I think you are also facing same problem as I had.
this is a known performance Issue with IG Grid having more then 1000 rows with around 5-8 columns,
you can refer to this case CAS-09408-5YNFAV
there is no resolution for this problem.
either reduce your size to 200 rows or face performance issue.
one nice solution can be you can use paging if possible in your case.
Hello Anand,
Thanks for sharing your solution. If you haven't done so already, I would recommend you take a look at our new WebDataGrid released with 2008 Volume 3. We have done a lot of performance improvements within this new grid control.
-Taz