SchedulerStats

Rolling paint-time snapshot. Populated by FrameScheduler on every tick so embedders can surface performance overlays / dev HUDs.

lastMs is the most recent paint's wall-clock duration.
avgMs is a 30-sample rolling average (~0.5s at 60fps) — smooths out single-frame spikes so the reported number is stable.
peakMs is the max across the rolling window.
frameCount is monotonic total frames since construction.
lastDirtyMask is the last paint's dirty-layer bitmask so consumers can see which layers were costly.

Example

code

const stats: SchedulerStats = chart.getPerfStats();
if (stats.avgMs > 16) console.warn('paint over budget');

code

readonly avgMs: number;

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readonly frameCount: number;

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readonly lastDirtyMask: number;

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readonly lastMs: number;

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readonly peakMs: number;