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// We clamp high deltas so 30 fps is fairly ok
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var bgFps = 30;
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var desiredMsDelay = 1000 / bgFps;
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let lastTick = 0;
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function tick() {
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var now = performance.now();
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var delta = now - lastTick;
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lastTick = now;
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// @ts-ignore
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postMessage({ delta });
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}
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setInterval(tick, desiredMsDelay);
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