Laggy/slow animation when changing view

The animation when changing view is somewhat sluggish. Atm I'm using the Genymotion emulator but I've tried on a Galaxy S2 as well and the results were similar..

Any suggestions on what could/should be done differently?

Here is the code:

`

    using System;
    using System.ComponentModel;
    using System.Windows.Input;
    using Xamarin.Forms;

    namespace Testing
    {
public class TestViewModel : BaseViewModel // BaseViewModel is basically empty atm
{

    ICommand  btnTestCommand;

    public ICommand BtnTestCommand
    {
        get { return btnTestCommand; }
        set
        {
            if (btnTestCommand == value)
                return;
            btnTestCommand = value;
            OnPropertyChanged ();
        }
    }
    public TestViewModel ()
    {
        BtnTestCommand = new Command (() => {
            Navigation.PushAsync(new TestView(new TestViewModel()));
        }
        );

    }
}

}

    using System;
    using Xamarin.Forms;

    namespace Testing
    {
public class TestView : ContentPage
{
    public TestView (BaseViewModel basemodel)
    {

        BindingContext = basemodel;
        basemodel.Navigation = Navigation;

        NavigationPage.SetHasNavigationBar (this, true);

        var stack = new StackLayout {
            Orientation = StackOrientation.Vertical,
            Padding = new Thickness(0, 25, 0, 25)
        };

        Label header = new Label
        {
            Text = "MyHeader",
            TextColor = Color.FromHex("00ff00"),
            //Font = Font.BoldSystemFontOfSize(25),
            HorizontalOptions = LayoutOptions.Center
        };

        Label lblA = new Label
        {
            Text = "lblA",
            TextColor = Color.FromHex("00ff00"),
            //Font = Font.BoldSystemFontOfSize(25),
            HorizontalOptions = LayoutOptions.Center
        };

        Label lblB = new Label
        {
            Text = "lblB",
            TextColor = Color.FromHex("00ff00"),
            Font = Font.BoldSystemFontOfSize(25),
            HorizontalOptions = LayoutOptions.Center
        };

        var btnTest = new Button {
            Text = "MyButton",
            BackgroundColor = Color.FromHex ("ff0000"),
            TextColor = Color.White,
            HorizontalOptions = LayoutOptions.Center,
            VerticalOptions = LayoutOptions.Start,
            WidthRequest=200,
        };

        btnTest.SetBinding (Button.CommandProperty, "BtnTestCommand");

        stack.Children.Add (header);
        stack.Children.Add (btnTest);
        stack.Children.Add (lblA);
        stack.Children.Add (lblB);
        Content = stack;


    }
}

}
`