burli wrote:Hi, I want to know which type of mod has an impact to the fps, to the server, to both or has no effect
For example mobs, mapgens, mods like ambience, plantlife...
This is a highly complex question. Let's split it out:
1) fps impact
fps is determined by the capability of your client to draw the scene. So, make your scene more complex, and it could affect FPS. Stuff that makes scenes complex (mesh nodes or mobs) could impact FPS. And so does large textures (but they'd have to be insanely large, like 1024x1024 or larger, for most people to even begin to have an issue).
Conclusion: So, in the end, only very little mods make an impact here. Lots of mobs is probably the one thing to make an issue. If you have a really old GPU, then more things may impact fps.
Reducing your view range down from 250 to 100 has 1000x more impact on fps than mobs, or any mod.
2) lag impact
This is impacted by the capability of your server to send you events. More connected players, more stuff changing on the map, and the worse this is.
Server-side mods all cause events. These events need to be sent. The more needs to be sent, the worse lag.
Conclusion: all mods increase lag, probably. The ones that cause lots of node changes cause the most.
3) server impact
The server is very, VERY, low overhead. As long as you have a reasonable CPU, the server will be happy. The one thing that can ruin your day is if there is not enough RAM for the server.
Your server will run better on a machine with 4gb ram. Less RAM? expect issues.
Conclusion: only RAM really matters when it comes to the server performance.
Each of these topics I could probably go into a lot of detail, but the above 3 points should be a good guideline as to how certain mods affect performance aspects in the game.