Improve performance of chunk saving

src/main/java/org/dimdev/jeid/mixin/core/world/MixinStateImplementation.java

@@ -0,0 +1,36 @@
+package org.dimdev.jeid.mixin.core.world;
+
+import com.google.common.collect.*;
+import java.util.*;
+import net.minecraft.block.properties.*;
+import net.minecraft.block.state.BlockStateContainer.*;
+import org.spongepowered.asm.mixin.*;
+import org.spongepowered.asm.mixin.injection.*;
+import org.spongepowered.asm.mixin.injection.callback.*;
+
+@Mixin(StateImplementation.class)
+public class MixinStateImplementation {
+
+    private int hashCodeValue;
+
+    @Shadow
+    private ImmutableMap<IProperty<?>, Comparable<?>> properties;
+
+    @Inject(
+        method = "<init>",
+        at = @At("RETURN")
+    )
+    private void initHashCode(CallbackInfo ci) {
+        hashCodeValue = Objects.hash(this, properties);
+    }
+
+    /**
+     * @author hohserg
+     * @reason it should just return value. kinda have no sense to @Inject
+     */
+    @Overwrite
+    public int hashCode() {
+        return hashCodeValue;
+    }
+
+}

src/main/resources/mixins.jeid.core.json

@@ -21,6 +21,7 @@
     "world.MixinChunkPrimer",
     "world.MixinChunkProviderServer",
     "world.MixinGenLayerVoronoiZoom",
+    "world.MixinStateImplementation",
     "world.MixinWorldInfo"
   ],
   "client": [