Performance tip 1 is to choose a good WordPress host for more computing power
This site is hosted by SiteGround. It’s part of a cloud reseller plan with 4+1 CPUs, 8+3 GB RAM and enough SSD disk space to support the sites which are implemented on it.
When I started the performance tests I turned off the dynamic caching. Now I’m re-enabling some of the optimization logic that’s offered by the SG Cache plugin.