minecraft: tweak jvm args

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"