1'use strict';
2const common = require('../common.js');
3const { EventEmitter } = require('events');
4
5const bench = common.createBenchmark(main, {
6  events: [1, 2, 3, 5, 10, 20],
7  n: [1e6],
8});
9
10function main({ events, n }) {
11  const ee = new EventEmitter();
12  const listeners = [];
13
14  for (let k = 0; k < 10; k += 1)
15    listeners.push(() => {});
16
17  const eventNames = [];
18  for (let k = 0; k < events; ++k)
19    eventNames.push(`dummy${k}`);
20
21  bench.start();
22  for (let i = 0; i < n; i += 1) {
23    for (const eventName of eventNames) {
24      for (let k = listeners.length; --k >= 0; /* empty */) {
25        ee.on(eventName, listeners[k]);
26      }
27    }
28    for (const eventName of eventNames) {
29      for (let k = listeners.length; --k >= 0; /* empty */) {
30        ee.removeListener(eventName, listeners[k]);
31      }
32    }
33  }
34  bench.end(n);
35}
36