Tree Control - Performance

Hi,

Am using a tree control in our web application created using

class - CL_GUI_LIST_TREE with checkbox items.

When a user 'checks' the item , it went to hourglass for 2 to 3 mins.

Can you please let me know, is there any fine tuning is required

at code level or is there any parameter setting at ITS Level.

We are in ITS 620 and R3 4.7.

Thanks in advance,

Srini S