Cloudnyco
e8ba091298
Applied as-is. Captured real battles live in public/dev/perf (including the round-13 联防 on the wide round battlefield), with a browser speed page and a headless benchmark. public/dev stays out of the package. The Chrome benchmark was not run. The numbers in the original pull request are from 0.1.4 and are not quoted here. Tests: node --test test/perfbench.test.js test/render/battle-perf.browser.test.js — 13 pass, 0 fail; the Chrome suite skipped (RENDER_E2E unset).
23 lines
1.3 KiB
JavaScript
23 lines
1.3 KiB
JavaScript
// public/dev/frame-stats.js — the frame figures of the battle perf page (battle-perf.js), free of the DOM so the Node
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// tests can import them (test/perfbench.test.js).
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/** `v` rounded to `d` decimals; null for NaN / ±Infinity (a figure the report shows as missing, not as 0). */
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export const round = (v, d = 1) => (Number.isFinite(v) ? Math.round(v * 10 ** d) / 10 ** d : null);
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/**
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* Average fps, frame-time percentiles (ms) and the share (%) of frames over `stutterMs`, from a sample's frame times.
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* Every figure is null without a frame time (perf.sample() always records one, but an empty run must not divide by 0).
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* @param {number[]} deltas frame times in ms (sorted in place)
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* @param {number} stutterMs a frame over this counts as a stutter frame
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*/
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export function frameFigures(deltas, stutterMs) {
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if (!deltas.length) return { fps: null, p50: null, p95: null, p99: null, over33: null };
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deltas.sort((a, b) => a - b);
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const pick = (p) => deltas[Math.min(deltas.length - 1, Math.floor(deltas.length * p))];
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const avg = deltas.reduce((a, b) => a + b, 0) / deltas.length;
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return {
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fps: avg > 0 ? round(1000 / avg) : null, p50: round(pick(0.5)), p95: round(pick(0.95)), p99: round(pick(0.99)),
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over33: round((deltas.filter((x) => x > stutterMs).length / deltas.length) * 100),
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};
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}
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