[gamer_kanelita]

Lately my server is a bit slow, I play it on a local server, what advice would you give me or files so that my server is lighter and does not slow down? : 3

[Marttt]

Check if there are not many common infected spawned, having more than 30 can make the server start to lag.
The best advice would be: remove some plugins and check if some of then are lagging, some plugins have performance issues.

[HarryPotter]

Or consider dedicated server...