UsersDisp.aspx take more than 1 minute with 10.000 users

Hi everyone, I am using the FBA project, it's great and complete in my oppinion. But I facing a problem with administering more than 10.000 users. When I try to access the administration page, the IE, Chore or Firefox show a blank page for one minute and few seconds. How can I solve this problem? Thanks in advance
This is a known issue. The problem is that the list of users is a combination of data from the membership database and from SharePoint - so everything has to be grabbed and then put together in memory. This is very slow if there are a lot of users. There's an issue raised to look at this for the next release: