gistfile1.js

var async = require('async');
var https = require('https');

async.times(5, function(n, cb){
  var options = { host: 'www.google.com', port: 443, path: '', method: 'GET' };
  var startTime = new Date().getTime();
  var req = https.request(options, function(res) {
    var ms = new Date().getTime() - startTime;
    console.log(ms+"ms");
    res.on('data', function(){ });
    res.on('end', function(){ cb(); });
  });
  req.on('error', cb);
  req.end();
}, function(err){ });