Angular 7 ,Reactive Form slow response when has large data

I have a very complex and large data and I have to build a Reactive form around it in a component.

I've developed the form. But when I type something in one of the input fields to edit the populated data, it responds extremely slowly in updating the value of that field.

I tried using updateOn:'blur' and 'submit' but without any luck.

My question is, what is best practice to handle the form with large data?

Update: This is my StackBlitz.

Note: I've created a very minimal version of my actual implementation and I have performance issues in the Reactive Form.

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