LDAP Capacity? (300K+ users?)

We're running into some performance problems using LdapContrib against an ldap server that has over 300K user entries.

In particular, we're seeing the view process take 100% cpu and never complete, and the logs show numerous perl "deep recursion" errors.

This doesn't happen on every page. Main and System are fine, but the Sandbox shows the problem. I think it's the search function that's part of the default Sandbox page that triggers the problem and I wonder if it's related to checking perms on the search results?

The cache rebuilds successfully, but after finishing, the process keeps running, and goes from ~40% cpu to 100%.

I can provide more details, but wanted to start with the question: has anyone used LdapContrib against an ldap server this size?

thanks!

UPDATE: 20150106

Is there any further information I can provide such that you might be able to offer any insight into why I'm having this issue? Thanks!

Commenting is disabled while not logged in