Comment 2 for bug 1726955

for some more information, 'glance' is similarly slow.
We do have a large number of images (~4500).

$ time sstack glance --debug image-list >glance.log 2>&1

real 1m58.700s
user 0m4.506s
sys 0m0.413s

$ grep "GET.call" glance.log | wc -l
226

$ grep '^|' glance.log | wc -l
4476