| 1 | import { installPerformancePressureMonitor } from "../../../frontend/src/lib/crash"; |
| 2 | |
| 3 | const params = new URLSearchParams(location.search); |
| 4 | if (params.get("benchmark") === "1") { |
| 5 | document.hasFocus = () => true; |
| 6 | Object.defineProperty(document, "visibilityState", { get: () => "visible" }); |
| 7 | } |
| 8 | if (params.get("monitor") === "1") installPerformancePressureMonitor(); |
| 9 | |
| 10 | function burn(ms: number) { |
| 11 | const end = performance.now() + ms; |
| 12 | while (performance.now() < end) Math.sqrt(Math.random()); |
| 13 | } |
| 14 | async function run(ms: number) { |
| 15 | const times: number[] = []; |
| 16 | let frames = 0; |
| 17 | let last = performance.now(); |
| 18 | const start = last; |
| 19 | await new Promise<void>((resolve) => { |
| 20 | function workFrame() { |
| 21 | const now = performance.now(); |
| 22 | times.push(now - last); |
| 23 | last = now; |
| 24 | let sum = 0; |
| 25 | for (let i = 0; i < 100000; i++) sum += Math.sin(i + frames); |
| 26 | document.getElementById("output")!.textContent = Array(200).fill(String(sum)).join("\n"); |
| 27 | frames++; |
| 28 | if (now - start < ms) requestAnimationFrame(workFrame); else resolve(); |
| 29 | } |
| 30 | requestAnimationFrame(workFrame); |
| 31 | }); |
| 32 | times.sort((a, b) => a - b); |
| 33 | return { frames, elapsedMs: performance.now() - start, frameP95Ms: times[Math.floor(times.length * .95)], frameMaxMs: times[times.length - 1] }; |
| 34 | } |
| 35 | Object.assign(window, { diagnosticFixture: { run, burn } }); |
| 36 | document.getElementById("work")!.onclick = () => burn(950); |
| 37 |