title: Comparing Object Or Just IDs
body: <p>Is there a performance gain in comparing objects like this...</p>
  
  <pre><code>current_user.id == @user.id
  </code></pre>
  
  <p>versus this ...</p>
  
  <pre><code>current_user == @user
  </code></pre>
  
  <p>Also are there best-practice reasons for doing one over the other regardless of performance?</p>