bench-dns.js

var dns = require('dns');

var domains = require('./domains.json');
var times = [];

function solveOne(domains) {
  var domain = domains.pop();
  if(!domain && domain !== '') {
    console.log(times);
    process.exit();
  }
  else {
    var start = new Date().getTime()
    dns.resolve(domain, function (err, addresses) {
      times.push(new Date().getTime() - start);
      if (err)
        console.error('ERROR WITH', domain)
      solveOne(domains);
    });
  }
}


solveOne(domains);