Node Server using streams to pipe html content to response (async)

server-htmlstreams.js

var http = require('http');
var fs = require('fs');

http.createServer(function(req, res) {
    // Specify html content type
    res.writeHead(200, { 'Content-Type': 'text/html' });

    // Replaced readFileSync and end with createReadStream.
    // Read contents of index.htm and pipe to writeable stream res.
    // Keeps buffer small, sends data a chunk at a time
    // to res stream, thereby improving performance
    // and avoiding synchronous operation.
    fs.createReadStream(__dirname + '/index.htm').pipe(res);

}).listen(1337, '127.0.0.1');