2018-07-19: Updating an issue is very slow / times out
cc @jarv
When an issue contains many (say, 100) ToDo items, updating it is really slow.
For instance, checking any of ToDo checkboxes takes dozens of seconds (see the PATCH request):
– 17.8 seconds for that PATCH request. This screenshot was taken few minutes ago on this page: NikolayS/my-awesome-project#1, 100 ToDo items.
For small lists, requests are still slow but much faster, see for example NikolayS/my-awesome-project#1 with 5 ToDos – the PATCH took 1.2 sec:
Sometimes, it reaches 60 sec timeout and fails with 502 error (w/o any noticeable UI changes), I've noticed it multiple times during July 16-18:
Editing & saving the issue's description is also slow (see PUT request):
Related frontend issue: https://gitlab.com/gitlab-com/production/issues/332