title: which is better getting all the data up front or getting data on demand for an iOS App
body: <p>I am currently on an iOS app that has three table view controllers - Currently, I am sending HTTP request to get JSON data for from my first table view controller, then another HTTP request for my second then the third. </p>
  
  <p>Is there any benefit of getting all data up front? or Getting data on demand as a user goes to each view controller. </p>
  
  <p>Any help would be appreciated! Thanks </p>