title: very slow tests through selenium grid
body: <p>machine1:
  <code>java -jar selenium-server-standalone-2.43.1.jar -role hub</code></p>
  
  <p>machine2:
  <code>java -jar selenium-server-standalone-2.43.1.jar -role node -browser browserName=chrome,maxInstances=1</code></p>
  
  <p>All tests go to web app on the third machine. From fourth machine I run same amount of tests:</p>
  
  <ul>
  <li><p>locally: 0m27s</p></li>
  <li><p>remotely through grid: 2m50s</p></li>
  </ul>
  
  <p>All of them running on the same local network. Why it's so slow then?
  What should I check to find the bottleneck?</p>
  
  <p>UPDATE1: ping between all machines ~0.03ms-0.89ms  </p>