title: How often should you use git-gc?
body: <p>How often should you use git-gc?  </p>
  
  <p>The <a href="http://www.kernel.org/pub/software/scm/git/docs/git-gc.html" rel="noreferrer">manual page</a> simply says:</p>
  
  <blockquote>
    <p>Users are encouraged to run this task on a regular basis within each repository to maintain good disk space utilization and good operating performance.</p>
  </blockquote>
  
  <p>Are there some commands to get some object counts to find out whether it's time to gc?</p>