node/benchmark/events/ee-add-remove.js

36 lines
886 B
JavaScript

'use strict';
const common = require('../common.js');
const { EventEmitter } = require('events');
const bench = common.createBenchmark(main, {
newListener: [0, 1],
removeListener: [0, 1],
n: [1e6],
});
function main({ newListener, removeListener, n }) {
const ee = new EventEmitter();
const listeners = [];
for (let k = 0; k < 10; k += 1)
listeners.push(() => {});
if (newListener === 1)
ee.on('newListener', (event, listener) => {});
if (removeListener === 1)
ee.on('removeListener', (event, listener) => {});
bench.start();
for (let i = 0; i < n; i += 1) {
const dummy = (i % 2 === 0) ? 'dummy0' : 'dummy1';
for (let k = listeners.length; --k >= 0; /* empty */) {
ee.on(dummy, listeners[k]);
}
for (let k = listeners.length; --k >= 0; /* empty */) {
ee.removeListener(dummy, listeners[k]);
}
}
bench.end(n);
}