So now due to the caching system, I have:
First load after RR plugin validation: 16sec
CTRL+F5 load: 4sec
(with a load message .temp/cache/R_Stats_%D0%9C%D0%B0%D0%B9%D0%BD%D0%B0/6d0b8396d6a7b97602e43bbfc3993451_1.png)
F5 load: 3.5sec
What is really better than the previous 12sec I had on a F5 reload.