hilltty-flags VS JMT-MCMT

Like others said, don't allocate all the ram the server has to the jvm with the -xmx, but since you were asking for flags, I've been using Hilltty flags, and they work like wonders. Here's the link https://github.com/hilltty/hilltty-flags/blob/main/english-lang.md

My opinion, Aikar's flags are still the safe bet. Feel free to experiment though: https://github.com/hilltty/hilltty-flags/blob/main/english-lang.md

Also use hilltty-flags with Temurin JDK 17 (or any other JDK that supports Shenandoah Garbage Collector) for better performance.

Also for better performance on all cores use hilltty-flags with Temurin JDK 17 (that supports Shenandoah Garbage Collector)

Well, if you can't find another datapack and don't want to go the way of creating custom arrows, you can try to optimize your server as much as possible. Instead of PaperMC, use Pufferfish, install Temurin JDK 17 and run your server with startup flags from hilltty, based on the Shenandoah garbage collector. Also, following this guide, optimize the values in the configuration files (like paper.yml).

This pc is made only to run mc servers. So I ask you as a smooth brain mega pleb, is it possible to use more cores for a server? https://www.curseforge.com/minecraft/mc-mods/mcmt-multithreading/

https://www.curseforge.com/minecraft/mc-mods/mcmt-multithreading this could help

ah yeah that's what i meant. so yes it's only using 4 cores. you may be able to spread it over more cores. using for example - https://www.curseforge.com/minecraft/mc-mods/mcmt-multithreading

Then there is this mod https://www.curseforge.com/minecraft/mc-mods/mcmt-multithreading this looks like its geared more toward the sever side of things it can be used in single player as well. It won't increase frame rate however.

• Dimensional Threading

There are a few mods that have tried this before such as MCMT and C2ME (fabric), but they are quite unstable so I can't really recommend them. Minecraft isn't completely single threaded, the game runs an integrated server on a separate thread to the render among other things like networking, but it is still not very good.