var net = require('net'); var PHRASE = "hello world"; var write = function(socket) { socket.write(PHRASE, 'utf8'); } for (var i = 0; i < 1000; i++) { (function() { var socket = net.connect(7000, 'localhost', function() { socket.on('data', function(reply) { if (reply.toString().indexOf(PHRASE) != 0) console.error("Problem! '" + reply + "'" + " '" + PHRASE + "'"); else write(socket); }); write(socket); }); })(); }