title: Angular 7 ,Reactive Form slow response when has large data
body: <p>I have a very complex and large data and I have to build a Reactive form around it in a component.</p>
  
  <p>I've developed the form. But when I type something in one of the <code>input</code> fields to edit the populated data, it responds extremely slowly in updating the value of that field. </p>
  
  <p>I tried using <code>updateOn:'blur'</code> and <code>'submit'</code> but without any luck.</p>
  
  <p>My question is, what is best practice to handle the form with large data?</p>
  
  <p><strong>Update</strong>: This is my <a href="https://stackblitz.com/edit/angular-1yvsen?file=src%2Fapp%2Fapp.component.ts" rel="noreferrer"><strong>StackBlitz</strong></a>.</p>
  
  <p><strong>Note</strong>: I've created a very minimal version of my actual implementation and I have performance issues in the Reactive Form.</p>