Range selection in TTMSFNCGrid

If I select a range in Excel (or in a standard TStringGrid) I can move the mouse around as quickly as I want and the range re-sizes instantaneously. In the FNCGrid however, there is an annoying lag in the selection re-size as the number of cells in the selection gets large. For example, in full screen with 25 columns and 45 rows performance is fine up to around 500 selected cells then it starts to lag noticeably. Is there any way to improve this?

This is for a grid dropped on a form and no event handlers activated. Using Delphi 10.2 and FNC UI 2.5.1.

Thanks, Bob


We are not able to reproduce this issue here. We have no delay when testing this with a default grid on the form, setting the columncount to 25 and the rowcount to 45. Please send us a sample with step by step instructions on how to reproduce the issue.
Sorry - false alarm - it only occurs in debug mode, release is fine.

Cheers, Bob