title: What can cause input lag when using formControlName on a textarea?
body: <p>I have a textarea which I use in a formGroup:</p>
  <pre><code>&lt;form [formGroup]=&quot;form&quot;&gt;
   &lt;textarea formControlName=&quot;area&quot;&gt;&lt;/textarea&gt;
  &lt;/form&gt;
  </code></pre>
  <pre><code>export class MyComponent implements OnInit {
  public form: FormGroup;
  
   ngOnInit(): void {
    this.form = new FormGroup({
    area: new FormControl(null)
    });
   }
  }
  </code></pre>
  <p>This works functionally, but for some reason the textarea becomes very slow in Firefox, IE and Edge. It works fine in Chrome. If I remove the formControlName the textarea is fine again (but of course does not work).
  With slow I mean input lag.</p>
  <p>If I isolate this component and put only this on the page, it is fine. So somehting else on the same page must interfere with it, but I have no idea what. The page consists of multiple components but nothing too fancy or complicated.
  Validation only occurs when submit is pushed (using <code>(submit)</code>).
  The same problem occurs on different pages, but the severity differs.</p>
  <p>What can have such an impact that the moment I put on the formControlName there is input lag? Is there a way too measure possible performance issues? I have little experience in this area.</p>