node.js html parser (jquery style) benchmark

parser_bench.js

var fs = require('fs'),
    async = require('async');

var try_series = function(func_name, func, data, times, cb){
  var start = new Date();
  var tries = new Array(times);
  for(var i = 0 ; i < times ; i++) {
    tries[i] = function(callback){func(data, callback);};
  }
  async.series(tries, function(err,result){
    var end = new Date();
    console.log(func_name + ':' + (end - start) + ' in ' + times + ' times.');
    cb(null, result);
  });
};

var jquery = fs.readFileSync("./jquery-1.8.2.min.js").toString();
var jsdom_parse = function(data, callback){
  var jsdom = require("jsdom");
  jsdom.env({
    html: data,
    src: [jquery],
    done: function(errors, window){
      var $ = window.$;
      callback(null, $('#01-01').attr('class'));
    }
  });
};

var jquery_parse = function(data, callback){
  var $ = require('jQuery');
  $(data);
  callback(null, $('#01-01').attr('class'));
};

var cheerio_parse = function(data, callback){
  var cheerio = require('cheerio'),
      $ = cheerio.load(data);
  callback(null, $('#01-01').attr('class'));
};

var text = fs.readFileSync('./target.html').toString();

var times = 100;
async.series([
  function(cb){try_series('jsdom', jsdom_parse, text, times, cb);},
  function(cb){try_series('jQuery', jquery_parse, text, times, cb);},
  function(cb){try_series('cheerio', cheerio_parse, text, times, cb);}
], function(err,result){
  console.log({err:err, results:result.map(function(d){return d.length;})});
});