title: Socket.io loading very slow
body: <p>First time then i run web server my main page loading about 25 s and then i remove this line:</p>
  
  <p><code>&lt;script src="/socket.io/socket.io.js" type="text/javascript"&gt; &lt;/script&gt;</code> my page is working fine. So why socket.io is so slow ?</p>
  
  <pre><code>var app = express()
    , server = require('http').createServer(app)
    , io = require('socket.io').listen(server);
  
  io.enable('browser client minification');  // send minified client
  io.enable('browser client etag');          // apply etag caching logic based on version number
  io.set('log level', 1);                    // reduce logging
  io.set('transports', [
      'websocket'
    , 'flashsocket'
    , 'htmlfile'
    , 'xhr-polling'
    , 'jsonp-polling'
  ]);
  </code></pre>