'use strict'; var http = require('http'); var concurrency = 30; var port = 12346; var n = 700; var bytes = 1024 * 5; var requests = 0; var responses = 0; var body = 'C'.repeat(bytes); var server = http.createServer(function(req, res) { res.writeHead(200, { 'Content-Type': 'text/plain', 'Content-Length': body.length }); res.end(body); }); server.listen(port, function() { var agent = new http.Agent(); agent.maxSockets = concurrency; for (var i = 0; i < n; i++) { var req = http.get({ port: port, path: '/', agent: agent }, function(res) { res.resume(); res.on('end', function() { if (++responses === n) { server.close(); } }); }); req.id = i; requests++; } });