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.

Spigot-Server-Patches/0079-Disable-Scoreboards-for-non-players-by-default.patch

@@ -0,0 +1,53 @@
+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
+