I have 155 registered users on owncloud. Also I have 200 groups.Many users belong to many groups. When I open users page on firefox mozilla I must wait page to be displayed. But after few seconds I see Warning: Unresponsige script.
My suggestion is to display users into pages, and maximum 30 users per page.
I have tested this on my computer with 4GB RAM, and server is Xeon with 16GB RAM.
When I open users page with google chrome, I also wait about 25s, and page will be displayed without problem.
I am very grateful for your understanding and hope that you will accept my suggestion to make the changes to display users into pages.