What kinds of (Fabric) mods negatively affect performance the most?

My server is struggling and I want to remove the main offenders. I plan to use Spark to help me identify, but just in general what sorts of mods would hurt performance most? If I had no knowledge I would guess that large world generation mods like Terralith or those that add lots of big structures would negatively affect performance, but I do know that if you pregenerate your world (which I have done), they actually don't negatively affect your performance that much afterwards. So what are the real culprits?
11 Replies
Admincraft Meta
Admincraft Meta9mo ago
Thanks for asking your question!
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Requested by lightningferix#0
lightningferix
lightningferixOP9mo ago
By kind I mean broad category such as "mods that add a bunch of animals to the game" or "mods that add lots of items and new blocks" etc
Skullians
Skullians9mo ago
Mods that add new content, such as new entities, worldgen. If they add functional blocks like create mod they definitely cause lag With terrain mods you should pregenerate
lightningferix
lightningferixOP9mo ago
new entities like new mobs? mods that add new items like weapons and armor should be less negatively impactful?
Skullians
Skullians9mo ago
new mobs yeah static blocks (by static I mean like new decorative blocks), yeah armor and weapons are less laggy compared to the things I listed
lightningferix
lightningferixOP9mo ago
sorry to clarify, static blocks, armor, and weapons are all less laggy? or only armor and weapons are less laggy but static blocks are more laggy?
Skullians
Skullians9mo ago
In general, those kind of things are less laggy compared to mods that add things like new mobs, terrain generation, etc they’re all going to contribute some lag, but some will lag more than others
lightningferix
lightningferixOP9mo ago
okay thank you! terrain generation mods though once i pregenerate shouldnt affect too much right?
Skullians
Skullians9mo ago
ofc make sure you install perf mods and have good hardware yeah, just make sure you set a worldborder so players don’t go beyond your pregen
lightningferix
lightningferixOP9mo ago
thank you!
Skullians
Skullians9mo ago
np!

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