WPF ItemsControl 卡顿 数据量大 虚拟化 优化

<ItemsControl ItemsSource="{Binding MemberInfos}"
             VirtualizingStackPanel.IsVirtualizing="True"　　　　VirtualizingStackPanel.VirtualizationMode="Recycling"　　　　　　　　VirtualizingPanel.CacheLength="50">
            <ItemsControl.ItemsPanel>
                <ItemsPanelTemplate>
                    <VirtualizingStackPanel></VirtualizingStackPanel>
                </ItemsPanelTemplate>
            </ItemsControl.ItemsPanel>
            <ItemsControl.Template>
                <ControlTemplate TargetType="ItemsControl">
                    <ScrollViewer VerticalScrollBarVisibility="Auto" CanContentScroll="True">
                        <ItemsPresenter></ItemsPresenter>
                        <ScrollViewer.Resources>
                            <Style TargetType="ScrollBar">
                                <Setter Property="Width" Value="6"/>
                                <Setter Property="MinWidth" Value="6"/>
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="ScrollBar">
                                            <Grid>
                                                <Rectangle Width="{TemplateBinding Width}" Fill="White"/>
                                                <Track x:Name="PART_Track" IsDirectionReversed="True">
                                                    <Track.DecreaseRepeatButton>
                                                        <RepeatButton Command="ScrollBar.LineUpCommand" Visibility="Collapsed"/>
                                                    </Track.DecreaseRepeatButton>
                                                    <Track.IncreaseRepeatButton>
                                                        <RepeatButton Command="ScrollBar.LineDownCommand" Visibility="Collapsed"/>
                                                    </Track.IncreaseRepeatButton>
                                                    <Track.Thumb>
                                                        <Thumb Background="#D3D7DD"/>
                                                    </Track.Thumb>
                                                </Track>
                                            </Grid>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </ScrollViewer.Resources>
                    </ScrollViewer>
                </ControlTemplate>
            </ItemsControl.Template>
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <local:MembersListItem/>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>