Some things I would take a look at;
Hello Poonam,
I am afraid it is way to much data that needs to be displayed.
However, small things that you can do are the following:
1. Try instead of using a tab container more something like a menu, it could be possible that with the tab container Mendix is loading all the tables of every tab although you only visiting one tab
2. Limit / Cluster your conditional visibility
3. If you have calculated attributes try to replace them with OCh events or Commit events
Hope this helps!
Good luck