Hello experts,

    I have a question about the server group GET rest API. I tried out the GET API and found it was pretty slow (around 200 servers returned in 8 seconds). By skimming through the codebase I am suspecting filtering out group members is heavy (https://github.com/openstack/nova/blob/4100d4d8fbaa6416ea37d8cb3e64003f40ee1eb1/nova/api/openstack/compute/server_groups.py#L108

).

  So my question is do we clear out the instance_group_member table after deleting instances? If not, why could we not do it?  Thank you very much for help.

.