I have a grid with 18 columns of which are only 3 are editable. ( 3 ReadOnly - 3 Editable - 12 ReadOnly)
The grid is bound to a viewmodel via ItemsSource.
So the other columns (GridViewDataColumn) are set to IsReadOnly="True" and TabStopMode="Skip"
If the user enters data there is a delay of 1-1.5 sec after the last editable cell (when the selection goes over the 15 non-selectable cells and goes to the next row)
If I add columns the problem get even worse.
[The Telerik.Windows.Controls.GridView version is 2018.1.220.45]