WPF is rendering data very slowly - wpf

Question

More than 8000 objects are getting binded to ListView control and a object has two properties.ie ID and Description).
LstViewTextBLocks is a Listview control whose itemsource is assigned to 'view' which is of type ICollectionView
Data gets loaded fast in codebehind(as noticed in debugging) but while rendering the data it takes almost 6 minutes and also when the data is rendered while scrolling through it becomes very laggy.
<TabItem Header="data" Background="Gray" Name="textPicker" >
<!--<local:TextPickerView/>-->
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label DockPanel.Dock="Left" Content="Filter:" Grid.Column="0" Grid.Row="0"/>
<TextBox Name="TextblockFilter1" Grid.Row="0" Grid.Column="1"
Text="{Binding TextSearch,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" />
<ScrollViewer Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2"
VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
<**ListView** Name="LstViewTextBLocks"
VirtualizingStackPanel.VirtualizationMode="Recycling" SelectionMode="Single"
VirtualizingPanel.IsVirtualizing="True" IsSynchronizedWithCurrentItem="True"
SelectedItem="{Binding SelectedItem,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}">
<ListView.View>
<GridView>
**<GridViewColumn Header="ID" Width="Auto" DisplayMemberBinding="{Binding ID}" />
<GridViewColumn Header="Description" DisplayMemberBinding="{Binding Description}" />**
</GridView>
</ListView.View>
</**ListView**>
</ScrollViewer>
</Grid>
</TabItem>
ItemsSource of my listview in the code behind was set like this:
this.LstViewTextBLocks.ItemsSource = this.View;

Answer 1

Remove the ScrollViewer from your code. This ScrollViewer allows for the ListView to occupy all the height it needs for your 8000+ rows. This results in removing the virtualization from the ListView. ListView has its own Scrollviewer which will be triggered in, and will also help in virtualization and fast performance comparatively.
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label DockPanel.Dock="Left" Content="Filter:" Grid.Column="0" Grid.Row="0"/>
<TextBox Name="TextblockFilter1" Grid.Row="0" Grid.Column="1"
Text="{Binding TextSearch,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}" />
<ListView Name="LstViewTextBLocks"
Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2"
VirtualizingStackPanel.VirtualizationMode="Recycling" SelectionMode="Single"
VirtualizingPanel.IsVirtualizing="True" IsSynchronizedWithCurrentItem="True"
SelectedItem="{Binding SelectedItem,UpdateSourceTrigger=PropertyChanged,Mode=TwoWay}">
<ListView.View>
<GridView>
<GridViewColumn Header="ID" Width="Auto" DisplayMemberBinding="{Binding ID}" />
<GridViewColumn Header="Description" DisplayMemberBinding="{Binding Description}" />
</GridView>
</ListView.View>
</ListView>
</Grid>