Proposal: Lower server response time performance target to 200ms
Currently our ultimate server endpoint P90 TTFB response time target is 500ms.
This was a good target for us initially, with numerous performance improvements achieved, but as we continue to make GitLab's performance best in class we may want to explore a new stronger target moving forward to assist this.
500ms was selected as a good target that's at the top end of general acceptability for server TTFB response time. Researching online it's suggested to target between 100ms to 500ms, with the lower the better. PageSpeed Insights (Google) has suggested 200ms or less for server response time (that's corroborated in other articles) so this may be a good value for us to target.