UI Thread Optimization

Question

While loading the below page throw navigation. While clicking navigation item it takes 2 secs and then it navigates. After verfiying and clearing everything in .cs file still the same time persists between navigation. Is it because of more user controls being rendered ?. If so how can i make UI thread accessible without hanging

<Page>

<Grid x:Name="InvoicesViewGrid" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" >
    <Grid x:Name="PrintContainer"  Visibility="{x:Bind ViewModel.IsEditView,Mode=OneWay,Converter={StaticResource BoolToVisibilityReverseConverter}}">
        <Grid.ColumnDefinitions>
            <ColumnDefinition x:Name="ListColumn" Width="{x:Bind ViewModel.ListWidth,Mode=OneWay}" />
            <ColumnDefinition x:Name="DetailColumn" Width="{x:Bind ViewModel.DetailWidth,Mode=OneWay}" />
        </Grid.ColumnDefinitions>

        <!--Invoices-->
        <Grid>
            <views:InvoicesList ViewModel="{x:Bind ViewModel.List,Mode=OneWay}" />
        </Grid>
        <!--Details-->
        <Grid Grid.Column="1" x:Name="DetailsGrid" Visibility="{x:Bind ViewModel.IsDetailView,Mode=OneWay}">
            <views:InvoiceDetails ViewModel="{x:Bind ViewModel.Details,Mode=OneWay}" />
            <controls:OfflineStateDetail Visibility="{x:Bind ViewModel.IsDataNotAvailableInOffline, Mode=OneWay}"></controls:OfflineStateDetail>
        </Grid>
        <Grid Grid.Column="1" x:Name="EmailGrid" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Visibility="{x:Bind ViewModel.IsEmailView,Mode=OneWay}">
            <views:EmailView  ViewModel="{x:Bind ViewModel.Email,Mode=OneWay}"></views:EmailView>
        </Grid>
        <Grid Grid.Column="{x:Bind ViewModel.PaymentGridColumn, Mode=OneWay}" Grid.ColumnSpan="2" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Visibility="{x:Bind ViewModel.IsPaymentView,Mode=OneWay}">
            <views:PaymentsReceivedEdit  ViewModel="{x:Bind ViewModel.PaymentEdit,Mode=OneWay}"></views:PaymentsReceivedEdit>
        </Grid>
    </Grid>
    <Grid x:Name="EditGrid"  Visibility="{x:Bind ViewModel.IsEditView,Mode=OneWay}" Background="Transparent">
        <views:InvoiceEditView ViewModel="{x:Bind ViewModel.Edit}" Visibility="{x:Bind ViewModel.Edit.IsRetailView,Mode=OneWay,Converter={StaticResource BoolToVisibilityReverseConverter}}" />
        <views:RetailInvoiceView ViewModel="{x:Bind ViewModel.Edit}" Visibility="{x:Bind ViewModel.Edit.IsRetailView,Mode=OneWay}" />
    </Grid>
    <views:ShippingBill x:Name="ShippingBillGrid" ViewModel="{x:Bind ViewModel.ShippingBillViewModel,Mode=OneWay}" Visibility="{x:Bind ViewModel.IsShippingView,Mode=OneWay}"></views:ShippingBill>
</Grid>

</Page>