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29 lines
716 B
TypeScript
29 lines
716 B
TypeScript
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let lastUpdate = Date.now();
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/**
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* This object indicats how overloaded the main thread is
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*/
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export const perf = {
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budget: 1,
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threshold: 1.05, // trial and error appears about right
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ok: true,
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last: lastUpdate,
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};
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// Expose this as a global object so it can be changed locally
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// NOTE: when we are confident this is the right budget, this should be removed
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(window as any).grafanaStreamingPerf = perf;
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// target is 20hz (50ms), but we poll at 100ms to smooth out jitter
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const interval = 100;
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function measure() {
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const now = Date.now();
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perf.last = now;
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perf.budget = (now - lastUpdate) / interval;
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perf.ok = perf.budget <= perf.threshold;
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lastUpdate = now;
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}
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setInterval(measure, interval);
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