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anonrigmscdex
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events: add unique events benchmark
Co-authored-by: Brian White <[email protected]> PR-URL: #44657 Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: Minwoo Jung <[email protected]>
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benchmark/events/ee-listen-unique.js

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'use strict';
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const common = require('../common.js');
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const { EventEmitter } = require('events');
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const bench = common.createBenchmark(main, {
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events: [1, 2, 3, 5, 10, 20],
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n: [1e6],
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});
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function main({ events, n }) {
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const ee = new EventEmitter();
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const listeners = [];
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for (let k = 0; k < 10; k += 1)
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listeners.push(() => {});
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const eventNames = [];
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for (let k = 0; k < events; ++k)
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eventNames.push(`dummy${k}`);
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bench.start();
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for (let i = 0; i < n; i += 1) {
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for (const eventName of eventNames) {
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for (let k = listeners.length; --k >= 0; /* empty */) {
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ee.on(eventName, listeners[k]);
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}
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}
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for (const eventName of eventNames) {
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for (let k = listeners.length; --k >= 0; /* empty */) {
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ee.removeListener(eventName, listeners[k]);
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}
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}
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}
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bench.end(n);
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}

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