Frame Skipping Test
We sample sequential requestAnimationFrame gaps, drop leading/trailing outliers, derive a median pacing, then tally gaps that jump far beyond that baseline.
Unexpected spikes correlate with hitch frames, compositor eviction, HDR tone-map stalls, thermal power limits, etc. Quiet systems report near-zero “suspicious” counts for the whole capture window.
Median gap
—
Suspicious gaps
—
Longest pause
—
How to use
- Let GPU clocks stabilize before interpreting counts—cold-start laptops often exhibit transient outliers.
FAQ
False positives?
OS schedulers preempt background tabs—instrument only focused foreground sessions during diagnosis.
Overview
Operationalizes jitter statistics instead of perceptual UFO replays constrained by portability—still heuristic not hardware frame grabber fidelity.