We have been experiencing this problem for some time but it is getting worse each day. We even looked at Jira alternatives already but besides performance Jira is doing the job well.
Issues are really slow to load most of the time! Sometimes timeout error dialog pops up, otherwise it takes tens of seconds to load issues, navigate view etc.
Check below how long it takes for some requests to finish.

We migrated to cloud from on-premises installation to have frequent updates and get moust out of Jira but I start to regret it as clearly oversubscription on Jira Cloud is set to a ridiculously high instance per server value.
Is it the common problem for others, the way things just should work? Or is it affecting only our Jira installation as we have a team of less than 10 people using Jira on a daily basis?