Evaluate if we can use caching to improve performance

[ZeroPointEnergy]

Evaluate if we can get performance improvements by implementing some caching.

https://guides.rubyonrails.org/caching_with_rails.html

There where some attempts here which could give some hints: #292 #263 however this does not use the native Rails methods. The solution should be completely optional so we don't complicate small deployments which have no need for this.