Refresh Rate Probe
Uses requestAnimationFrame frame spacing to estimate redraw cadence against your display refresh budget. Useful as a coarse check (browser compositor, VSYNC tiering, and thermal states can skew the number). For official panel specs rely on OEM documentation — this is software-side timing only.
Estimated Hz
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Median frame (ms)
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How to use
- Click Measure ~180 frames once the GPU is warmed up.
- Keep the tab focused; background throttling lowers timing fidelity.
- Compare before/after toggling VSync, fullscreen, HDR, eco mode, or eGPU docks.
FAQ
Why doesn’t Hz match OSD readout?
We measure RAF spacing in software; OS compositing, multiplexing docks, fractional scaling, thermal limits, or forced frame caps move the headline number.
Introduction
Refresh Rate Probe leverages requestAnimationFrame deltas to summarize median milliseconds per compositor flip plus an implied Hz. Treat it like a directional hint when validating settings—not as formal metrology.
Purpose
- Compare Eco vs Performance tiers on laptops.
- Check whether docks or KVMs insert unexpected cadence jitter.