buf.js

// USAGE: node buf.js output_file buffer_size iteration
// Example: node buf.js derp 51200 1000

var fs = require('fs');
var file = process.argv[2];

var size = Number(process.argv[3]);
var thinger = [];

fs.open(file, 'w', function (err, fd) {

    for (var i=0; i<process.argv[4];i++) {
        var buf = new Buffer(size);
        thinger.push[buf];
        fs.writeSync(fd, buf, 0, buf.length);
    }
    fs.close(fd);
});

server.js

var express = require('express');
var app = express();

app.get('/test', function(req, res){
    console.log(req.query);
    res.send("HELLO LNUG");
});


var server = app.listen(3000, function() {
    console.log('Listening on port %d', server.address().port);
});