Comment 2 for bug 1817604

Currently being addressed in this patch:
https://review.openstack.org/#/c/639420/

Some performance metrics.

Action Old Timing New Timing
list 0m11.050s 0m9.163s
action list 1m2.214s 0m17.405s
node list 0m7.397s 0m6.416s
show x 0m8.410s 0m5.098s
action show x 0m5.454s 0m5.110s
node show x 0m7.647s 0m5.029s
policy list 0m5.490s 0m3.946s
policy show x 0m5.485s 0m3.618s