title: Android Studio is very slow
body: <p>I have a project with about 20 modules inside. Gradle clean takes about 5min. As ell if i add a new module gradle update projects needs more than 5min.</p>
  
  <p>There are no dependencies to external libraries. Dependencies are only inside the project between several modules.</p>
  
  <p>I had same Project without gradle and it worked fine. I did not convert the old project to gradle. I have created a new project with the file structure recomended by gradle. But with this performance this is not very usefull...</p>
  
  <p>Any idea what's going wrong with gradle? </p>