From d449dd493b3e46612bf2b0abdc33424e91458515 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Tue, 8 Mar 2016 23:25:45 -0500
Subject: [PATCH] Disable Scoreboards for non players by default

Entities collision is checking for scoreboards setting.
This is very heavy to do map lookups for every collision to check
this setting.

So avoid looking up scoreboards and short circuit to the "not on a team"
logic which is most likely to be true.

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index f3b4288..c47de89 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -269,4 +269,9 @@ public class PaperWorldConfig {
     private void disableTeleportationSuffocationCheck() {
         disableTeleportationSuffocationCheck = getBoolean("disable-teleportation-suffocation-check", false);
     }
+
+    public boolean nonPlayerEntitiesOnScoreboards = false;
+    private void nonPlayerEntitiesOnScoreboards() {
+        nonPlayerEntitiesOnScoreboards = getBoolean("allow-non-player-entities-on-scoreboards", false);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/CommandScoreboard.java b/src/main/java/net/minecraft/server/CommandScoreboard.java
index 871535c..25950bd 100644
--- a/src/main/java/net/minecraft/server/CommandScoreboard.java
+++ b/src/main/java/net/minecraft/server/CommandScoreboard.java
@@ -490,6 +490,7 @@ public class CommandScoreboard extends CommandAbstract {
 
                     while (iterator.hasNext()) {
                         Entity entity = (Entity) iterator.next();
+                        if (!entity.world.paperConfig.nonPlayerEntitiesOnScoreboards && !(entity instanceof EntityHuman)) { continue; } // Paper
                         String s2 = e(minecraftserver, icommandlistener, entity.getUniqueID().toString());
 
                         if (scoreboard.addPlayerToTeam(s2, s)) {
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index 100a5e0..8221b84 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1844,6 +1844,7 @@ public abstract class Entity implements ICommandListener {
     }
 
     public ScoreboardTeamBase aO() {
+        if (!this.world.paperConfig.nonPlayerEntitiesOnScoreboards && !(this instanceof EntityHuman)) { return null; } // Paper
         return this.world.getScoreboard().getPlayerTeam(this.getUniqueID().toString());
     }
 
-- 
2.7.2