title: Pycharm - force synchronizing to be more often/quicker
body: <p>I have Pycharm 2017.1 and large Django application with many lines of code. <strong>I use vagrant so it can be reason of slow performance (is there any way to speed up it?)</strong> Pycharm doesn't work well with it, because of many large modules.</p>
  
  <p>When i changing something in code syntax errors are still highlighed after about 5 minutes after i fix this errors.
  Automatic imports are often not performed and if i forget to import something it is detected by PyCharm very late. </p>
  
  <p>It is impossible to refactor this code :)</p>
  
  <p>I know that there is something like "synchronize" option but it not help. Perhaps it works for small projects but in my project synchronization takes too much time.
  Also "refresh" option don't help.</p>
  
  <p>Is there any way to speed up this synchronization? Perhaps some change in configuration? Any ideas?</p>