0016-Reduce-chunk-loading-lookups.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Paul Sauve <paul@technove.co>
Date: Thu, 4 Feb 2021 23:33:52 -0600
Subject: [PATCH] Reduce chunk loading & lookups

Airplane
Copyright (C) 2020 Technove LLC

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diff --git a/src/main/java/net/minecraft/world/entity/monster/EnderMan.java b/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
index 4e6b8f6afcbf4e84759a5ec07930717fb363613f..8d795d1bc125973caf0818224ea359c3cd3388a8 100644
--- a/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
+++ b/src/main/java/net/minecraft/world/entity/monster/EnderMan.java
@@ -342,11 +342,17 @@ public class EnderMan extends Monster implements NeutralMob {
     private boolean teleport(double x, double y, double z) {
         BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos(x, y, z);
 
-        while (blockposition_mutableblockposition.getY() > this.level.getMinBuildHeight() && !this.level.getBlockState(blockposition_mutableblockposition).getMaterial().blocksMotion()) {
+        // Pufferfish start - single chunk lookup
+        net.minecraft.world.level.chunk.LevelChunk chunk = this.level.getChunkIfLoaded(blockposition_mutableblockposition);
+        if (chunk == null) {
+            return false;
+        }
+        // Pufferfish end
+        while (blockposition_mutableblockposition.getY() > this.level.getMinBuildHeight() && !chunk.getBlockState(blockposition_mutableblockposition).getMaterial().blocksMotion()) { // Pufferfish
             blockposition_mutableblockposition.move(Direction.DOWN);
         }
 
-        BlockState iblockdata = this.level.getBlockState(blockposition_mutableblockposition);
+        BlockState iblockdata = chunk.getBlockState(blockposition_mutableblockposition); // Pufferfish
         boolean flag = iblockdata.getMaterial().blocksMotion();
         boolean flag1 = iblockdata.getFluidState().is((Tag) FluidTags.WATER);