Reduce chunk loading & lookups

divinemc-server/minecraft-patches/features/0054-Reduce-chunk-loading-lookups.patch

@@ -0,0 +1,44 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
+Date: Wed, 11 Jun 2025 19:12:00 +0300
+Subject: [PATCH] Reduce chunk loading & lookups
+
+Original license: GPL v3
+Original project: https://github.com/pufferfish-gg/Pufferfish
+
+diff --git a/net/minecraft/world/entity/monster/EnderMan.java b/net/minecraft/world/entity/monster/EnderMan.java
+index c7cc8e1277bbfa8bcac596a5043e418cb1567971..146826c99a410bef2afd5ed055b40a6ae6b38701 100644
+--- a/net/minecraft/world/entity/monster/EnderMan.java
++++ b/net/minecraft/world/entity/monster/EnderMan.java
+@@ -334,11 +334,28 @@ public class EnderMan extends Monster implements NeutralMob {
+     private boolean teleport(double x, double y, double z) {
+         BlockPos.MutableBlockPos mutableBlockPos = new BlockPos.MutableBlockPos(x, y, z);
+ 
+-        while (mutableBlockPos.getY() > this.level().getMinY() && !this.level().getBlockState(mutableBlockPos).blocksMotion()) {
+-            mutableBlockPos.move(Direction.DOWN);
++        // DivineMC start - Reduce chunk loading & lookups
++        BlockState blockState;
++        if (org.bxteam.divinemc.config.DivineConfig.PerformanceCategory.reduceChuckLoadAndLookup) {
++            net.minecraft.world.level.chunk.LevelChunk chunk = this.level().getChunkIfLoaded(mutableBlockPos);
++            if (chunk == null) {
++                return false;
++            }
++
++            while (mutableBlockPos.getY() > this.level().getMinY() && !chunk.getBlockState(mutableBlockPos).blocksMotion()) {
++                mutableBlockPos.move(Direction.DOWN);
++            }
++
++            blockState = chunk.getBlockState(mutableBlockPos);
++        } else {
++            while (mutableBlockPos.getY() > this.level().getMinY() && !this.level().getBlockState(mutableBlockPos).blocksMotion()) {
++                mutableBlockPos.move(Direction.DOWN);
++            }
++
++            blockState = this.level().getBlockState(mutableBlockPos);
+         }
++        // DivineMC end - Reduce chunk loading & lookups
+ 
+-        BlockState blockState = this.level().getBlockState(mutableBlockPos);
+         boolean flag = blockState.blocksMotion();
+         boolean isWater = blockState.getFluidState().is(FluidTags.WATER);
+         if (flag && !isWater) {

divinemc-server/src/main/java/org/bxteam/divinemc/config/DivineConfig.java

@@ -331,6 +331,7 @@ public class DivineConfig {
         public static boolean useCompactBitStorage = false;
         public static boolean commandBlockParseResultsCaching = true;
         public static boolean sheepOptimization = true;
+        public static boolean reduceChuckLoadAndLookup = true;
         public static boolean hopperThrottleWhenFull = false;
         public static int hopperThrottleSkipTicks = 0;
 
@@ -437,6 +438,8 @@ public class DivineConfig {
                 "Caches the parse results of command blocks, can significantly reduce performance impact.");
             sheepOptimization = getBoolean(ConfigCategory.PERFORMANCE.key("optimizations.sheep-optimization"), sheepOptimization,
                 "Enables optimization from Carpet Fixes mod, using a prebaked list of all the possible colors and combinations for sheep.");
+            reduceChuckLoadAndLookup = getBoolean(ConfigCategory.PERFORMANCE.key("optimizations.reduce-chunk-load-and-lookup"), reduceChuckLoadAndLookup,
+                "If enabled, optimizes chunk loading and block state lookups by reducing the number of chunk accesses required during operations such as Enderman teleportation.");
 
             hopperThrottleWhenFull = getBoolean(ConfigCategory.PERFORMANCE.key("optimizations.hopper-throttle-when-full.enabled"), hopperThrottleWhenFull,
                 "When enabled, hoppers will throttle if target container is full.");