Hello, Max,

Thank you for the example.

The difference in the rendering mainly occurs because, with the row filter, the Grid is creating an AutoComplete widget for every column. In cases like this where the columns are many, it  is creating 10+ additional widgets which is causing the additional delay.

If the performance is not acceptable we can suggest the other filter mode which will not make additional widgets on load and it will speed the performance.

We will still make more researches if the performance with filter mode row and a large number of a column can be optimized. If there is an optimization approach we will share it here for better visibility.


Regards,
Stefan
Progress Telerik