From 418f131fc4357962762b01fc1fe80f982ec5ae57 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 c6f12a1..b813a9b 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -267,4 +267,9 @@ 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 b044f33..1758a56 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 df49185..26f83a4 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1845,6 +1845,7 @@ 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());
     }
 
-- 
2.8.0