Grid scrolling performance

I have a large editable grid, with a mix of header filters and footer sums.
The grid has 300 columns and approx 500 rows and is attached within a layout cell. The first 5 columns are fixed so do not scroll.

The scrolling performance of the grid is very slow. It updates once or twice a second when I try to scroll, which makes it very difficult to scroll to a column or row.

Are there any tips or suggestions that could make this faster?

Hello.

Unfortunately in case of such big number of columns there is no possibility to increase the performance of a grid rendering.