2 patch

2021-06-13 21:27:51 -07:00 · 2021-06-13 21:27:51 -07:00 · d001eefd7e
commit d001eefd7e
parent 961f297963
2 changed files with 145 additions and 158 deletions
--- a/patches/server/0424-Use-distance-map-to-optimise-entity-tracker.patch
+++ b/patches/server/0424-Use-distance-map-to-optimise-entity-tracker.patch
@ -0,0 +1,409 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Tue, 5 May 2020 20:18:05 -0700
+Subject: [PATCH] Use distance map to optimise entity tracker
+
+Use the distance map to find candidate players for tracking.
+
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index 11fd6d24ed0612e4df1a0493907178fb9c455d1c..d7023cb0974f6c28a0fb8a0a6e5a6600fe30d3e3 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -1718,6 +1718,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+         }
+     }
+ 
+    public final int applyTrackingRangeScale(int value) { return this.getScaledTrackingDistance(value); } // Paper - OBFHELPER
+     public int getScaledTrackingDistance(int initialDistance) {
+         return initialDistance;
+     }
+diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
+index f9fcf99ec7151b4f00ef2c40b0cbc2fd3a8e002c..f7032e1d64afa6707756bb5a2af9d43a808c9736 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
+@@ -58,6 +58,7 @@ import net.minecraft.network.protocol.game.ClientboundSetEntityLinkPacket;
+ import net.minecraft.network.protocol.game.ClientboundSetPassengersPacket;
+ import net.minecraft.network.protocol.game.DebugPackets;
+ import net.minecraft.server.MCUtil;
+import net.minecraft.server.MinecraftServer;
+ import net.minecraft.server.level.progress.ChunkProgressListener;
+ import net.minecraft.server.network.ServerPlayerConnection;
+ import net.minecraft.util.CsvOutput;
+@@ -222,11 +223,33 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+     public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerViewDistanceTickMap;
+     public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerViewDistanceNoTickMap;
+     // Paper end - no-tick view distance
+    // Paper start - use distance map to optimise tracker
+    public static boolean isLegacyTrackingEntity(Entity entity) {
+        return entity.isLegacyTrackingEntity;
+    }
+
+    // inlined EnumMap, TrackingRange.TrackingRangeType
+    static final org.spigotmc.TrackingRange.TrackingRangeType[] TRACKING_RANGE_TYPES = org.spigotmc.TrackingRange.TrackingRangeType.values();
+    public final com.destroystokyo.paper.util.misc.PlayerAreaMap[] playerEntityTrackerTrackMaps;
+    final int[] entityTrackerTrackRanges;
+
+    private int convertSpigotRangeToVanilla(final int vanilla) {
+        return MinecraftServer.getServer().applyTrackingRangeScale(vanilla);
+    }
+    // Paper end - use distance map to optimise tracker
+ 
+     void addPlayerToDistanceMaps(ServerPlayer player) {
+         int chunkX = MCUtil.getChunkCoordinate(player.getX());
+         int chunkZ = MCUtil.getChunkCoordinate(player.getZ());
+         // Note: players need to be explicitly added to distance maps before they can be updated
+        // Paper start - use distance map to optimise entity tracker
+        for (int i = 0, len = TRACKING_RANGE_TYPES.length; i < len; ++i) {
+            com.destroystokyo.paper.util.misc.PlayerAreaMap trackMap = this.playerEntityTrackerTrackMaps[i];
+            int trackRange = this.entityTrackerTrackRanges[i];
+
+            trackMap.add(player, chunkX, chunkZ, Math.min(trackRange, this.getEffectiveViewDistance()));
+        }
+        // Paper end - use distance map to optimise entity tracker
+         // Paper start - no-tick view distance
+         int effectiveTickViewDistance = this.getEffectiveViewDistance();
+         int effectiveNoTickViewDistance = Math.max(this.getEffectiveNoTickViewDistance(), effectiveTickViewDistance);
+@@ -243,7 +266,11 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+     }
+ 
+     void removePlayerFromDistanceMaps(ServerPlayer player) {
+-
+        // Paper start - use distance map to optimise tracker
+        for (int i = 0, len = TRACKING_RANGE_TYPES.length; i < len; ++i) {
+            this.playerEntityTrackerTrackMaps[i].remove(player);
+        }
+        // Paper end - use distance map to optimise tracker
+         // Paper start - no-tick view distance
+         this.playerViewDistanceBroadcastMap.remove(player);
+         this.playerViewDistanceTickMap.remove(player);
+@@ -255,6 +282,14 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         int chunkX = MCUtil.getChunkCoordinate(player.getX());
+         int chunkZ = MCUtil.getChunkCoordinate(player.getZ());
+         // Note: players need to be explicitly added to distance maps before they can be updated
+        // Paper start - use distance map to optimise entity tracker
+        for (int i = 0, len = TRACKING_RANGE_TYPES.length; i < len; ++i) {
+            com.destroystokyo.paper.util.misc.PlayerAreaMap trackMap = this.playerEntityTrackerTrackMaps[i];
+            int trackRange = this.entityTrackerTrackRanges[i];
+
+            trackMap.update(player, chunkX, chunkZ, Math.min(trackRange, this.getEffectiveViewDistance()));
+        }
+        // Paper end - use distance map to optimise entity tracker
+         // Paper start - no-tick view distance
+         int effectiveTickViewDistance = this.getEffectiveViewDistance();
+         int effectiveNoTickViewDistance = Math.max(this.getEffectiveNoTickViewDistance(), effectiveTickViewDistance);
+@@ -306,6 +341,45 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         this.poiManager = new PoiManager(new File(this.storageFolder, "poi"), dataFixer, dsync, world);
+         this.setViewDistance(viewDistance);
+         this.playerMobDistanceMap = this.level.paperConfig.perPlayerMobSpawns ? new com.destroystokyo.paper.util.PlayerMobDistanceMap() : null; // Paper
+        // Paper start - use distance map to optimise entity tracker
+        this.playerEntityTrackerTrackMaps = new com.destroystokyo.paper.util.misc.PlayerAreaMap[TRACKING_RANGE_TYPES.length];
+        this.entityTrackerTrackRanges = new int[TRACKING_RANGE_TYPES.length];
+
+        org.spigotmc.SpigotWorldConfig spigotWorldConfig = this.level.spigotConfig;
+
+        for (int ordinal = 0, len = TRACKING_RANGE_TYPES.length; ordinal < len; ++ordinal) {
+            org.spigotmc.TrackingRange.TrackingRangeType trackingRangeType = TRACKING_RANGE_TYPES[ordinal];
+            int configuredSpigotValue;
+            switch (trackingRangeType) {
+                case PLAYER:
+                    configuredSpigotValue = spigotWorldConfig.playerTrackingRange;
+                    break;
+                case ANIMAL:
+                    configuredSpigotValue = spigotWorldConfig.animalTrackingRange;
+                    break;
+                case MONSTER:
+                    configuredSpigotValue = spigotWorldConfig.monsterTrackingRange;
+                    break;
+                case MISC:
+                    configuredSpigotValue = spigotWorldConfig.miscTrackingRange;
+                    break;
+                case OTHER:
+                    configuredSpigotValue = spigotWorldConfig.otherTrackingRange;
+                    break;
+                case ENDERDRAGON:
+                    configuredSpigotValue = EntityType.ENDER_DRAGON.clientTrackingRange() * 16;
+                    break;
+                default:
+                    throw new IllegalStateException("Missing case for enum " + trackingRangeType);
+            }
+            configuredSpigotValue = convertSpigotRangeToVanilla(configuredSpigotValue);
+
+            int trackRange = (configuredSpigotValue >>> 4) + ((configuredSpigotValue & 15) != 0 ? 1 : 0);
+            this.entityTrackerTrackRanges[ordinal] = trackRange;
+
+            this.playerEntityTrackerTrackMaps[ordinal] = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets);
+        }
+        // Paper end - use distance map to optimise entity tracker
+         // Paper start - no-tick view distance
+         this.setNoTickViewDistance(this.level.paperConfig.noTickViewDistance);
+         this.playerViewDistanceTickMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
+@@ -1424,17 +1498,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+     }
+ 
+     public void move(ServerPlayer player) {
+-        ObjectIterator objectiterator = this.entityMap.values().iterator();
+-
+-        while (objectiterator.hasNext()) {
+-            ChunkMap.TrackedEntity playerchunkmap_entitytracker = (ChunkMap.TrackedEntity) objectiterator.next();
+-
+-            if (playerchunkmap_entitytracker.entity == player) {
+-                playerchunkmap_entitytracker.updatePlayers(this.level.players());
+-            } else {
+-                playerchunkmap_entitytracker.updatePlayer(player);
+-            }
+-        }
+        // Paper - delay this logic for the entity tracker tick, no need to duplicate it
+ 
+         int i = SectionPos.blockToSectionCoord(player.getBlockX());
+         int j = SectionPos.blockToSectionCoord(player.getBlockZ());
+@@ -1589,7 +1653,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+ 
+                     entity.tracker = playerchunkmap_entitytracker; // Paper - Fast access to tracker
+                     this.entityMap.put(entity.getId(), playerchunkmap_entitytracker);
+-                    playerchunkmap_entitytracker.updatePlayers(this.level.players());
+                    playerchunkmap_entitytracker.updatePlayers(entity.getPlayersInTrackRange()); // Paper - don't search all players
+                     if (entity instanceof ServerPlayer) {
+                         ServerPlayer entityplayer = (ServerPlayer) entity;
+ 
+@@ -1633,7 +1697,37 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         entity.tracker = null; // Paper - We're no longer tracked
+     }
+ 
+    // Paper start - optimised tracker
+    private final void processTrackQueue() {
+        this.level.timings.tracker1.startTiming();
+        try {
+            for (TrackedEntity tracker : this.entityMap.values()) {
+                // update tracker entry
+                tracker.updatePlayers(tracker.entity.getPlayersInTrackRange());
+            }
+        } finally {
+            this.level.timings.tracker1.stopTiming();
+        }
+
+
+        this.level.timings.tracker2.startTiming();
+        try {
+            for (TrackedEntity tracker : this.entityMap.values()) {
+                tracker.serverEntity.tick();
+            }
+        } finally {
+            this.level.timings.tracker2.stopTiming();
+        }
+    }
+    // Paper end - optimised tracker
+
+     protected void tick() {
+        // Paper start - optimized tracker
+        if (true) {
+            this.processTrackQueue();
+            return;
+        }
+        // Paper end - optimized tracker
+         List<ServerPlayer> list = Lists.newArrayList();
+         List<ServerPlayer> list1 = this.level.players();
+ 
+@@ -1742,23 +1836,31 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
+         DebugPackets.sendPoiPacketsForChunk(this.level, chunk.getPos());
+         List<Entity> list = Lists.newArrayList();
+         List<Entity> list1 = Lists.newArrayList();
+-        ObjectIterator objectiterator = this.entityMap.values().iterator();
+        // Paper start - optimise entity tracker
+        // use the chunk entity list, not the whole trackedEntities map...
+        Entity[] entities = chunk.entities.getRawData();
+        for (int i = 0, size = chunk.entities.size(); i < size; ++i) {
+            Entity entity = entities[i];
+            if (entity == player) {
+                continue;
+            }
+            ChunkMap.TrackedEntity tracker = this.entityMap.get(entity.getId());
+            if (tracker != null) { // dumb plugins... move on...
+                tracker.updatePlayer(player);
+            }
+ 
+-        while (objectiterator.hasNext()) {
+-            ChunkMap.TrackedEntity playerchunkmap_entitytracker = (ChunkMap.TrackedEntity) objectiterator.next();
+-            Entity entity = playerchunkmap_entitytracker.entity;
+            // keep the vanilla logic here - this is REQUIRED or else passengers and their vehicles disappear!
+            // (and god knows what the leash thing is)
+ 
+-            if (entity != player && entity.chunkPosition().equals(chunk.getPos())) {
+-                playerchunkmap_entitytracker.updatePlayer(player);
+-                if (entity instanceof Mob && ((Mob) entity).getLeashHolder() != null) {
+-                    list.add(entity);
+-                }
+            if (entity instanceof Mob && ((Mob)entity).getLeashHolder() != null) {
+                list.add(entity);
+            }
+ 
+-                if (!entity.getPassengers().isEmpty()) {
+-                    list1.add(entity);
+-                }
+            if (!entity.getPassengers().isEmpty()) {
+                list1.add(entity);
+             }
+         }
+        // Paper end - optimise entity tracker
+ 
+         Iterator iterator;
+         Entity entity1;
+@@ -1837,6 +1939,42 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
+             this.lastSectionPos = SectionPos.of(entity);
+         }
+ 
+        // Paper start - use distance map to optimise tracker
+        com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> lastTrackerCandidates;
+
+        final void updatePlayers(com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newTrackerCandidates) {
+            com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> oldTrackerCandidates = this.lastTrackerCandidates;
+            this.lastTrackerCandidates = newTrackerCandidates;
+
+            if (newTrackerCandidates != null) {
+                Object[] rawData = newTrackerCandidates.getBackingSet();
+                for (int i = 0, len = rawData.length; i < len; ++i) {
+                    Object raw = rawData[i];
+                    if (!(raw instanceof ServerPlayer)) {
+                        continue;
+                    }
+                    ServerPlayer player = (ServerPlayer)raw;
+                    this.updatePlayer(player);
+                }
+            }
+
+            if (oldTrackerCandidates == newTrackerCandidates) {
+                // this is likely the case.
+                // means there has been no range changes, so we can just use the above for tracking.
+                return;
+            }
+
+            // stuff could have been removed, so we need to check the trackedPlayers set
+            // for players that were removed
+
+            for (ServerPlayerConnection conn : this.seenBy.toArray(new ServerPlayerConnection[0])) { // avoid CME
+                if (newTrackerCandidates == null || !newTrackerCandidates.contains(conn)) {
+                    this.updatePlayer(conn.getPlayer());
+                }
+            }
+        }
+        // Paper end - use distance map to optimise tracker
+
+         public boolean equals(Object object) {
+             return object instanceof ChunkMap.TrackedEntity ? ((ChunkMap.TrackedEntity) object).entity.getId() == this.entity.getId() : false;
+         }
+@@ -1922,7 +2060,7 @@ Sections go from 0..16. Now whenever a section is not empty, it can potentially
+                 int j = entity.getType().clientTrackingRange() * 16;
+                 j = org.spigotmc.TrackingRange.getEntityTrackingRange(entity, j); // Paper
+ 
+-                if (j > i) {
+                if (j < i) { // Paper - we need the lowest range thanks to the fact that our tracker doesn't account for passenger logic
+                     i = j;
+                 }
+             }
+diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
+index 28afe2f238ded241acf77c3272a44068646b9133..6b492b72b177e3c58580561585609b176876acf1 100644
+--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
+@@ -87,6 +87,7 @@ public class ServerEntity {
+         this.wasOnGround = entity.isOnGround();
+     }
+ 
+    public final void tick() { this.sendChanges(); } // Paper - OBFHELPER
+     public void sendChanges() {
+         List<Entity> list = this.entity.getPassengers();
+ 
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index 9897a0ac66dd788b0b22a88b20ca86a386e397e4..dec5690bd90830bace704b553dbcd1d2633ab668 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -50,6 +50,7 @@ import net.minecraft.network.syncher.EntityDataSerializers;
+ import net.minecraft.network.syncher.SynchedEntityData;
+ import net.minecraft.resources.ResourceKey;
+ import net.minecraft.resources.ResourceLocation;
+import net.minecraft.server.MCUtil;
+ import net.minecraft.server.MinecraftServer;
+ import net.minecraft.server.level.ServerLevel;
+ import net.minecraft.server.level.ServerPlayer;
+@@ -322,6 +323,21 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, n
+     }
+     // CraftBukkit end
+ 
+    // Paper start - optimise entity tracking
+    final org.spigotmc.TrackingRange.TrackingRangeType trackingRangeType = org.spigotmc.TrackingRange.getTrackingRangeType(this);
+
+    public boolean isLegacyTrackingEntity = false;
+
+    public final void setLegacyTrackingEntity(final boolean isLegacyTrackingEntity) {
+        this.isLegacyTrackingEntity = isLegacyTrackingEntity;
+    }
+
+    public final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> getPlayersInTrackRange() {
+        return ((ServerLevel)this.level).getChunkSource().chunkMap.playerEntityTrackerTrackMaps[this.trackingRangeType.ordinal()]
+            .getObjectsInRange(MCUtil.getCoordinateKey(this));
+    }
+    // Paper end - optimise entity tracking
+
+     public Entity(EntityType<?> type, Level world) {
+         this.id = Entity.ENTITY_COUNTER.incrementAndGet();
+         this.passengers = ImmutableList.of();
+diff --git a/src/main/java/org/spigotmc/TrackingRange.java b/src/main/java/org/spigotmc/TrackingRange.java
+index 24b1dfcf91d36947c87e9e5c2524317f8775ba95..e5bcbfe175a697e04886d04543e1278b7e83a184 100644
+--- a/src/main/java/org/spigotmc/TrackingRange.java
+++ b/src/main/java/org/spigotmc/TrackingRange.java
+@@ -24,6 +24,7 @@ public class TrackingRange
+         {
+             return defaultRange;
+         }
+        if (entity instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon) return defaultRange; // Paper - enderdragon is exempt
+         SpigotWorldConfig config = entity.level.spigotConfig;
+         if ( entity instanceof ServerPlayer )
+         {
+@@ -47,8 +48,48 @@ public class TrackingRange
+             return config.miscTrackingRange;
+         } else
+         {
+-            if (entity instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon) return ((net.minecraft.server.level.ServerLevel)(entity.getCommandSenderWorld())).getChunkSource().chunkMap.getLoadViewDistance(); // Paper - enderdragon is exempt
+             return config.otherTrackingRange;
+         }
+     }
+
+    // Paper start - optimise entity tracking
+    // copied from above, TODO check on update
+    public static TrackingRangeType getTrackingRangeType(Entity entity)
+    {
+        if (entity instanceof net.minecraft.world.entity.boss.enderdragon.EnderDragon) return TrackingRangeType.ENDERDRAGON; // Paper - enderdragon is exempt
+        if ( entity instanceof ServerPlayer )
+        {
+            return TrackingRangeType.PLAYER;
+            // Paper start - Simplify and set water mobs to animal tracking range
+        }
+        switch (entity.activationType) {
+            case RAIDER:
+            case MONSTER:
+            case FLYING_MONSTER:
+                return TrackingRangeType.MONSTER;
+            case WATER:
+            case VILLAGER:
+            case ANIMAL:
+                return TrackingRangeType.ANIMAL;
+            case MISC:
+        }
+        if ( entity instanceof ItemFrame || entity instanceof Painting || entity instanceof ItemEntity || entity instanceof ExperienceOrb )
+        // Paper end
+        {
+            return TrackingRangeType.MISC;
+        } else
+        {
+            return TrackingRangeType.OTHER;
+        }
+    }
+
+    public static enum TrackingRangeType {
+        PLAYER,
+        ANIMAL,
+        MONSTER,
+        MISC,
+        OTHER,
+        ENDERDRAGON;
+    }
+    // Paper end - optimise entity tracking
+ }
--- a/patches/server/0425-Optimize-isOutsideRange-to-use-distance-maps.patch
+++ b/patches/server/0425-Optimize-isOutsideRange-to-use-distance-maps.patch
@ -0,0 +1,375 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Tue, 5 May 2020 20:40:53 -0700
+Subject: [PATCH] Optimize isOutsideRange to use distance maps
+
+Use a distance map to find the players in range quickly
+
+diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+index 58369d70bcd8b2c25609b6f101d9cbe2031df352..969b0c9cf6d7eb2055d3b804f25a3cbc161ceaea 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
+++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+@@ -100,6 +100,18 @@ public class ChunkHolder {
+     }
+     // Paper end
+ 
+    // Paper start - optimise isOutsideOfRange
+    // cached here to avoid a map lookup
+    com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> playersInMobSpawnRange;
+    com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> playersInChunkTickRange;
+
+    void updateRanges() {
+        long key = net.minecraft.server.MCUtil.getCoordinateKey(this.pos);
+        this.playersInMobSpawnRange = this.chunkMap.playerMobSpawnMap.getObjectsInRange(key);
+        this.playersInChunkTickRange = this.chunkMap.playerChunkTickRangeMap.getObjectsInRange(key);
+    }
+    // Paper end - optimise isOutsideOfRange
+
+     public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) {
+         this.futures = new AtomicReferenceArray(ChunkHolder.CHUNK_STATUSES.size());
+         this.fullChunkFuture = ChunkHolder.UNLOADED_LEVEL_CHUNK_FUTURE;
+@@ -121,6 +133,7 @@ public class ChunkHolder {
+         this.setTicketLevel(level);
+         this.changedBlocksPerSection = new ShortSet[world.getSectionsCount()];
+         this.chunkMap = (ChunkMap)playersWatchingChunkProvider; // Paper
+        this.updateRanges(); // Paper - optimise isOutsideOfRange
+     }
+ 
+     // CraftBukkit start
+diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
+index f7032e1d64afa6707756bb5a2af9d43a808c9736..18335e2c5c9e50a8ed31a3d2b585835bcc28bbe6 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
+@@ -237,6 +237,17 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         return MinecraftServer.getServer().applyTrackingRangeScale(vanilla);
+     }
+     // Paper end - use distance map to optimise tracker
+    // Paper start - optimise PlayerChunkMap#isOutsideRange
+    // A note about the naming used here:
+    // Previously, mojang used a "spawn range" of 8 for controlling both ticking and
+    // mob spawn range. However, spigot makes the spawn range configurable by
+    // checking if the chunk is in the tick range (8) and the spawn range
+    // obviously this means a spawn range > 8 cannot be implemented
+
+    // these maps are named after spigot's uses
+    public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerMobSpawnMap; // this map is absent from updateMaps since it's controlled at the start of the chunkproviderserver tick
+    public final com.destroystokyo.paper.util.misc.PlayerAreaMap playerChunkTickRangeMap;
+    // Paper end - optimise PlayerChunkMap#isOutsideRange
+ 
+     void addPlayerToDistanceMaps(ServerPlayer player) {
+         int chunkX = MCUtil.getChunkCoordinate(player.getX());
+@@ -250,6 +261,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+             trackMap.add(player, chunkX, chunkZ, Math.min(trackRange, this.getEffectiveViewDistance()));
+         }
+         // Paper end - use distance map to optimise entity tracker
+        // Paper start - optimise PlayerChunkMap#isOutsideRange
+        this.playerChunkTickRangeMap.update(player, chunkX, chunkZ, DistanceManager.MOB_SPAWN_RANGE);
+        // Paper end - optimise PlayerChunkMap#isOutsideRange
+        // Paper start - optimise PlayerChunkMap#isOutsideRange
+        this.playerChunkTickRangeMap.add(player, chunkX, chunkZ, DistanceManager.MOB_SPAWN_RANGE);
+        // Paper end - optimise PlayerChunkMap#isOutsideRange
+         // Paper start - no-tick view distance
+         int effectiveTickViewDistance = this.getEffectiveViewDistance();
+         int effectiveNoTickViewDistance = Math.max(this.getEffectiveNoTickViewDistance(), effectiveTickViewDistance);
+@@ -271,6 +288,10 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+             this.playerEntityTrackerTrackMaps[i].remove(player);
+         }
+         // Paper end - use distance map to optimise tracker
+        // Paper start - optimise PlayerChunkMap#isOutsideRange
+        this.playerMobSpawnMap.remove(player);
+        this.playerChunkTickRangeMap.remove(player);
+        // Paper end - optimise PlayerChunkMap#isOutsideRange
+         // Paper start - no-tick view distance
+         this.playerViewDistanceBroadcastMap.remove(player);
+         this.playerViewDistanceTickMap.remove(player);
+@@ -290,6 +311,9 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+             trackMap.update(player, chunkX, chunkZ, Math.min(trackRange, this.getEffectiveViewDistance()));
+         }
+         // Paper end - use distance map to optimise entity tracker
+        // Paper start - optimise PlayerChunkMap#isOutsideRange
+        this.playerChunkTickRangeMap.update(player, chunkX, chunkZ, DistanceManager.MOB_SPAWN_RANGE);
+        // Paper end - optimise PlayerChunkMap#isOutsideRange
+         // Paper start - no-tick view distance
+         int effectiveTickViewDistance = this.getEffectiveViewDistance();
+         int effectiveNoTickViewDistance = Math.max(this.getEffectiveNoTickViewDistance(), effectiveTickViewDistance);
+@@ -336,7 +360,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         this.mainThreadMailbox = this.queueSorter.getProcessor(mailbox, false);
+         this.mailboxLight = this.queueSorter.getProcessor(lightthreaded, false);// Paper
+         this.lightEngine = new ThreadedLevelLightEngine(chunkProvider, this, this.level.dimensionType().hasSkyLight(), threadedmailbox1, this.queueSorter.getProcessor(threadedmailbox1, false));
+-        this.distanceManager = new ChunkMap.ChunkDistanceManager(executor, mainThreadExecutor);
+        this.distanceManager = new ChunkMap.ChunkDistanceManager(executor, mainThreadExecutor); this.distanceManager.chunkMap = this; // Paper
+         this.overworldDataStorage = persistentStateManagerFactory;
+         this.poiManager = new PoiManager(new File(this.storageFolder, "poi"), dataFixer, dsync, world);
+         this.setViewDistance(viewDistance);
+@@ -380,6 +404,38 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+             this.playerEntityTrackerTrackMaps[ordinal] = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets);
+         }
+         // Paper end - use distance map to optimise entity tracker
+        // Paper start - optimise PlayerChunkMap#isOutsideRange
+        this.playerChunkTickRangeMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
+            (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+             com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+                ChunkHolder playerChunk = ChunkMap.this.getUpdatingChunkIfPresent(MCUtil.getCoordinateKey(rangeX, rangeZ));
+                if (playerChunk != null) {
+                    playerChunk.playersInChunkTickRange = newState;
+                }
+            },
+            (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+             com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+                ChunkHolder playerChunk = ChunkMap.this.getUpdatingChunkIfPresent(MCUtil.getCoordinateKey(rangeX, rangeZ));
+                if (playerChunk != null) {
+                    playerChunk.playersInChunkTickRange = newState;
+                }
+            });
+        this.playerMobSpawnMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
+            (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+             com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+                ChunkHolder playerChunk = ChunkMap.this.getUpdatingChunkIfPresent(MCUtil.getCoordinateKey(rangeX, rangeZ));
+                if (playerChunk != null) {
+                    playerChunk.playersInMobSpawnRange = newState;
+                }
+            },
+            (ServerPlayer player, int rangeX, int rangeZ, int currPosX, int currPosZ, int prevPosX, int prevPosZ,
+             com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> newState) -> {
+                ChunkHolder playerChunk = ChunkMap.this.getUpdatingChunkIfPresent(MCUtil.getCoordinateKey(rangeX, rangeZ));
+                if (playerChunk != null) {
+                    playerChunk.playersInMobSpawnRange = newState;
+                }
+            });
+        // Paper end - optimise PlayerChunkMap#isOutsideRange
+         // Paper start - no-tick view distance
+         this.setNoTickViewDistance(this.level.paperConfig.noTickViewDistance);
+         this.playerViewDistanceTickMap = new com.destroystokyo.paper.util.misc.PlayerAreaMap(this.pooledLinkedPlayerHashSets,
+@@ -649,6 +705,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         } else {
+             if (holder != null) {
+                 holder.setTicketLevel(level);
+                holder.updateRanges(); // Paper - optimise isOutsideOfRange
+             }
+ 
+             if (holder != null) {
+@@ -1434,29 +1491,50 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+         return this.isOutsideOfRange(chunkPos, false);
+     }
+ 
+-    boolean isOutsideOfRange(ChunkPos chunkcoordintpair, boolean reducedRange) {
+-        int chunkRange = level.spigotConfig.mobSpawnRange;
+-        chunkRange = (chunkRange > level.spigotConfig.viewDistance) ? (byte) level.spigotConfig.viewDistance : chunkRange;
+-        chunkRange = (chunkRange > 8) ? 8 : chunkRange;
+-
+-        final int finalChunkRange = chunkRange; // Paper for lambda below
+-        //double blockRange = (reducedRange) ? Math.pow(chunkRange << 4, 2) : 16384.0D; // Paper - use from event
+-        // Spigot end
+-        long i = chunkcoordintpair.toLong();
+    // Paper start - optimise isOutsideOfRange
+    final boolean isOutsideOfRange(ChunkPos chunkcoordintpair, boolean reducedRange) {
+        return this.isOutsideOfRange(this.getUpdatingChunkIfPresent(chunkcoordintpair.toLong()), chunkcoordintpair, reducedRange);
+    }
+    final boolean isOutsideOfRange(ChunkHolder playerchunk, ChunkPos chunkcoordintpair, boolean reducedRange) {
+        // this function is so hot that removing the map lookup call can have an order of magnitude impact on its performance
+        // tested and confirmed via System.nanoTime()
+        com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> playersInRange = reducedRange ? playerchunk.playersInMobSpawnRange : playerchunk.playersInChunkTickRange;
+        if (playersInRange == null) {
+            return true;
+        }
+        Object[] backingSet = playersInRange.getBackingSet();
+ 
+-        return !this.distanceManager.hasPlayersNearby(i) ? true : this.playerMap.getPlayers(i).noneMatch((entityplayer) -> {
+-            // Paper start - add PlayerNaturallySpawnCreaturesEvent
+-            com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent event;
+-            double blockRange = 16384.0D;
+-            if (reducedRange) {
+-                event = entityplayer.playerNaturallySpawnedEvent;
+-                if (event == null || event.isCancelled()) return false;
+-                blockRange = (double) ((event.getSpawnRadius() << 4) * (event.getSpawnRadius() << 4));
+        if (reducedRange) {
+            for (int i = 0, len = backingSet.length; i < len; ++i) {
+                Object raw = backingSet[i];
+                if (!(raw instanceof ServerPlayer)) {
+                    continue;
+                }
+                ServerPlayer player = (ServerPlayer) raw;
+                // don't check spectator and whatnot, already handled by mob spawn map update
+                if (player.lastEntitySpawnRadiusSquared > euclideanDistanceSquared(chunkcoordintpair, player)) {
+                    return false; // in range
+                }
+             }
+-            // Paper end
+-            return !entityplayer.isSpectator() && ChunkMap.euclideanDistanceSquared(chunkcoordintpair, (Entity) entityplayer) < blockRange; // Spigot
+-        });
+        } else {
+            final double range = (DistanceManager.MOB_SPAWN_RANGE * 16) * (DistanceManager.MOB_SPAWN_RANGE * 16);
+            // before spigot, mob spawn range was actually mob spawn range + tick range, but it was split
+            for (int i = 0, len = backingSet.length; i < len; ++i) {
+                Object raw = backingSet[i];
+                if (!(raw instanceof ServerPlayer)) {
+                    continue;
+                }
+                ServerPlayer player = (ServerPlayer) raw;
+                // don't check spectator and whatnot, already handled by mob spawn map update
+                if (range > euclideanDistanceSquared(chunkcoordintpair, player)) {
+                    return false; // in range
+                }
+            }
+        }
+        // no players in range
+        return true;
+     }
+    // Paper end - optimise isOutsideOfRange
+ 
+     private boolean skipPlayer(ServerPlayer player) {
+         return player.isSpectator() && !this.level.getGameRules().getBoolean(GameRules.RULE_SPECTATORSGENERATECHUNKS);
+diff --git a/src/main/java/net/minecraft/server/level/DistanceManager.java b/src/main/java/net/minecraft/server/level/DistanceManager.java
+index b49d380ef088aed3204ec71abc437c348ef004fa..577b391dcba1db712c1e2c83296e1c87b3e34ab2 100644
+--- a/src/main/java/net/minecraft/server/level/DistanceManager.java
+++ b/src/main/java/net/minecraft/server/level/DistanceManager.java
+@@ -45,7 +45,7 @@ public abstract class DistanceManager {
+     final Long2ObjectMap<ObjectSet<ServerPlayer>> playersPerChunk = new Long2ObjectOpenHashMap();
+     public final Long2ObjectOpenHashMap<SortedArraySet<Ticket<?>>> tickets = new Long2ObjectOpenHashMap();
+     private final DistanceManager.ChunkTicketTracker ticketTracker = new DistanceManager.ChunkTicketTracker();
+-    private final DistanceManager.FixedPlayerDistanceChunkTracker naturalSpawnChunkCounter = new DistanceManager.FixedPlayerDistanceChunkTracker(8);
+    public static final int MOB_SPAWN_RANGE = 8; // private final ChunkMapDistance.b f = new ChunkMapDistance.b(8); // Paper - no longer used
+     private final DistanceManager.PlayerTicketTracker playerTicketManager = new DistanceManager.PlayerTicketTracker(33);
+     // Paper start use a queue, but still keep unique requirement
+     public final java.util.Queue<ChunkHolder> pendingChunkUpdates = new java.util.ArrayDeque<ChunkHolder>() {
+@@ -64,6 +64,8 @@ public abstract class DistanceManager {
+     final Executor mainThreadExecutor;
+     private long ticketTickCounter;
+ 
+    ChunkMap chunkMap; // Paper
+
+     protected DistanceManager(Executor workerExecutor, Executor mainThreadExecutor) {
+         Objects.requireNonNull(mainThreadExecutor);
+         ProcessorHandle<Runnable> mailbox = ProcessorHandle.of("player ticket throttler", mainThreadExecutor::execute);
+@@ -108,7 +110,7 @@ public abstract class DistanceManager {
+     protected abstract ChunkHolder updateChunkScheduling(long pos, int level, @Nullable ChunkHolder holder, int k);
+ 
+     public boolean runAllUpdates(ChunkMap playerchunkmap) {
+-        this.naturalSpawnChunkCounter.runAllUpdates();
+        //this.f.a(); // Paper - no longer used
+         this.playerTicketManager.runAllUpdates();
+         int i = Integer.MAX_VALUE - this.ticketTracker.runDistanceUpdates(Integer.MAX_VALUE);
+         boolean flag = i != 0;
+@@ -244,7 +246,7 @@ public abstract class DistanceManager {
+         ((ObjectSet) this.playersPerChunk.computeIfAbsent(i, (j) -> {
+             return new ObjectOpenHashSet();
+         })).add(player);
+-        this.naturalSpawnChunkCounter.update(i, 0, true);
+        //this.f.update(i, 0, true); // Paper - no longer used
+         this.playerTicketManager.update(i, 0, true);
+     }
+ 
+@@ -256,7 +258,7 @@ public abstract class DistanceManager {
+         if (objectset != null) objectset.remove(player); // Paper - some state corruption happens here, don't crash, clean up gracefully.
+         if (objectset == null || objectset.isEmpty()) { // Paper
+             this.playersPerChunk.remove(i);
+-            this.naturalSpawnChunkCounter.update(i, Integer.MAX_VALUE, false);
+            //this.f.update(i, Integer.MAX_VALUE, false); // Paper - no longer used
+             this.playerTicketManager.update(i, Integer.MAX_VALUE, false);
+         }
+ 
+@@ -280,13 +282,17 @@ public abstract class DistanceManager {
+     }
+ 
+     public int getNaturalSpawnChunkCount() {
+-        this.naturalSpawnChunkCounter.runAllUpdates();
+-        return this.naturalSpawnChunkCounter.chunks.size();
+        // Paper start - use distance map to implement
+        // note: this is the spawn chunk count
+        return this.chunkMap.playerChunkTickRangeMap.size();
+        // Paper end - use distance map to implement
+     }
+ 
+     public boolean hasPlayersNearby(long i) {
+-        this.naturalSpawnChunkCounter.runAllUpdates();
+-        return this.naturalSpawnChunkCounter.chunks.containsKey(i);
+        // Paper start - use distance map to implement
+        // note: this is the is spawn chunk method
+        return this.chunkMap.playerChunkTickRangeMap.getObjectsInRange(i) != null;
+        // Paper end - use distance map to implement
+     }
+ 
+     public String getDebugStatus() {
+diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+index 3d1c4f8e0db37c6dabece657a17595e7bf1e3dc2..3faa808f41f057a9956c697ec1323330f5920b86 100644
+--- a/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+++ b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
+@@ -729,6 +729,37 @@ public class ServerChunkCache extends ChunkSource {
+         boolean flag1 = this.level.getGameRules().getBoolean(GameRules.RULE_DOMOBSPAWNING) && !this.level.players().isEmpty(); // CraftBukkit
+ 
+         if (!flag) {
+            // Paper start - optimize isOutisdeRange
+            ChunkMap playerChunkMap = this.chunkMap;
+            for (ServerPlayer player : this.level.players) {
+                if (!player.affectsSpawning || player.isSpectator()) {
+                    playerChunkMap.playerMobSpawnMap.remove(player);
+                    continue;
+                }
+
+                int viewDistance = this.chunkMap.getEffectiveViewDistance();
+
+                // copied and modified from isOutisdeRange
+                int chunkRange = level.spigotConfig.mobSpawnRange;
+                chunkRange = (chunkRange > viewDistance) ? (byte)viewDistance : chunkRange;
+                chunkRange = (chunkRange > DistanceManager.MOB_SPAWN_RANGE) ? DistanceManager.MOB_SPAWN_RANGE : chunkRange;
+
+                com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent event = new com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent(player.getBukkitEntity(), (byte)chunkRange);
+                event.callEvent();
+                if (event.isCancelled() || event.getSpawnRadius() < 0 || playerChunkMap.playerChunkTickRangeMap.getLastViewDistance(player) == -1) {
+                    playerChunkMap.playerMobSpawnMap.remove(player);
+                    continue;
+                }
+
+                int range = Math.min(event.getSpawnRadius(), 32); // limit to max view distance
+                int chunkX = net.minecraft.server.MCUtil.getChunkCoordinate(player.getX());
+                int chunkZ = net.minecraft.server.MCUtil.getChunkCoordinate(player.getZ());
+
+                playerChunkMap.playerMobSpawnMap.addOrUpdate(player, chunkX, chunkZ, range);
+                player.lastEntitySpawnRadiusSquared = (double)((range << 4) * (range << 4)); // used in isOutsideRange
+                player.playerNaturallySpawnedEvent = event;
+            }
+            // Paper end - optimize isOutisdeRange
+             this.level.getProfiler().push("pollingChunks");
+             int k = this.level.getGameRules().getInt(GameRules.RULE_RANDOMTICKING);
+             boolean flag2 = level.ticksPerAnimalSpawns != 0L && worlddata.getGameTime() % level.ticksPerAnimalSpawns == 0L; // CraftBukkit
+@@ -758,15 +789,7 @@ public class ServerChunkCache extends ChunkSource {
+             this.level.getProfiler().pop();
+             //List<PlayerChunk> list = Lists.newArrayList(this.playerChunkMap.f()); // Paper
+             //Collections.shuffle(list); // Paper
+-            //Paper start - call player naturally spawn event
+-            int chunkRange = level.spigotConfig.mobSpawnRange;
+-            chunkRange = (chunkRange > level.spigotConfig.viewDistance) ? (byte) level.spigotConfig.viewDistance : chunkRange;
+-            chunkRange = Math.min(chunkRange, 8);
+-            for (ServerPlayer entityPlayer : this.level.players()) {
+-                entityPlayer.playerNaturallySpawnedEvent = new com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent(entityPlayer.getBukkitEntity(), (byte) chunkRange);
+-                entityPlayer.playerNaturallySpawnedEvent.callEvent();
+-            };
+-            // Paper end
+            // Paper - moved up
+             this.level.timings.chunkTicks.startTiming(); // Paper
+             final int[] chunksTicked = {0}; this.chunkMap.forEachVisibleChunk((playerchunk) -> { // Paper - safe iterator incase chunk loads, also no wrapping
+                 Optional<LevelChunk> optional = ((Either) playerchunk.getTickingChunkFuture().getNow(ChunkHolder.UNLOADED_LEVEL_CHUNK)).left();
+@@ -781,9 +804,9 @@ public class ServerChunkCache extends ChunkSource {
+                     this.level.getProfiler().pop();
+                     ChunkPos chunkcoordintpair = chunk.getPos();
+ 
+-                    if (this.level.isPositionEntityTicking(chunkcoordintpair) && !this.chunkMap.noPlayersCloseForSpawning(chunkcoordintpair)) {
+                    if (this.level.isPositionEntityTicking(chunkcoordintpair) && !this.chunkMap.isOutsideOfRange(playerchunk, chunkcoordintpair, false)) { // Paper - optimise isOutsideOfRange
+                         chunk.setInhabitedTime(chunk.getInhabitedTime() + j);
+-                        if (flag1 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunk.getPos()) && !this.chunkMap.isOutsideOfRange(chunkcoordintpair, true)) { // Spigot
+                        if (flag1 && (this.spawnEnemies || this.spawnFriendlies) && this.level.getWorldBorder().isWithinBounds(chunk.getPos()) && !this.chunkMap.isOutsideOfRange(playerchunk, chunkcoordintpair, true)) { // Spigot // Paper - optimise isOutsideOfRange
+                             NaturalSpawner.spawnForChunk(this.level, chunk, spawnercreature_d, this.spawnFriendlies, this.spawnEnemies, flag2);
+                             if (chunksTicked[0]++ % 10 == 0) this.level.getServer().midTickLoadChunks(); // Paper
+                         }
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index c083ee1322f86809300fce1552eacd663aaa650d..cd34b5aa61c78d8138500a93f0a9714bedd7ed86 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -244,6 +244,7 @@ public class ServerPlayer extends Player {
+     // CraftBukkit end
+     public PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper
+ 
+    public double lastEntitySpawnRadiusSquared; // Paper - optimise isOutsideRange, this field is in blocks
+     public final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> cachedSingleHashSet; // Paper
+     boolean needsChunkCenterUpdate; // Paper - no-tick view distance
+