title: Vim slow performance when dealing with remote files
body: <p>I'm opening a file on a remote drive - it takes 3-4 seconds to open it - that's ok.</p>
  
  <p>But afterwards, a lot of commands become really slow.
  I'm typing <code>:help vimrc</code> - it takes 3-4 seconds to display.<br>
  I'm typing <code>:setlocal nobuflisted</code> - it takes 3-4 seconds.</p>
  
  <p>It probably has something to to with those commands accesing the filesystem. If I do <code>:setlocal list</code> it works ok. 
  Also if I switch to another buffer, everthing is back to normal again.</p>
  
  <p>Is there something I can do to improve performance?</p>