I have a hierarchy dataGrid with 5K rows x 13 columns. My grid is editable in cell mode. When I editing (into the cell) and change of focus out of de grid, or type “enter” without changes, it takes too long to return control. When the cell take changes the Grid work fine.
Please, make sure that your Grid is not with height: auto. When height is auto the grid creates UI row for each Data row. Otherwise, it uses virtualization i.e reuses the UI rows. Also make sure that you do not have a logic in editing/updating events which requires loops through all rows. This thing may slow down the Grid.
.
