Navigation between contentpage is slow

I have used a normal MVVM approach in my project and I am facing a problem with Xamarin.Forms Navigation. When I call the Navigation.PushAsync(new ContentPage()); approximately it takes 3-4 seconds to view the content even we have less content on the navigation page and my view and ViewModel constructor also empty(for checking purpose).

In my case, I load the views based on the server data after a successful response from the server I assign the data to view so it takes huge time variation to appear. Also, I tried custom navigation there is no time difference found between custom navigation and normal. I have more numbers of content pages in my project.

Xamarin.Forms - 4.3.0.947036

kindly suggest if any alternatives are there in Xamarin.Forms.

Best Regards,
ElayaRaj