Hierarchy GridView is not working for huge children capacity

[Aleksey]

RadGridView has slow performance if grid with hierarchical data has huge children capacity (e.g. 2000 children for each node).
I'm waiting a lot of time for expand node, very slow scroll, application brings up a lot of memory.

[Aleksey]

I attached example from SDK examples with one node and 2000 children - you can see slow performance for expand, scroll and etc.

[Dinko | Tech Support Engineer]

Hello Aleksey,

Thank you for the provided project.

Generally, such performance issues would be expected. When a HierarchyChildTemplate is defined, there is no way for the control to be aware of what is applied within the custom DataTemplate. In such a case the child grid is being measured with infinity, meaning that its virtualization mechanism is turned off. You can try setting a fixed Height, or MaxHeight of the child instance of RadGridView to ensure that the virtualization is not affected. Please take a look at the Degraded Performance topic for more information on this matter.

Regards,
Dinko
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