Comment 29 for bug 1582585

Tests completed below with 12,500 users in ldap tree

=== Mitaka Results ===

$ dpkg -l | grep keystone
ii keystone 2:9.3.0-0ubuntu3.1 all OpenStack identity service - Daemons

$ time openstack user list --domain userdomain
...
real 2m3.608s
user 0m6.848s
sys 0m0.548s

==== Mitaka Proposed ====
$ dpkg -l | grep keystone
ii keystone 2:9.3.0-0ubuntu3.2 all OpenStack identity service - Daemons

$ time openstack user list --domain userdomain
...
real 0m16.695s
user 0m6.708s
sys 0m0.328s

=== Newton Results ===

$ dpkg -l | grep keystone
ii keystone 2:10.0.3-0ubuntu1~cloud0 all OpenStack identity service - Daemons

$ time openstack user list --domain userdomain
...
real 0m22.626s
user 0m6.232s
sys 0m0.492s

=== Newton-Staging Results ===

$ dpkg -l | grep keystone
ii keystone 2:10.0.3-0ubuntu1~cloud1 all OpenStack identity service - Daemons

$ time openstack user list --domain userdomain
...
real 0m16.297s
user 0m8.692s
sys 0m0.452s