title: Search as you type for large Core-Data data set
body: <p>I have a large core-data data set and i want to add search support. Currently i'm using fetched results controller to show the data in a uitableview. I'm planning on using UISearchDisplayController. Now i have two options:</p>
  
  <ol>
  <li>Create a new fetched results controller for searched data</li>
  <li>Use an array to show the filtered data</li>
  </ol>
  
  <p>Which approach is more appropriate/recommended (particularly for search-as-you-type)? Is there any book or tutorial that addresses how to implement the suggested solution?</p>