I think this is the ironic lesson: for many sites, optimizing for consistent performance (i.e. CDN, geographic caching) is a more important objective than prematurely optimizing for a subset of users.
Example:
Business A - average render time 0.3s, but under load 5-10s
Business B - average render time 0.8s, but under load 1-2s.
Subjectively, around ~10s response time is the point I would close the tab and look for another business if I was trying to do shopping online, anything involving a credit card etc.
Example:
Business A - average render time 0.3s, but under load 5-10s
Business B - average render time 0.8s, but under load 1-2s.
Subjectively, around ~10s response time is the point I would close the tab and look for another business if I was trying to do shopping online, anything involving a credit card etc.