XHR responds 2-3s on other server 500-600ms ubuntu miracle?

[c64girl]

I have a qestion about system that prestashop need to be run on. I have tested 10 server all of them that run on ubuntu works with no problem. The XHR requests (add to basket, remove from basket, next step in checkout, checkout finalization) working slow on other systems than ubuntu. Check screenshots faster is ubuntu slower centos.

The copy is 1/1 files and database. So there is no chance something is wrong. I tested clean installation of prestashop and it seems on no ubuntu server it have XHR 800ms on ubuntu 100-200ms max.

 

Anyone can explain me this? In first i was thinking some configurations is the problem. But changing whole system and putting my old store there give me an answer system is important too.

 

Edited January 10, 2023 by c64girl (see edit history)