RadGridView CPU usage on mouseover

[Evgeny]

Hi, I'm using Telerik RadControls for WPF v.2012.3.1017.45 and use RadGridView in the following configuration:

<telerik:RadGridView Grid.Row="1" Grid.Column="0" x:Name="listView"
                     EnableRowVirtualization="True"
                     MouseDoubleClick="ListViewMouseDoubleClick"
                     SelectionChanged="ListViewSelectionChanged"
                     AutoGenerateColumns="False"
                     AlternateRowBackground="#3d3D3d3d"
                     Background="#99333333"
                     SelectedItem="{Binding SelectedItem, Mode=TwoWay}"
                     ItemsSource="{Binding VirtualizedItems}"
                     IsSynchronizedWithCurrentItem="True"
                     DataLoadMode="Asynchronous"
                     RowDetailsVisibilityMode="Collapsed"
                     ShowGroupPanel="False"
                     IsReadOnly="True"
                     CanUserSortColumns="True"
                     IsFilteringAllowed="False"
                     CanUserDeleteRows="False"
                     CanUserInsertRows="False"
                     Width="870" />

(columns are ommited, they are just databound to simple properties of one object).
Even simple mouse over causes serious peromance issues (up to 30% CPU usage from gridview application only) and bad user experience. When I moving over any other part of application - CPU usage is around zero. Any idea how to fix this? 

[Dimitrina]

Hello,

I have reviewed the definition of the RadGridView you have. Please remove the DataLoadMode="Asynchronous" setting. Generally using alternation will slow down the performance as well. You could check our online documentation for further hints on how to improve the performance.

All the best,
Didie
the Telerik team

[Evgeny]

Thank you for quick response. Unfortunately, your advice didn't help to improve mouseover perfomance. However, I found what causes such serious perfomance hit - it's a DropShadowEffect on the border I put RadGridView in. After removing this effect grid view becomes much more responsive and do not consume CPU resourses. Can't believe simple shadow has such effect on perfomance, but that's it. Maybe you should add this knowledge to the online documentation section you provided above.