hilltty-flags VS hydrogen-fabric

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).

• Hydrogen;

1) LazyDFU: Compiled DFU rules afterwards. 2) EntityCulling: Doesn't render entities that you can't see 3) NoFade: This isn't exactly a performance mod, but fading sometimes makes my game crash, so I use this. 4) NotEnoughCrashes: Again, not a performance mod, but makes crashes much easier to handle. 5) SmoothBoot: Makes Minecraft not hog too many resources when starting up 6) SodiumExtra: Basically adds more options to Sodium. 7) Hydrogen: idk how to describe this (I no longer don't use this as 1.18 hasn't released yet, but I'll this in anyway). 8) C2ME: Improves chunk performance. 9) Enchanced Block Entities: Improves rendering of block entities. Note that this only really shows effect when you're in an area with tons block entities (eg. your storage basement)

I would suggest you to use Sodium or Iris - Overall Performance Improvement / Iris If You Wanna Use Shaders Too Lithium - Improve CPU Usage LazyDFU - Launch Game Faster Phosphor - Improve Light Engine Hydrogen - Reduce Memory Usage

Try Entity Culling and Hydrogen

Hydrogen: https://github.com/CaffeineMC/hydrogen-fabric/releases, download the latest jar

for newer versions Sodium+Lithium+Phosphor (+aditionally hydrogen)

You forgot about Hydrogen.

(Experimental) Hydrogen ( CaffeineMC/hydrogen-fabric )