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'use strict'; const nodeTiming = require('internal/perf/nodetiming'); const { now } = require('internal/perf/utils'); function eventLoopUtilization(util1, util2) { const ls = nodeTiming.loopStart; if (ls <= 0) { return { idle: 0, active: 0, utilization: 0 }; } if (util2) { const idle = util1.idle - util2.idle; const active = util1.active - util2.active; return { idle, active, utilization: active / (idle + active) }; } const idle = nodeTiming.idleTime; const active = now() - ls - idle; if (!util1) { return { idle, active, utilization: active / (idle + active) }; } const idle_delta = idle - util1.idle; const active_delta = active - util1.active; const utilization = active_delta / (idle_delta + active_delta); return { idle: idle_delta, active: active_delta, utilization }; } module.exports = eventLoopUtilization;