current/benchmark/events/eventtarget.js
'use strict';
const common = require('../common.js');
const bench = common.createBenchmark(main, {
n: [1e6],
listeners: [1, 5, 10]
}, { flags: ['--expose-internals'] });
function main({ n, listeners }) {
const { EventTarget, Event } = require('internal/event_target');
const target = new EventTarget();
for (let n = 0; n < listeners; n++)
target.addEventListener('foo', () => {});
bench.start();
for (let i = 0; i < n; i++) {
target.dispatchEvent(new Event('foo'));
}
bench.end(n);
}