Group tree generation timeouts when you have a massive amount of groups

[beerbohmdo]

Description

In the getCMSFields function of Member there is a loop over all groups which create a tree like representation.

https://github.com/silverstripe/silverstripe-framework/blob/5/src/Security/Member.php#L1376

I program a sass platform which allowes the customers to create groups for their users. And now I am unable to open the Security section of the admin because of the function call above.

I don't know if the TreeDropdownField would be a better replacement or if that have similar issues.

Currently I cannot even disable the code by removing the DirectGroups field because the code directly runs inside the getCMSFields function.

Additional context or points of discussion

No response

Validations

• You intend to implement the feature yourself
• You have read the contributing guide
• You strongly believe this feature should be in core, rather than being its own community module
• You have checked for existing issues or pull requests related to this feature (and didn't find any)

[GuySartorelli]

Thanks for reporting - checking TreeDropdownField would definitely be the first thing I'd recommend trying. Would you like to investigate further and look at raising a PR to fix this?

[beerbohmdo]

The TreeDropdownField is only for single values, thats maybe the reason why it not used here.

Currently it is a ListboxField. So a SearchableMultiDropdownField with a custom label should work. I will try that.

[GuySartorelli]

There's an implementation of tree dropdorn that accepts multiple values. But yup searchable might work.

[beerbohmdo]

I tried the Tree Field but it realy slow too and does not even load the subtree.

PR is open #11578