Comment by acdha

I mean, it really is everything. If it were my project I’d make sure I have telemetry on all UI actions and would then set a threshold (say 200ms), triage everything which has a percentile consistently over that threshold to look for easy fixes, and then set a policy that each release only improves on those numbers. I can’t think of any user-visible changes to Jira or Confluence in the last 5 years which I wouldn’t trade in a heartbeat for good performance.