From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Hugo Manrique <hugmanrique@gmail.com>
Date: Mon, 23 Jul 2018 12:57:39 +0200
Subject: [PATCH] Option to prevent armor stands from doing entity lookups


diff --git a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
index 68ac3ffae5d800bde3c5b5163a52768a43bb5963..a59381646031a1a99c98c8c6ad9de7efc96b774a 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -337,6 +337,7 @@ public class ArmorStand extends LivingEntity {
 
     @Override
     protected void pushEntities() {
+        if (!this.level().paperConfig().entities.armorStands.doCollisionEntityLookups) return; // Paper
         List<Entity> list = this.level().getEntities((Entity) this, this.getBoundingBox(), ArmorStand.RIDABLE_MINECARTS);
 
         for (int i = 0; i < list.size(); ++i) {
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index ce24a52b2b9fb0ae7cfb085a204de8780bc8f5d6..0b02ba70956ea1352ea8e67957b3789408b67f6b 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -849,6 +849,13 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
             // Paper end
         }
     }
+    // Paper start - Prevent armor stands from doing entity lookups
+    @Override
+    public boolean noCollision(@Nullable Entity entity, AABB box) {
+        if (entity instanceof net.minecraft.world.entity.decoration.ArmorStand && !entity.level().paperConfig().entities.armorStands.doCollisionEntityLookups) return false;
+        return LevelAccessor.super.noCollision(entity, box);
+    }
+    // Paper end
 
     public boolean shouldTickDeath(Entity entity) {
         return true;