title: When to use RecyclerView setHasFixedSize(true)?
body: <p>I've read the Android developer info and a number of SO posts and RecyclerView articles.  I'm still unclear as to whether I can use the:</p>
  
  <pre><code>recyclerView.setHasFixedSize(true);
  </code></pre>
  
  <p>method on my RecyclerView list.  The size of my RecyclerView list will constantly change as CardView items are dynamically added and deleted over time.  However, the size (height and length) of each CardViews is fixed.  Please advise.</p>