Node: fast HTML parsing with Stream

parser.js

var request = require('minreq') || require('request'),
    WritableStream = require('htmlparser2').WritableStream;

var count = 0;
var done = function () {
  console.log('There are ' + count + ' script tags.');
  process.exit(1);
};

var handlers = {
  onopentag: function (name, attrs) {
    if (name == "script") {
      count += 1;
    }
  },

  onend: done
};

var url = 'http://news.ycombinator.com';
var stream = new WritableStream(handlers, done);
request.get(url).pipe(stream);