Implement optimized Tile Entity ticking

Spigot-Server-Patches/0032-Show-PaperSpigot-in-client-crashes-server-lists-and-.patch

@@ -1,4 +1,4 @@
-From 5f45ba374861f6f602851e837532c86ce8b018f0 Mon Sep 17 00:00:00 2001
+From 593eb666fbbc94ad31d0fa8edc1b396609c57817 Mon Sep 17 00:00:00 2001
 From: Zach Brown <Zbob750@live.com>
 Date: Tue, 19 Aug 2014 14:21:37 -0500
 Subject: [PATCH] Show 'PaperSpigot' in client crashes, server lists, and

Spigot-Server-Patches/0033-RIP-metrics.patch

@@ -1,4 +1,4 @@
-From b3dda52207845877ca74ff77188345c8e9f150af Mon Sep 17 00:00:00 2001
+From 8054c4bd0e8f23cb928f3668364a3a356e6c600b Mon Sep 17 00:00:00 2001
 From: Zach Brown <Zbob750@live.com>
 Date: Tue, 19 Aug 2014 14:25:40 -0500
 Subject: [PATCH] RIP metrics
@@ -657,7 +657,7 @@ index d9c3b63..0000000
 -}
 \ No newline at end of file
 diff --git a/src/main/java/org/spigotmc/SpigotConfig.java b/src/main/java/org/spigotmc/SpigotConfig.java
-index fdc64d3..414f8c1 100644
+index 919c83c..3b43e0f 100644
 --- a/src/main/java/org/spigotmc/SpigotConfig.java
 +++ b/src/main/java/org/spigotmc/SpigotConfig.java
 @@ -48,7 +48,6 @@ public class SpigotConfig

Spigot-Server-Patches/0034-Remove-invalid-mob-spawner-tile-entities.patch

@@ -1,4 +1,4 @@
-From 7e400c3c9715fb60b454dcdbe26762a5ff344839 Mon Sep 17 00:00:00 2001
+From 26a71dce3043888ddf32b404a9e01d11513b9e79 Mon Sep 17 00:00:00 2001
 From: Byteflux <byte@byteflux.net>
 Date: Tue, 19 Aug 2014 14:51:28 -0500
 Subject: [PATCH] Remove invalid mob spawner tile entities

Spigot-Server-Patches/0035-Optimize-TileEntity-Ticking.patch

@@ -0,0 +1,285 @@
+From 6e7a139066c3fd9fa5274045d80aede527b636ab Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 24 Aug 2014 21:35:11 -0400
+Subject: [PATCH] Optimize TileEntity Ticking
+
+Re-organizes the servers TileEntity Tick List to be bucketed based on their tick interval.
+
+We now will not even store a Tile Entity that is known to not have any tick function
+(half of them), skipping time spent iterating them and checking if they are valid
+and in a loaded chunk. In other words, a lot of "meta" time wasted on tile entities
+that would never do anything anyways.
+
+Then by reducing chests to 1 in 20 ticks, we cut out 95% of isLoaded checks and findPlayer
+calls on chests, and 100% of the checks for Signs, the 2 most popular Tile Entities.
+
+This cuts out a massive amount of checks revolving around TileEntity ticking.
+Servers with large amounts of TileEntities should see significant improvement.
+
+Finally, this then spreads out the ticking of reduced-rate TileEntities so that they
+do not all tick on the same tick, distributing the load of some TileEntities like Chest.
+
+diff --git a/src/main/java/net/minecraft/server/TileEntity.java b/src/main/java/net/minecraft/server/TileEntity.java
+index 3c5ec6f..27fedeb 100644
+--- a/src/main/java/net/minecraft/server/TileEntity.java
++++ b/src/main/java/net/minecraft/server/TileEntity.java
+@@ -56,6 +56,12 @@ public class TileEntity {
+             }
+         }
+     }
++
++    // Optimized TileEntity Tick changes
++    private static int tileEntityCounter = 0;
++    public boolean isAdded = false;
++    public int tileId = tileEntityCounter++;
++
+     // Spigot end
+ 
+     public TileEntity() {}
+diff --git a/src/main/java/net/minecraft/server/TileEntityBeacon.java b/src/main/java/net/minecraft/server/TileEntityBeacon.java
+index 09313ea..198f908 100644
+--- a/src/main/java/net/minecraft/server/TileEntityBeacon.java
++++ b/src/main/java/net/minecraft/server/TileEntityBeacon.java
+@@ -45,7 +45,7 @@ public class TileEntityBeacon extends TileEntity implements IInventory {
+     public TileEntityBeacon() {}
+ 
+     public void h() {
+-        if (this.world.getTime() % 80L == 0L) {
++        if (true || this.world.getTime() % 80L == 0L) { // PaperSpigot - controlled by Improved Tick handling
+             this.y();
+             this.x();
+         }
+diff --git a/src/main/java/net/minecraft/server/TileEntityChest.java b/src/main/java/net/minecraft/server/TileEntityChest.java
+index c900caf..e27716b 100644
+--- a/src/main/java/net/minecraft/server/TileEntityChest.java
++++ b/src/main/java/net/minecraft/server/TileEntityChest.java
+@@ -255,7 +255,7 @@ public class TileEntityChest extends TileEntity implements IInventory {
+         ++this.ticks;
+         float f;
+ 
+-        if (!this.world.isStatic && this.o != 0 && (this.ticks + this.x + this.y + this.z) % 200 == 0) {
++        if (!this.world.isStatic && this.o != 0 && (this.ticks + this.x + this.y + this.z) % 10 == 0) { // PaperSpigot Reduced 200 -> 10 interval due to reduced tick rate from Improved Tick Handling
+             this.o = 0;
+             f = 5.0F;
+             List list = this.world.a(EntityHuman.class, AxisAlignedBB.a((double) ((float) this.x - f), (double) ((float) this.y - f), (double) ((float) this.z - f), (double) ((float) (this.x + 1) + f), (double) ((float) (this.y + 1) + f), (double) ((float) (this.z + 1) + f)));
+diff --git a/src/main/java/net/minecraft/server/TileEntityEnderChest.java b/src/main/java/net/minecraft/server/TileEntityEnderChest.java
+index b205ab7..d76a2b2 100644
+--- a/src/main/java/net/minecraft/server/TileEntityEnderChest.java
++++ b/src/main/java/net/minecraft/server/TileEntityEnderChest.java
+@@ -11,7 +11,7 @@ public class TileEntityEnderChest extends TileEntity {
+ 
+     public void h() {
+         super.h();
+-        if (++this.k % 20 * 4 == 0) {
++        if (++this.k % 4 == 0) { // PaperSpigot Reduced (20 * 4) -> 4 interval due to reduced tick rate from Improved Tick Handling
+             this.world.playBlockAction(this.x, this.y, this.z, Blocks.ENDER_CHEST, 1, this.j);
+         }
+ 
+diff --git a/src/main/java/net/minecraft/server/TileEntityLightDetector.java b/src/main/java/net/minecraft/server/TileEntityLightDetector.java
+index 143cffb..de33df0 100644
+--- a/src/main/java/net/minecraft/server/TileEntityLightDetector.java
++++ b/src/main/java/net/minecraft/server/TileEntityLightDetector.java
+@@ -5,7 +5,7 @@ public class TileEntityLightDetector extends TileEntity {
+     public TileEntityLightDetector() {}
+ 
+     public void h() {
+-        if (this.world != null && !this.world.isStatic && this.world.getTime() % 20L == 0L) {
++        if (this.world != null && !this.world.isStatic /*&& this.world.getTime() % 20L == 0L*/) { // PaperSpigot - interval controlled by Improved Tick Handling
+             this.h = this.q();
+             if (this.h instanceof BlockDaylightDetector) {
+                 ((BlockDaylightDetector) this.h).e(this.world, this.x, this.y, this.z);
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index 33c228b..3bf2af0 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -58,7 +58,7 @@ public abstract class World implements IBlockAccess {
+     };
+     // Spigot end
+     protected List f = new ArrayList();
+-    public Set tileEntityList = new HashSet(); // CraftBukkit - ArrayList -> HashSet
++    public Set tileEntityList = new org.spigotmc.WorldTileEntityList(this); // CraftBukkit - ArrayList -> HashSet
+     private List a = new ArrayList();
+     private List b = new ArrayList();
+     public List players = new ArrayList();
+diff --git a/src/main/java/org/spigotmc/WorldTileEntityList.java b/src/main/java/org/spigotmc/WorldTileEntityList.java
+new file mode 100644
+index 0000000..4e6b762
+--- /dev/null
++++ b/src/main/java/org/spigotmc/WorldTileEntityList.java
+@@ -0,0 +1,173 @@
++package org.spigotmc;
++
++import com.google.common.collect.ArrayListMultimap;
++import com.google.common.collect.Maps;
++import com.google.common.collect.Multimap;
++import net.minecraft.server.*;
++import net.minecraft.util.gnu.trove.map.hash.TObjectIntHashMap;
++
++import java.util.Collection;
++import java.util.HashSet;
++import java.util.Iterator;
++import java.util.Map;
++
++public class WorldTileEntityList extends HashSet<TileEntity> {
++    private static final TObjectIntHashMap<Class<? extends TileEntity>> tileEntityTickIntervals =
++        new TObjectIntHashMap<Class<? extends TileEntity>>() {{
++            // Use -1 for no ticking
++            // These TE's have empty tick methods, doing nothing. Never bother ticking them.
++            for (Class<? extends TileEntity> ignored : new Class[]{
++                TileEntityChest.class, // PaperSpigot - Don't tick chests either
++                TileEntityEnderChest.class, // PaperSpigot - Don't tick chests either
++                TileEntityRecordPlayer.class,
++                TileEntityDispenser.class,
++                TileEntityDropper.class,
++                TileEntitySign.class,
++                TileEntityNote.class,
++                TileEntityEnderPortal.class,
++                TileEntityCommand.class,
++                TileEntitySkull.class,
++                TileEntityComparator.class,
++                TileEntityFlowerPot.class
++            }) {
++                put(ignored, -1);
++            }
++
++            // does findPlayer lookup, so this helps performance to slow down
++            put(TileEntityEnchantTable.class, 20);
++
++            // Slow things down that players won't notice due to craftbukkit "wall time" patches.
++            put(TileEntityFurnace.class, 10);
++            put(TileEntityBrewingStand.class, 10);
++
++            // Vanilla controlled values - These are checks already done in vanilla, so don't tick on ticks we know
++            // won't do anything anyways
++            put(TileEntityBeacon.class, 80);
++            put(TileEntityLightDetector.class, 20);
++        }};
++    private static int getInterval(Class<? extends TileEntity> cls) {
++        int tickInterval = tileEntityTickIntervals.get(cls);
++        return tickInterval != 0 ? tickInterval : 1;
++    }
++
++    private static int getBucketId(TileEntity entity, Integer interval) {
++        return entity.tileId % interval;
++    }
++
++    private final Map<Integer, Multimap<Integer, TileEntity>> tickList = Maps.newHashMap();
++    private final WorldServer world;
++
++    public WorldTileEntityList(World world) {
++        this.world = (WorldServer) world;
++    }
++
++
++    private Multimap<Integer, TileEntity> getBucket(int interval) {
++        Multimap<Integer, TileEntity> intervalBucket = tickList.get(interval);
++        if (intervalBucket == null) {
++            intervalBucket = ArrayListMultimap.create();
++            tickList.put(interval, intervalBucket);
++        }
++        return intervalBucket;
++    }
++
++    /**
++     * Adds the TileEntity to the tick list only if it is expected to tick
++     */
++    @Override
++    public boolean add(TileEntity entity) {
++        if (entity.isAdded) {
++            return false;
++        }
++
++        int interval = getInterval(entity.getClass());
++        if (interval > 0) {
++            entity.isAdded = true;
++            int bucket = getBucketId(entity, interval);
++            Multimap<Integer, TileEntity> typeBucket = getBucket(interval);
++            return typeBucket.put(bucket, entity);
++        }
++        return false;
++    }
++
++    @Override
++    public boolean remove(Object o) {
++        if (!(o instanceof TileEntity)) {
++            return false;
++        }
++        TileEntity entity = (TileEntity) o;
++        if (!entity.isAdded) {
++            return false;
++        }
++        entity.isAdded = false;
++        int interval = getInterval(entity.getClass());
++        int bucket = getBucketId(entity, interval);
++        Multimap<Integer, TileEntity> typeBucket = getBucket(interval);
++        return typeBucket.remove(bucket, entity);
++    }
++
++    @Override
++    public Iterator iterator() {
++        return new WorldTileEntityIterator();
++    }
++
++    @Override
++    public boolean contains(Object o) {
++        return o instanceof TileEntity && ((TileEntity) o).isAdded;
++    }
++
++    private class WorldTileEntityIterator implements Iterator<TileEntity> {
++        private final Iterator<Map.Entry<Integer, Multimap<Integer, TileEntity>>> intervalIterator;
++        private Map.Entry<Integer, Multimap<Integer, TileEntity>> intervalMap = null;
++        private Iterator<TileEntity> listIterator = null;
++
++        protected WorldTileEntityIterator() {
++            intervalIterator = tickList.entrySet().iterator();
++            nextInterval();
++        }
++
++        private boolean nextInterval() {
++            listIterator = null;
++            if (intervalIterator.hasNext()) {
++                intervalMap = intervalIterator.next();
++
++                final Integer interval = intervalMap.getKey();
++                final Multimap<Integer, TileEntity> buckets = intervalMap.getValue();
++
++                int bucket = (int) (world.getTime() % interval);
++
++                if (!buckets.isEmpty() && buckets.containsKey(bucket)) {
++                    final Collection<TileEntity> tileList = buckets.get(bucket);
++
++                    if (tileList != null && !tileList.isEmpty()) {
++                        listIterator = tileList.iterator();
++                        return true;
++                    }
++                }
++            }
++
++            return false;
++
++        }
++
++        @Override
++        public boolean hasNext() {
++            do {
++                if (listIterator != null && listIterator.hasNext()) {
++                    return true;
++                }
++            } while (nextInterval());
++            return false;
++        }
++
++        @Override
++        public TileEntity next() {
++            return listIterator.next();
++        }
++
++        @Override
++        public void remove() {
++            listIterator.remove();
++        }
++    }
++}
+-- 
+1.9.1
+

Spigot-Server-Patches/0036-Move-sound-handling-out-of-the-chest-tick-loop.patch

@@ -1,23 +1,26 @@
-From 662acf6926a1381394de4cf4e79540092912c20e Mon Sep 17 00:00:00 2001
+From 459bd528d5385f71580b40a3cd894c1bd8197520 Mon Sep 17 00:00:00 2001
 From: Iceee <andrew@opticgaming.tv>
-Date: Fri, 11 Jul 2014 01:31:43 -0500
-Subject: [PATCH] Don't tick chests
+Date: Mon, 11 Aug 2014 23:03:47 -0500
+Subject: [PATCH] Move sound handling out of the chest tick loop
 
+This allows us to disable ticking chests and enderchests without any
+noticeable difference to players
 
 diff --git a/src/main/java/net/minecraft/server/TileEntityChest.java b/src/main/java/net/minecraft/server/TileEntityChest.java
-index c900caf..19eff35 100644
+index e27716b..69ffd30 100644
 --- a/src/main/java/net/minecraft/server/TileEntityChest.java
 +++ b/src/main/java/net/minecraft/server/TileEntityChest.java
-@@ -249,6 +249,8 @@ public class TileEntityChest extends TileEntity implements IInventory {
-     }
+@@ -275,6 +275,9 @@ public class TileEntityChest extends TileEntity implements IInventory {
+         }
  
-     public void h() {
-+        // PaperSpigot start - Ixnay on the Chest tick-ay
+         this.n = this.m;
++
++        // PaperSpigot start - Move chest sound handling out of the tick loop
 +        /*
-         super.h();
-         if (this.world == null) return; // CraftBukkit
-         this.i();
-@@ -327,6 +329,8 @@ public class TileEntityChest extends TileEntity implements IInventory {
+         f = 0.1F;
+         double d0;
+ 
+@@ -327,6 +330,8 @@ public class TileEntityChest extends TileEntity implements IInventory {
                  this.m = 0.0F;
              }
          }
@@ -26,11 +29,11 @@ index c900caf..19eff35 100644
      }
  
      public boolean c(int i, int j) {
-@@ -349,6 +353,26 @@ public class TileEntityChest extends TileEntity implements IInventory {
+@@ -349,6 +354,26 @@ public class TileEntityChest extends TileEntity implements IInventory {
          if (this.world == null) return; // CraftBukkit
          this.world.playBlockAction(this.x, this.y, this.z, this.q(), 1, this.o);
  
-+        // PaperSpigot start - Move chest open sound handling down here
++        // PaperSpigot start - Move chest open sound handling down to here
 +        this.i();
 +        double d0;
 +
@@ -53,11 +56,11 @@ index c900caf..19eff35 100644
          // CraftBukkit start - Call redstone event
          if (this.q() == Blocks.TRAPPED_CHEST) {
              int newPower = Math.max(0, Math.min(15, this.o));
-@@ -371,6 +395,26 @@ public class TileEntityChest extends TileEntity implements IInventory {
+@@ -371,6 +396,26 @@ public class TileEntityChest extends TileEntity implements IInventory {
              if (this.world == null) return; // CraftBukkit
              this.world.playBlockAction(this.x, this.y, this.z, this.q(), 1, this.o);
  
-+            // PaperSpigot start - Move chest close sound handling down here
++            // PaperSpigot start - Move chest close sound handling down to here
 +            this.i();
 +            double d0;
 +
@@ -81,19 +84,20 @@ index c900caf..19eff35 100644
              if (this.q() == Blocks.TRAPPED_CHEST) {
                  int newPower = Math.max(0, Math.min(15, this.o));
 diff --git a/src/main/java/net/minecraft/server/TileEntityEnderChest.java b/src/main/java/net/minecraft/server/TileEntityEnderChest.java
-index b205ab7..158f2e0 100644
+index d76a2b2..339e133 100644
 --- a/src/main/java/net/minecraft/server/TileEntityEnderChest.java
 +++ b/src/main/java/net/minecraft/server/TileEntityEnderChest.java
-@@ -10,6 +10,8 @@ public class TileEntityEnderChest extends TileEntity {
-     public TileEntityEnderChest() {}
+@@ -16,6 +16,9 @@ public class TileEntityEnderChest extends TileEntity {
+         }
  
-     public void h() {
-+        // PaperSpigot start - Ixnay on the EnderChest tick-ay
+         this.i = this.a;
++
++        // PaperSpigot start - Move chest sound handling out of the tick loop
 +        /*
-         super.h();
-         if (++this.k % 20 * 4 == 0) {
-             this.world.playBlockAction(this.x, this.y, this.z, Blocks.ENDER_CHEST, 1, this.j);
-@@ -52,6 +54,8 @@ public class TileEntityEnderChest extends TileEntity {
+         float f = 0.1F;
+         double d0;
+ 
+@@ -52,6 +55,8 @@ public class TileEntityEnderChest extends TileEntity {
                  this.a = 0.0F;
              }
          }
@@ -102,7 +106,7 @@ index b205ab7..158f2e0 100644
      }
  
      public boolean c(int i, int j) {
-@@ -71,11 +75,39 @@ public class TileEntityEnderChest extends TileEntity {
+@@ -71,11 +76,39 @@ public class TileEntityEnderChest extends TileEntity {
      public void a() {
          ++this.j;
          this.world.playBlockAction(this.x, this.y, this.z, Blocks.ENDER_CHEST, 1, this.j);