Bad performance on page loading

Hello!
I have a performance issue on loading groups with hundred of password.
The first time I load the page, the loading take a long time, and on the server I can see the process “mysqld” with 100% of CPU.
The server have 2 cores, but mysqld occupy only 1.

I’ve read some old topic about a fix that correct an issue like this, but it seems ineffective on my system.
I have version 2.10.0

Thank you very much

Hello @SysGI,

Can you check your browser console network tab and report back the information about slow requests, this will help us understand which request is slow and how long it takes.