'use strict'; const common = require('../common.js'); const { MessageChannel } = require('worker_threads'); const bench = common.createBenchmark(main, { payload: ['string', 'object'], style: ['eventtarget', 'eventemitter'], n: [1e6] }); function main(conf) { const n = conf.n; let payload; switch (conf.payload) { case 'string': payload = 'hello world!'; break; case 'object': payload = { action: 'pewpewpew', powerLevel: 9001 }; break; default: throw new Error('Unsupported payload type'); } const { port1, port2 } = new MessageChannel(); let messages = 0; function listener() { if (messages++ === n) { bench.end(n); port1.close(); } else { write(); } } switch (conf.style) { case 'eventtarget': port2.onmessage = listener; break; case 'eventemitter': port2.on('message', listener); break; default: throw new Error('Unsupported listener type'); } bench.start(); write(); function write() { port1.postMessage(payload); } }