title: eclipse very slow to start a plugin install
body: <p>I use eclipse for my projects.</p>
  
  <p>When I want to install or update a plugin, it is very very slow to calculate dependencies ( about 5 to 10 minutes) and then it is fast to download files and install them.</p>
  
  <p>Do you know how to solve that ?</p>
  
  <p>It is on Ubuntu 10.04 with latest patches + eclipse 3.6.1</p>
  
  <p>No proxy is used. I noticed the problem with several computer at home, but I do not have this problem at work (I use a proxy at work)</p>