline rather than treating one run as a lab measurement.
Privacy by default
Your personal bests, XP and streak are stored locally in this browser. The current tool does not require an account or upload your individual run to a global leaderboard.