[Bug]: Administrative Account Page hangs when having many (ldap-)groups

[someone-somenet-org]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

During testing the migratability of a bigger owncloud instance to nextcloud i encountered an issue that the Administrative Account Page will not load, in the form that the tab will hang indefinitely or crash.

It seems that something goes awry with "too many" groups.

(10000 LDAP/AD-users, 15000 LDAP/AD-groups and 10 local-db-users, 500 local-db-groups; most of which are dead/inactive)

Steps to reproduce

1. Have 10000 LDAP/AD-users, 15000 LDAP/AD-groups + 10 local-db-users, 500 local-db-groups
2. Open https://.../index.php/settings/users
3. Tab hangs or crashes.

Disable LDAP-Groups (set group filter to for example (&(|(objectclass=groupp))))

1. Have 10000 LDAP/AD-users, 0 LDAP/AD-groups + 10 local-db-users, 500 local-db-groups
2. Open https://.../index.php/settings/users
3. Tab loads after a while.

Expected behavior

The Tab to load always.

Nextcloud Server version

30

Operating system

RHEL/CentOS

PHP engine version

PHP 8.2

Web server

Apache (supported)

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

No response