How to improve IE performance with client-side processing but without Deferred Rendering option.

Hello,
My problem is the following:
I have 2000 rows to display in my datatable with client-side processing AJAX or js_array.
I must use fnGetNodes () because of the application functionnality, so iI can't use the deferred rendering option.
How can I improve the IE performance with these constraints.
Currently, it displays 2000 rows in13s, that isn't acceptable for final users.
Thank you for your help
Regards
Alex