For performance related issues like slow page load, you'll typically want to open a support case. UI slowness is hard to diagnose via the forum.
Some things to check
From UI:
any errors if you open up chrome tools or firebug?
From CLI:
# less /var/log/httpd/error_log (or tail log and try to navigate to that list view again)
Often times it can just be a temporary lock in the database that causes the stall.