'use strict'; const common = require('../common.js'); const lookup = require('dns').lookup; const bench = common.createBenchmark(main, { name: ['127.0.0.1', '::1'], all: ['true', 'false'], n: [5e6] }); function main({ name, n, all }) { var i = 0; if (all === 'true') { const opts = { all: true }; bench.start(); (function cb() { if (i++ === n) { bench.end(n); return; } lookup(name, opts, cb); })(); } else { bench.start(); (function cb() { if (i++ === n) { bench.end(n); return; } lookup(name, cb); })(); } }