From 92f44d6c71b52e0f5b587f0f175470d325918b18 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Thu, 16 Apr 2026 14:35:28 -0400
Subject: [PATCH] Reapply "minecraft: tweak jvm args"

This reverts commit 82a383482e1c534d1793c021a6d85a5e441f4870.
---
 services/minecraft.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/services/minecraft.nix b/services/minecraft.nix
index d002d4d..ea201cf 100644
--- a/services/minecraft.nix
+++ b/services/minecraft.nix
@@ -43,9 +43,15 @@
         # Memory
         "-Xmx${builtins.toString service_configs.minecraft.memory.heap_size_m}M"
         "-Xms${builtins.toString service_configs.minecraft.memory.heap_size_m}M"
+
         # GC
         "-XX:+UseZGC"
         "-XX:+ZGenerational"
+
+        # added in new minecraft version
+        "-XX:+UseCompactObjectHeaders"
+        "-XX:+UseStringDeduplication"
+
         # Base JVM optimizations (brucethemoose/Minecraft-Performance-Flags-Benchmarks)
         "-XX:+UnlockExperimentalVMOptions"
         "-XX:+UnlockDiagnosticVMOptions"
@@ -67,6 +73,7 @@
         "-XX:NonProfiledCodeHeapSize=194M"
         "-XX:NmethodSweepActivity=1"
         "-XX:+UseVectorCmov"
+
         # Large pages (requires vm.nr_hugepages sysctl)
         "-XX:+UseLargePages"
         "-XX:LargePageSizeInBytes=${builtins.toString service_configs.minecraft.memory.large_page_size_m}M"