title: What would be the optimal solution for the following with respect to an enterprise application:
body: <ol>
  <li><p>I want to get the list of 1000+ users and show them in UI? Should I show all the users at once? If not, how to show them? I have seen browser hanging due to large amount of data manipulation.</p></li>
  <li><p>I want to give a special coupon to the users whose age is more than 50. Should I call database   to get the users whose age is greater than 50, again?</p></li>
  <li><p>I want to manipulate a specific user data. Which data structure should I follow while getting the user data from database?</p></li>
  </ol>
  
  <p>Please forgive me if you find this  very noob. But please understand I want to know how to tackle this optimally! Please answer</p>