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/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index f0b2c5ae854ee7f3321b2b39a3680af5c747732e..7372f826b346bf684eb5987dedb4b907076ef2c0 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -435,4 +435,9 @@ public class PaperWorldConfig {
     private void scanForLegacyEnderDragon() {
         scanForLegacyEnderDragon = getBoolean("game-mechanics.scan-for-legacy-ender-dragon", true);
     }
+
+    public boolean armorStandEntityLookups = true;
+    private void armorStandEntityLookups() {
+        armorStandEntityLookups = getBoolean("armor-stands-do-collision-entity-lookups", true);
+    }
 }
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 ed698f3e3f9ed6003fe621c5f6f7e3a151a1a559..0923867d4730c9a7ed08d52bbc39b09871c8c806 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ArmorStand.java
@@ -336,6 +336,7 @@ public class ArmorStand extends LivingEntity {
 
     @Override
     protected void pushEntities() {
+        if (!level.paperConfig.armorStandEntityLookups) 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 1569c9249804de05b2650463f32a94d599ffd427..502734a44ee9f40eae983fed74348f3aa5a8f8b6 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -731,6 +731,13 @@ 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.armorStandEntityLookups) return false;
+        return LevelAccessor.super.noCollision(entity, box);
+    }
+    // Paper end
 
     public boolean shouldTickDeath(Entity entity) {
         return true;