Wow thank you. In the meantime I did get a redis on my server, followed a guide and got the object caching you speak of. It helps. I have no idea bout the workers, but I am def going to look into it. I am in <3 with code SEO since 1 week, studying relentlessly.
I was reading cloudflare has the fastest dns response, around 35ms while most other domain registrars are 100 or more. For that reason, I am transferring my domain to cloudflare for that fast DNS. Saving ~70ms per server request is great.
I am unfamiliar with the methods you mention, but im going to study and see how they work!
Thx again.