Option to disable BlockPhysicsEvent for Redstone

Not sure of any reason a plugin would need to act on a Physics event
for redstone. There is a BlockRedstoneEvent that plugins can also use
for accessing redstone activity.

Defaulting this to false will provide substantial performance improvement
by saving millions of event calls on redstone heavy servers.

Spigot-Server-Patches/0114-Option-to-disable-BlockPhysicsEvent-for-Redstone.patch

@@ -0,0 +1,71 @@
+From ee488c87907477ec2a49d7c1e7b6ebf2797d7126 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Mon, 28 Mar 2016 19:55:45 -0400
+Subject: [PATCH] Option to disable BlockPhysicsEvent for Redstone
+
+Not sure of any reason a plugin would need to act on a Physics event
+for redstone. There is a BlockRedstoneEvent that plugins can also use
+for accessing redstone activity.
+
+Defaulting this to false will provide substantial performance improvement
+by saving millions of event calls on redstone heavy servers.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+index 66ba48a..2740906 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+@@ -306,4 +306,9 @@ public class PaperWorldConfig {
+     private void skeleHorseSpawnChance() {
+         skeleHorseSpawnChance = getDouble("skeleton-horse-thunder-spawn-chance", -1.0D); // -1.0D represents a "vanilla" state
+     }
++
++    public boolean firePhysicsEventForRedstone = false;
++    private void firePhysicsEventForRedstone() {
++        firePhysicsEventForRedstone = getBoolean("fire-physics-event-for-redstone", firePhysicsEventForRedstone);
++    }
+ }
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index e5ea99c..8f732bb 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -574,7 +574,7 @@ public abstract class World implements IBlockAccess {
+             try {
+                 // CraftBukkit start
+                 CraftWorld world = ((WorldServer) this).getWorld();
+-                if (world != null) {
++                if (world != null && !((WorldServer)this).stopPhysicsEvent) { // Paper
+                     BlockPhysicsEvent event = new BlockPhysicsEvent(world.getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()), CraftMagicNumbers.getId(block));
+                     this.getServer().getPluginManager().callEvent(event);
+ 
+diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
+index f7bb918..3c41a0c 100644
+--- a/src/main/java/net/minecraft/server/WorldServer.java
++++ b/src/main/java/net/minecraft/server/WorldServer.java
+@@ -29,6 +29,7 @@ import org.bukkit.event.weather.LightningStrikeEvent;
+ public class WorldServer extends World implements IAsyncTaskHandler {
+ 
+     private static final Logger a = LogManager.getLogger();
++    boolean stopPhysicsEvent = false; // Paper
+     private final MinecraftServer server;
+     public EntityTracker tracker;
+     private final PlayerChunkMap manager;
+@@ -766,6 +767,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
+ 
+                         if (iblockdata.getMaterial() != Material.AIR && Block.a(iblockdata.getBlock(), nextticklistentry.a())) {
+                             try {
++                                stopPhysicsEvent = !paperConfig.firePhysicsEventForRedstone && iblockdata.getBlock() instanceof BlockDiodeAbstract; // Paper
+                                 iblockdata.getBlock().b((World) this, nextticklistentry.a, iblockdata, this.random);
+                             } catch (Throwable throwable) {
+                                 CrashReport crashreport = CrashReport.a(throwable, "Exception while ticking a block");
+@@ -773,7 +775,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
+ 
+                                 CrashReportSystemDetails.a(crashreportsystemdetails, nextticklistentry.a, iblockdata);
+                                 throw new ReportedException(crashreport);
+-                            }
++                            } finally { stopPhysicsEvent = false; } // Paper
+                         }
+                         timing.stopTiming(); // Paper
+                     } else {
+-- 
+2.7.4
+