hey, look ma, am doing my part!

patches/server/0348-PlayerDeathEvent-shouldDropExperience.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Tue, 24 Dec 2019 00:35:42 +0000
+Subject: [PATCH] PlayerDeathEvent#shouldDropExperience
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index ea73914ec8fb877de3f34cf7d5a0d60d547733fe..b193f8dfbe7b61c919ad5eb452d29885982e25e4 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
++++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -884,7 +884,7 @@ public class ServerPlayer extends Player {
+             this.tellNeutralMobsThatIDied();
+         }
+         // SPIGOT-5478 must be called manually now
+-        this.dropExperience();
++        if (event.shouldDropExperience()) this.dropExperience(); // Paper - tie to event
+         // we clean the player's inventory after the EntityDeathEvent is called so plugins can get the exact state of the inventory.
+         if (!event.getKeepInventory()) {
+             // Paper start - replace logic

patches/server/0349-Prevent-bees-loading-chunks-checking-hive-position.patch

@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Sun, 5 Jan 2020 17:24:34 -0600
+Subject: [PATCH] Prevent bees loading chunks checking hive position
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/animal/Bee.java b/src/main/java/net/minecraft/world/entity/animal/Bee.java
+index 4d335a725506cbf54604ea3e76ca39ef0f3ca013..d5d61129d72f061ef1e45d39778072ee1e51fc2d 100644
+--- a/src/main/java/net/minecraft/world/entity/animal/Bee.java
++++ b/src/main/java/net/minecraft/world/entity/animal/Bee.java
+@@ -497,6 +497,7 @@ public class Bee extends Animal implements NeutralMob, FlyingAnimal {
+         if (!this.hasHive()) {
+             return false;
+         } else {
++            if (level.getChunkIfLoadedImmediately(hivePos.getX() >> 4, hivePos.getZ() >> 4) == null) return true; // Paper - just assume the hive is still there, no need to load the chunk(s)
+             BlockEntity tileentity = this.level.getBlockEntity(this.hivePos);
+ 
+             return tileentity != null && tileentity.getType() == BlockEntityType.BEEHIVE;

patches/server/0350-Don-t-load-Chunks-from-Hoppers-and-other-things.patch

@@ -0,0 +1,32 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Thu, 3 Nov 2016 20:28:12 -0400
+Subject: [PATCH] Don't load Chunks from Hoppers and other things
+
+Hoppers call this to I guess "get the primary side" of a double sided chest.
+
+If the double sided chest crosses chunk lines, it causes the chunk to load.
+This will end up causing sync chunk loads, which will unload with Chunk GC,
+only to be reloaded again the next tick.
+
+This of course is undesirable, so just return the loaded side as "primary"
+and treat it as a single chest if the other sides are unloaded
+
+diff --git a/src/main/java/net/minecraft/world/level/block/DoubleBlockCombiner.java b/src/main/java/net/minecraft/world/level/block/DoubleBlockCombiner.java
+index ff2a7b08fe70adaecdaa508baadcfe40416519e0..7082bb0b28b6a046e3925f69e18b7c319871128f 100644
+--- a/src/main/java/net/minecraft/world/level/block/DoubleBlockCombiner.java
++++ b/src/main/java/net/minecraft/world/level/block/DoubleBlockCombiner.java
+@@ -25,7 +25,12 @@ public class DoubleBlockCombiner {
+                 return new DoubleBlockCombiner.NeighborCombineResult.Single<>(blockEntity);
+             } else {
+                 BlockPos blockPos = pos.relative(function.apply(state));
+-                BlockState blockState = world.getBlockState(blockPos);
++                // Paper start
++                BlockState blockState = world.getTypeIfLoaded(blockPos);
++                if (blockState == null) {
++                    return new DoubleBlockCombiner.NeighborCombineResult.Single<>(blockEntity);
++                }
++                // Paper end
+                 if (blockState.is(state.getBlock())) {
+                     DoubleBlockCombiner.BlockType blockType2 = typeMapper.apply(blockState);
+                     if (blockType2 != DoubleBlockCombiner.BlockType.SINGLE && blockType != blockType2 && blockState.getValue(directionProperty) == state.getValue(directionProperty)) {

patches/server/0351-Guard-against-serializing-mismatching-chunk-coordina.patch

@@ -0,0 +1,51 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Fri, 27 Dec 2019 09:42:26 -0800
+Subject: [PATCH] Guard against serializing mismatching chunk coordinate
+
+Should help if something dumb happens
+
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+index 992a7d6c4372942711a1381ac08ee13910a62cb0..37855d2183212cb043b30418740c0fd047dbc07f 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
+@@ -75,6 +75,12 @@ public class ChunkSerializer {
+ 
+     public ChunkSerializer() {}
+ 
++    // Paper start - guard against serializing mismatching coordinates
++    // TODO Note: This needs to be re-checked each update
++    public static ChunkPos getChunkCoordinate(CompoundTag chunkData) {
++        return new ChunkPos(chunkData.getInt("xPos"), chunkData.getInt("zPos"));
++    }
++    // Paper end
+     // Paper start
+     public static final class InProgressChunkHolder {
+ 
+@@ -100,7 +106,7 @@ public class ChunkSerializer {
+     public static InProgressChunkHolder loadChunk(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt, boolean distinguish) {
+         java.util.ArrayDeque<Runnable> tasksToExecuteOnMain = new java.util.ArrayDeque<>();
+         // Paper end
+-        ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos"));
++        ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
+ 
+         if (!Objects.equals(chunkPos, chunkcoordintpair1)) {
+             ChunkSerializer.LOGGER.error("Chunk file at {} is in the wrong location; relocating. (Expected {}, got {})", chunkPos, chunkPos, chunkcoordintpair1);
+diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
+index 1fc202caf9051f12192ed479898b01b0a02eebbd..0631a5b1af38ace5ad167d1986271081bd2ee7a6 100644
+--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
++++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkStorage.java
+@@ -132,6 +132,13 @@ public class ChunkStorage implements AutoCloseable {
+ 
+     // Paper start - async chunk io
+     public void write(ChunkPos chunkPos, CompoundTag nbt) throws IOException {
++        // Paper start
++        if (!chunkPos.equals(ChunkSerializer.getChunkCoordinate(nbt))) {
++            String world = (this instanceof net.minecraft.server.level.ChunkMap) ? ((net.minecraft.server.level.ChunkMap)this).level.getWorld().getName() : null;
++            throw new IllegalArgumentException("Chunk coordinate and serialized data do not have matching coordinates, trying to serialize coordinate " + chunkPos.toString()
++                + " but compound says coordinate is " + ChunkSerializer.getChunkCoordinate(nbt).toString() + (world == null ? " for an unknown world" : (" for world: " + world)));
++        }
++        // Paper end
+         this.regionFileCache.write(chunkPos, nbt);
+         // Paper end - Async chunk loading
+         if (this.legacyStructureHandler != null) {

patches/server/0352-Optimise-IEntityAccess-getPlayerByUUID.patch

@@ -0,0 +1,26 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Sat, 11 Jan 2020 21:50:56 -0800
+Subject: [PATCH] Optimise IEntityAccess#getPlayerByUUID
+
+Use the world entity map instead of iterating over all players
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
+index 53067edd56a4b7571f693c593c0f103567d589ec..3b43e64766e7b9e0444ebee12deee7f12fe5ddb8 100644
+--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
++++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
+@@ -382,6 +382,14 @@ public class ServerLevel extends Level implements WorldGenLevel {
+     public final com.destroystokyo.paper.io.chunk.ChunkTaskManager asyncChunkTaskManager;
+     // Paper end
+ 
++    // Paper start - optimise getPlayerByUUID
++    @Nullable
++    @Override
++    public Player getPlayerByUUID(UUID uuid) {
++        return this.getServer().getPlayerList().getPlayer(uuid);
++    }
++    // Paper end
++
+     // Add env and gen to constructor, WorldData -> WorldDataServer
+     public ServerLevel(MinecraftServer minecraftserver, Executor executor, LevelStorageSource.LevelStorageAccess convertable_conversionsession, ServerLevelData iworlddataserver, ResourceKey<Level> resourcekey, DimensionType dimensionmanager, ChunkProgressListener worldloadlistener, ChunkGenerator chunkgenerator, boolean flag, long i, List<CustomSpawner> list, boolean flag1, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider) {
+         // Objects.requireNonNull(minecraftserver); // CraftBukkit - decompile error

patches/server/0353-Fix-items-not-falling-correctly.patch

@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: AJMFactsheets <AJMFactsheets@gmail.com>
+Date: Fri, 17 Jan 2020 17:17:54 -0600
+Subject: [PATCH] Fix items not falling correctly
+
+Since 1.14, Mojang has added an optimization which skips checking if
+an item should fall every fourth tick.
+
+However, Spigot's entity activation range class also has an
+optimization which skips ticking active entities every fourth tick.
+This can result in a state where an item will never properly fall
+due to its move method never being called.
+
+This patch resolves the conflict by offsetting checking an item's
+move method from Spigot's entity activation range check.
+
+diff --git a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+index f3991a30f634122020ca6334bc6f2ca84e93ecac..1378c8ab35b3828f7c0ad504e64bb72484a1026d 100644
+--- a/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
++++ b/src/main/java/net/minecraft/world/entity/item/ItemEntity.java
+@@ -134,7 +134,7 @@ public class ItemEntity extends Entity {
+                 }
+             }
+ 
+-            if (!this.onGround || this.getDeltaMovement().horizontalDistanceSqr() > 9.999999747378752E-6D || (this.tickCount + this.getId()) % 4 == 0) {
++            if (!this.onGround || this.getDeltaMovement().horizontalDistanceSqr() > 9.999999747378752E-6D || this.tickCount % 4 == 0) { // Paper - Ensure checking item movement is always offset from Spigot's entity activation range check
+                 this.move(MoverType.SELF, this.getDeltaMovement());
+                 float f1 = 0.98F;
+ 

patches/server/0354-Lag-compensate-eating.patch

@@ -0,0 +1,75 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Tue, 14 Jan 2020 15:28:28 -0800
+Subject: [PATCH] Lag compensate eating
+
+When the server is lagging, players will wait longer when eating.
+Change to also use a time check instead if it passes.
+
+diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+index 077e5f4f787cdf4b8e7ba08dbc0c7bf04a6e5b93..8217a8e2c170aa78586ae0054a35fc9158f70bae 100644
+--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
++++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
+@@ -3501,6 +3501,11 @@ public abstract class LivingEntity extends Entity {
+         return ((Byte) this.entityData.get(LivingEntity.DATA_LIVING_ENTITY_FLAGS) & 2) > 0 ? InteractionHand.OFF_HAND : InteractionHand.MAIN_HAND;
+     }
+ 
++    // Paper start - lag compensate eating
++    protected long eatStartTime;
++    protected int totalEatTimeTicks;
++    // Paper end
++
+     private void updatingUsingItem() {
+         if (this.isUsingItem()) {
+             if (ItemStack.isSameIgnoreDurability(this.getItemInHand(this.getUsedItemHand()), this.useItem)) {
+@@ -3518,8 +3523,12 @@ public abstract class LivingEntity extends Entity {
+         if (this.shouldTriggerItemUseEffects()) {
+             this.triggerItemUseEffects(stack, 5);
+         }
+-
+-        if (--this.useItemRemaining == 0 && !this.level.isClientSide && !stack.useOnRelease()) {
++        // Paper start - lag compensate eating
++        // we add 1 to the expected time to avoid lag compensating when we should not
++        boolean shouldLagCompensate = this.useItem.getItem().isEdible() && this.eatStartTime != -1 && (System.nanoTime() - this.eatStartTime) > ((1 + this.totalEatTimeTicks) * 50 * (1000 * 1000));
++        if ((--this.useItemRemaining == 0 || shouldLagCompensate) && !this.level.isClientSide && !this.useItem.useOnRelease()) {
++            this.useItemRemaining = 0;
++            // Paper end
+             this.completeUsingItem();
+         }
+ 
+@@ -3567,7 +3576,10 @@ public abstract class LivingEntity extends Entity {
+ 
+         if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper use override flag
+             this.useItem = itemstack;
+-            this.useItemRemaining = itemstack.getUseDuration();
++            // Paper start - lag compensate eating
++            this.useItemRemaining = this.totalEatTimeTicks = itemstack.getUseDuration();
++            this.eatStartTime = System.nanoTime();
++            // Paper end
+             if (!this.level.isClientSide) {
+                 this.setLivingEntityFlag(1, true);
+                 this.setLivingEntityFlag(2, hand == InteractionHand.OFF_HAND);
+@@ -3591,7 +3603,10 @@ public abstract class LivingEntity extends Entity {
+                 }
+             } else if (!this.isUsingItem() && !this.useItem.isEmpty()) {
+                 this.useItem = ItemStack.EMPTY;
+-                this.useItemRemaining = 0;
++                // Paper start - lag compensate eating
++                this.useItemRemaining = this.totalEatTimeTicks = 0;
++                this.eatStartTime = -1L;
++                // Paper end
+             }
+         }
+ 
+@@ -3717,7 +3732,10 @@ public abstract class LivingEntity extends Entity {
+         }
+ 
+         this.useItem = ItemStack.EMPTY;
+-        this.useItemRemaining = 0;
++        // Paper start - lag compensate eating
++        this.useItemRemaining = this.totalEatTimeTicks = 0;
++        this.eatStartTime = -1L;
++        // Paper end
+     }
+ 
+     public boolean isBlocking() {

patches/server/0355-Optimize-call-to-getFluid-for-explosions.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: BrodyBeckwith <brody@beckwith.dev>
+Date: Tue, 14 Jan 2020 17:49:03 -0500
+Subject: [PATCH] Optimize call to getFluid for explosions
+
+
+diff --git a/src/main/java/net/minecraft/world/level/Explosion.java b/src/main/java/net/minecraft/world/level/Explosion.java
+index 32c8403d6a5f5fbd52679b12b07936147744b8a4..548f103e648d9670d7434182c6598dc29ae77b57 100644
+--- a/src/main/java/net/minecraft/world/level/Explosion.java
++++ b/src/main/java/net/minecraft/world/level/Explosion.java
+@@ -173,7 +173,7 @@ public class Explosion {
+                         for (float f1 = 0.3F; f > 0.0F; f -= 0.22500001F) {
+                             BlockPos blockposition = new BlockPos(d4, d5, d6);
+                             BlockState iblockdata = this.level.getBlockState(blockposition);
+-                            FluidState fluid = this.level.getFluidState(blockposition);
++                            FluidState fluid = iblockdata.getFluidState(); // Paper
+ 
+                             if (!this.level.isInWorldBounds(blockposition)) {
+                                 break;

patches/server/0356-Fix-last-firework-in-stack-not-having-effects-when-d.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Fri, 17 Jan 2020 18:44:55 -0800
+Subject: [PATCH] Fix last firework in stack not having effects when dispensed
+ - #2871
+
+CB used the resulting item in the dispenser rather than the item
+dispensed. The resulting item would have size == 0 and therefore
+be convertered to air, hence why the effects disappeared.
+
+diff --git a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+index ba28fdc1a7ed2bc9d55489a8aeb3f786d31c732e..89921ffeae7cc715aa18cbf8687e7c8e612e5612 100644
+--- a/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
++++ b/src/main/java/net/minecraft/core/dispenser/DispenseItemBehavior.java
+@@ -510,7 +510,7 @@ public interface DispenseItemBehavior {
+                 }
+ 
+                 itemstack1 = CraftItemStack.asNMSCopy(event.getItem());
+-                FireworkRocketEntity entityfireworks = new FireworkRocketEntity(pointer.getLevel(), stack, pointer.x(), pointer.y(), pointer.x(), true);
++                FireworkRocketEntity entityfireworks = new FireworkRocketEntity(pointer.getLevel(), itemstack1, pointer.x(), pointer.y(), pointer.x(), true); // Paper - GH-2871 - fix last firework in stack having no effects when dispensed
+ 
+                 DispenseItemBehavior.setEntityPokingOutOfBlock(pointer, entityfireworks, enumdirection);
+                 entityfireworks.shoot((double) enumdirection.getStepX(), (double) enumdirection.getStepY(), (double) enumdirection.getStepZ(), 0.5F, 1.0F);

patches/server/0357-Add-effect-to-block-break-naturally.patch

@@ -0,0 +1,37 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Thu, 2 Jan 2020 12:25:07 -0600
+Subject: [PATCH] Add effect to block break naturally
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+index 0408a72e801178375426edf3e1c1880774ca5478..00056d5b3426df121242de2ae01fca492d20089a 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftBlock.java
+@@ -468,6 +468,18 @@ public class CraftBlock implements Block {
+ 
+     @Override
+     public boolean breakNaturally(ItemStack item) {
++        // Paper start
++        return breakNaturally(item, false);
++    }
++
++    @Override
++    public boolean breakNaturally(boolean triggerEffect) {
++        return breakNaturally(null, triggerEffect);
++    }
++
++    @Override
++    public boolean breakNaturally(ItemStack item, boolean triggerEffect) {
++        // Paper end
+         // Order matters here, need to drop before setting to air so skulls can get their data
+         net.minecraft.world.level.block.state.BlockState iblockdata = this.getNMS();
+         net.minecraft.world.level.block.Block block = iblockdata.getBlock();
+@@ -477,6 +489,7 @@ public class CraftBlock implements Block {
+         // Modelled off EntityHuman#hasBlock
+         if (block != Blocks.AIR && (item == null || !iblockdata.requiresCorrectToolForDrops() || nmsItem.isCorrectToolForDrops(iblockdata))) {
+             net.minecraft.world.level.block.Block.dropResources(iblockdata, this.world.getMinecraftWorld(), position, this.world.getBlockEntity(position), null, nmsItem);
++            if (triggerEffect) world.levelEvent(org.bukkit.Effect.STEP_SOUND.getId(), position, net.minecraft.world.level.block.Block.getId(block.defaultBlockState())); // Paper
+             result = true;
+         }
+ 

patches/server/0358-Entity-Activation-Range-2.0.patch

@@ -0,0 +1,755 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Fri, 13 May 2016 01:38:06 -0400
+Subject: [PATCH] Entity Activation Range 2.0
+
+Optimizes performance of Activation Range
+
+Adds many new configurations and a new wake up inactive system
+
+Fixes and adds new Immunities to improve gameplay behavior
+
+Adds water Mobs to activation range config and nerfs fish
+Adds flying monsters to control ghast and phantoms
+Adds villagers as separate config
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
+index 3b43e64766e7b9e0444ebee12deee7f12fe5ddb8..09deaa9badf53bdc1292796c643751d8d92ac585 100644
+--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
++++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
+@@ -2,7 +2,6 @@ package net.minecraft.server.level;
+ 
+ import com.google.common.annotations.VisibleForTesting;
+ import co.aikar.timings.TimingHistory; // Paper
+-import co.aikar.timings.Timings; // Paper
+ import com.google.common.collect.Lists;
+ import com.mojang.datafixers.DataFixer;
+ import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+@@ -11,7 +10,6 @@ import it.unimi.dsi.fastutil.longs.LongSet;
+ import it.unimi.dsi.fastutil.longs.LongSets;
+ import it.unimi.dsi.fastutil.objects.Object2IntMap.Entry;
+ import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
+-import it.unimi.dsi.fastutil.objects.Object2IntMap;
+ import it.unimi.dsi.fastutil.objects.ObjectIterator;
+ import it.unimi.dsi.fastutil.objects.ObjectLinkedOpenHashSet;
+ import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
+@@ -964,17 +962,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
+         ++TimingHistory.entityTicks; // Paper - timings
+         // Spigot start
+         co.aikar.timings.Timing timer; // Paper
+-        if (!org.spigotmc.ActivationRange.checkIfActive(entity)) {
++        /*if (!org.spigotmc.ActivationRange.checkIfActive(entity)) { // Paper - comment out - EAR 2, reimplement below
+             entity.tickCount++;
+             timer = entity.getType().inactiveTickTimer.startTiming(); try { // Paper - timings
+             entity.inactiveTick();
+             } finally { timer.stopTiming(); } // Paper
+             return;
+-        }
++        }*/ // Paper - comment out EAR 2
+         // Spigot end
+         // Paper start- timings
+-        TimingHistory.activatedEntityTicks++;
+-        timer = entity.getVehicle() != null ? entity.getType().passengerTickTimer.startTiming() : entity.getType().tickTimer.startTiming();
++        final boolean isActive = org.spigotmc.ActivationRange.checkIfActive(entity);
++        timer = isActive ? entity.getType().tickTimer.startTiming() : entity.getType().inactiveTickTimer.startTiming(); // Paper
+         try {
+         // Paper end - timings
+         entity.setOldPosAndRot();
+@@ -985,9 +983,13 @@ public class ServerLevel extends Level implements WorldGenLevel {
+             return Registry.ENTITY_TYPE.getKey(entity.getType()).toString();
+         });
+         gameprofilerfiller.incrementCounter("tickNonPassenger");
++        if (isActive) { // Paper - EAR 2
++            TimingHistory.activatedEntityTicks++;
+         entity.tick();
+         entity.postTick(); // CraftBukkit
++        } else { entity.inactiveTick(); } // Paper - EAR 2
+         this.getProfiler().pop();
++        } finally { timer.stopTiming(); } // Paper - timings
+         Iterator iterator = entity.getPassengers().iterator();
+ 
+         while (iterator.hasNext()) {
+@@ -995,13 +997,18 @@ public class ServerLevel extends Level implements WorldGenLevel {
+ 
+             this.tickPassenger(entity, entity1);
+         }
+-        } finally { timer.stopTiming(); } // Paper - timings
++        // } finally { timer.stopTiming(); } // Paper - timings - move up
+ 
+     }
+ 
+     private void tickPassenger(Entity vehicle, Entity passenger) {
+         if (!passenger.isRemoved() && passenger.getVehicle() == vehicle) {
+             if (passenger instanceof Player || this.entityTickList.contains(passenger)) {
++                // Paper - EAR 2
++                final boolean isActive = org.spigotmc.ActivationRange.checkIfActive(passenger);
++                co.aikar.timings.Timing timer = isActive ? passenger.getType().passengerTickTimer.startTiming() : passenger.getType().passengerInactiveTickTimer.startTiming(); // Paper
++                try {
++                // Paper end
+                 passenger.setOldPosAndRot();
+                 ++passenger.tickCount;
+                 ProfilerFiller gameprofilerfiller = this.getProfiler();
+@@ -1010,8 +1017,17 @@ public class ServerLevel extends Level implements WorldGenLevel {
+                     return Registry.ENTITY_TYPE.getKey(passenger.getType()).toString();
+                 });
+                 gameprofilerfiller.incrementCounter("tickPassenger");
++                // Paper start - EAR 2
++                if (isActive) {
+                 passenger.rideTick();
+                 passenger.postTick(); // CraftBukkit
++                } else {
++                    passenger.setDeltaMovement(Vec3.ZERO);
++                    passenger.inactiveTick();
++                    // copied from inside of if (isPassenger()) of passengerTick, but that ifPassenger is unnecessary
++                    vehicle.positionRider(passenger);
++                }
++                // Paper end - EAR 2
+                 gameprofilerfiller.pop();
+                 Iterator iterator = passenger.getPassengers().iterator();
+ 
+@@ -1021,6 +1037,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
+                     this.tickPassenger(passenger, entity2);
+                 }
+ 
++            } finally { timer.stopTiming(); }// Paper - EAR2 timings
+             }
+         } else {
+             passenger.stopRiding();
+diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
+index d9feae255354f5577b5fa2b202f33bbc7e645867..d789a9068353c8e7be774c275d4d099283bf826c 100644
+--- a/src/main/java/net/minecraft/world/entity/Entity.java
++++ b/src/main/java/net/minecraft/world/entity/Entity.java
+@@ -331,6 +331,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
+     public final org.spigotmc.ActivationRange.ActivationType activationType = org.spigotmc.ActivationRange.initializeEntityActivationType(this);
+     public final boolean defaultActivationState;
+     public long activatedTick = Integer.MIN_VALUE;
++    public long activatedImmunityTick = Integer.MIN_VALUE; // Paper
++    public boolean isTemporarilyActive = false; // Paper
+     public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
+     protected int numCollisions = 0; // Paper
+     public void inactiveTick() { }
+@@ -779,6 +781,8 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
+         } else {
+             this.wasOnFire = this.isOnFire();
+             if (movementType == MoverType.PISTON) {
++                this.activatedTick = Math.max(this.activatedTick, MinecraftServer.currentTick + 20); // Paper
++                this.activatedImmunityTick = Math.max(this.activatedImmunityTick, MinecraftServer.currentTick + 20);   // Paper
+                 movement = this.limitPistonMovement(movement);
+                 if (movement.equals(Vec3.ZERO)) {
+                     return;
+@@ -791,6 +795,13 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource, i
+                 this.stuckSpeedMultiplier = Vec3.ZERO;
+                 this.setDeltaMovement(Vec3.ZERO);
+             }
++            // Paper start - ignore movement changes while inactive.
++            if (isTemporarilyActive && !(this instanceof ItemEntity || this instanceof net.minecraft.world.entity.vehicle.AbstractMinecart) && movement == getDeltaMovement() && movementType == MoverType.SELF) {
++                setDeltaMovement(Vec3.ZERO);
++                this.level.getProfiler().pop();
++                return;
++            }
++            // Paper end
+ 
+             movement = this.maybeBackOffFromEdge(movement, movementType);
+             Vec3 vec3d1 = this.collide(movement);
+diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
+index ad2ef9460d85b2182f6af35733daadcedbd15e4c..63b0044a86e6830ccf9d6da8e29989de1402dff4 100644
+--- a/src/main/java/net/minecraft/world/entity/Mob.java
++++ b/src/main/java/net/minecraft/world/entity/Mob.java
+@@ -206,6 +206,19 @@ public abstract class Mob extends LivingEntity {
+         return this.lookControl;
+     }
+ 
++    // Paper start
++    @Override
++    public void inactiveTick() {
++        super.inactiveTick();
++        if (this.goalSelector.inactiveTick()) {
++            this.goalSelector.tick();
++        }
++        if (this.targetSelector.inactiveTick()) {
++            this.targetSelector.tick();
++        }
++    }
++    // Paper end
++
+     public MoveControl getMoveControl() {
+         if (this.isPassenger() && this.getVehicle() instanceof Mob) {
+             Mob entityinsentient = (Mob) this.getVehicle();
+diff --git a/src/main/java/net/minecraft/world/entity/PathfinderMob.java b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
+index ff458abb221daaddaa734811eaaa35ea43883343..d1ab31d03ae421e628448fe2492ff138dc57c00f 100644
+--- a/src/main/java/net/minecraft/world/entity/PathfinderMob.java
++++ b/src/main/java/net/minecraft/world/entity/PathfinderMob.java
+@@ -19,6 +19,7 @@ public abstract class PathfinderMob extends Mob {
+     }
+ 
+     public org.bukkit.craftbukkit.entity.CraftCreature getBukkitCreature() { return (org.bukkit.craftbukkit.entity.CraftCreature) super.getBukkitEntity(); } // Paper
++    public BlockPos movingTarget = null; public BlockPos getMovingTarget() { return movingTarget; } // Paper
+ 
+     public float getWalkTargetValue(BlockPos pos) {
+         return this.getWalkTargetValue(pos, this.level);
+diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java b/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
+index 30bf98ad7fad6c6fdc8bc48e9f4caa0443cdb31c..2bb32378b19a21c94ff3ec8ed32fc9d6f0ad0fdb 100644
+--- a/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
++++ b/src/main/java/net/minecraft/world/entity/ai/goal/GoalSelector.java
+@@ -33,6 +33,7 @@ public class GoalSelector {
+     private final EnumSet<Goal.Flag> disabledFlags = EnumSet.noneOf(Goal.Flag.class);
+     private int tickCount;
+     private int newGoalRate = 3;
++    private int curRate;
+ 
+     public GoalSelector(Supplier<ProfilerFiller> profiler) {
+         this.profiler = profiler;
+@@ -47,6 +48,20 @@ public class GoalSelector {
+         this.availableGoals.clear();
+     }
+ 
++    // Paper start
++    public boolean inactiveTick() {
++        this.curRate++;
++        return this.curRate % this.newGoalRate == 0;
++    }
++    public boolean hasTasks() {
++        for (WrappedGoal task : this.availableGoals) {
++            if (task.isRunning()) {
++                return true;
++            }
++        }
++        return false;
++    }
++    // Paper end
+     public void removeGoal(Goal goal) {
+         this.availableGoals.stream().filter((wrappedGoal) -> {
+             return wrappedGoal.getGoal() == goal;
+diff --git a/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java b/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
+index 8d8cce87acc5a93afb4b8925a5a5dbf71d371fcd..7fc40bb5fb6265b283c7c611f63aae76302c0eaf 100644
+--- a/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
++++ b/src/main/java/net/minecraft/world/entity/ai/goal/MoveToBlockGoal.java
+@@ -14,7 +14,7 @@ public abstract class MoveToBlockGoal extends Goal {
+     protected int nextStartTick;
+     protected int tryTicks;
+     private int maxStayTicks;
+-    protected BlockPos blockPos = BlockPos.ZERO; @Deprecated public final BlockPos getTargetPosition() { return this.blockPos; } // Paper - OBFHELPER
++    protected BlockPos blockPos = BlockPos.ZERO; @Deprecated public final BlockPos getTargetPosition() { return this.blockPos; } @Deprecated public void setTargetPosition(BlockPos pos) { this.blockPos = pos; mob.movingTarget = pos != BlockPos.ZERO ? pos : null; } // Paper - OBFHELPER
+     private boolean reachedTarget;
+     private final int searchRange;
+     private final int verticalSearchRange;
+@@ -23,6 +23,13 @@ public abstract class MoveToBlockGoal extends Goal {
+     public MoveToBlockGoal(PathfinderMob mob, double speed, int range) {
+         this(mob, speed, range, 1);
+     }
++    // Paper start - activation range improvements
++    @Override
++    public void stop() {
++        super.stop();
++        setTargetPosition(BlockPos.ZERO);
++    }
++    // Paper end
+ 
+     public MoveToBlockGoal(PathfinderMob mob, double speed, int range, int maxYDifference) {
+         this.mob = mob;
+@@ -114,6 +121,7 @@ public abstract class MoveToBlockGoal extends Goal {
+                         mutableBlockPos.setWithOffset(blockPos, m, k - 1, n);
+                         if (this.mob.isWithinRestriction(mutableBlockPos) && this.isValidTarget(this.mob.level, mutableBlockPos)) {
+                             this.blockPos = mutableBlockPos;
++                            setTargetPosition(mutableBlockPos.immutable()); // Paper
+                             return true;
+                         }
+                     }
+diff --git a/src/main/java/net/minecraft/world/entity/npc/Villager.java b/src/main/java/net/minecraft/world/entity/npc/Villager.java
+index 55e4e7fcefc60e66239035e72ad44e0c796bf300..785fcb94d707b6790ef2191f7c9db77d253e9c6d 100644
+--- a/src/main/java/net/minecraft/world/entity/npc/Villager.java
++++ b/src/main/java/net/minecraft/world/entity/npc/Villager.java
+@@ -223,17 +223,29 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
+     @Override
+     public void inactiveTick() {
+         // SPIGOT-3874, SPIGOT-3894, SPIGOT-3846, SPIGOT-5286 :(
+-        if (level.spigotConfig.tickInactiveVillagers && this.isEffectiveAi()) {
+-            this.customServerAiStep();
++        // Paper start
++        if (this.getUnhappyCounter() > 0) {
++            this.setUnhappyCounter(this.getUnhappyCounter() - 1);
++        }
++        if (this.isEffectiveAi()) {
++            if (level.spigotConfig.tickInactiveVillagers) {
++                this.customServerAiStep();
++            } else {
++                this.mobTick(true);
++            }
+         }
++        maybeDecayGossip();
++        // Paper end
++
+         super.inactiveTick();
+     }
+     // Spigot End
+ 
+     @Override
+-    protected void customServerAiStep() {
++    protected void customServerAiStep() { mobTick(false); }
++    protected void mobTick(boolean inactive) {
+         this.level.getProfiler().push("villagerBrain");
+-        this.getBrain().tick((ServerLevel) this.level, this);
++        if (!inactive) this.getBrain().tick((ServerLevel) this.level, this); // Paper
+         this.level.getProfiler().pop();
+         if (this.assignProfessionWhenSpawned) {
+             this.assignProfessionWhenSpawned = false;
+@@ -257,7 +269,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
+             this.lastTradedPlayer = null;
+         }
+ 
+-        if (!this.isNoAi() && this.random.nextInt(100) == 0) {
++        if (!inactive && !this.isNoAi() && this.random.nextInt(100) == 0) { // Paper
+             Raid raid = ((ServerLevel) this.level).getRaidAt(this.blockPosition());
+ 
+             if (raid != null && raid.isActive() && !raid.isOver()) {
+@@ -268,6 +280,7 @@ public class Villager extends AbstractVillager implements ReputationEventHandler
+         if (this.getVillagerData().getProfession() == VillagerProfession.NONE && this.isTrading()) {
+             this.stopTrading();
+         }
++        if (inactive) return; // Paper
+ 
+         super.customServerAiStep();
+     }
+diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
+index faaa93e77523fbb942690491687410df48899ddb..de7abae207b0a565a25fa4ed2f66b94c6b0cdcf9 100644
+--- a/src/main/java/net/minecraft/world/level/Level.java
++++ b/src/main/java/net/minecraft/world/level/Level.java
+@@ -157,6 +157,12 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
+     public long ticksPerWaterAmbientSpawns;
+     public long ticksPerWaterUndergroundCreatureSpawns;
+     public long ticksPerAmbientSpawns;
++    // Paper start
++    public int wakeupInactiveRemainingAnimals;
++    public int wakeupInactiveRemainingFlying;
++    public int wakeupInactiveRemainingMonsters;
++    public int wakeupInactiveRemainingVillagers;
++    // Paper end
+     public boolean populating;
+     public final org.spigotmc.SpigotWorldConfig spigotConfig; // Spigot
+ 
+diff --git a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+index 03b82d12325d54b9e5ac66b357d7995970c4cd4b..e2ea913f9e5ae2351f10e0ebedba89d2a6e62d96 100644
+--- a/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
++++ b/src/main/java/net/minecraft/world/level/block/piston/PistonMovingBlockEntity.java
+@@ -140,6 +140,10 @@ public class PistonMovingBlockEntity extends BlockEntity {
+                                 }
+ 
+                                 entity.setDeltaMovement(e, g, h);
++                                // Paper - EAR items stuck in in slime pushed by a piston
++                                entity.activatedTick = Math.max(entity.activatedTick, net.minecraft.server.MinecraftServer.currentTick + 10);
++                                entity.activatedImmunityTick = Math.max(entity.activatedImmunityTick, net.minecraft.server.MinecraftServer.currentTick + 10);
++                                // Paper end
+                                 break;
+                             }
+                         }
+diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
+index 84ce3d38d5decb4a2f9fae78e0ef5d715860dc7d..e0302f82356e8cba848aa8cec1e821e02abbd6f6 100644
+--- a/src/main/java/org/spigotmc/ActivationRange.java
++++ b/src/main/java/org/spigotmc/ActivationRange.java
+@@ -1,39 +1,51 @@
+ package org.spigotmc;
+ 
+-import java.util.Collection;
++import net.minecraft.core.BlockPos;
+ import net.minecraft.server.MinecraftServer;
++import net.minecraft.server.level.ServerChunkCache;
+ import net.minecraft.world.entity.Entity;
++import net.minecraft.world.entity.FlyingMob;
+ import net.minecraft.world.entity.LightningBolt;
+ import net.minecraft.world.entity.LivingEntity;
++import net.minecraft.world.entity.Mob;
+ import net.minecraft.world.entity.PathfinderMob;
++import net.minecraft.world.entity.ai.Brain;
+ import net.minecraft.world.entity.ambient.AmbientCreature;
+ import net.minecraft.world.entity.animal.Animal;
++import net.minecraft.world.entity.animal.Bee;
+ import net.minecraft.world.entity.animal.Sheep;
++import net.minecraft.world.entity.animal.WaterAnimal;
++import net.minecraft.world.entity.animal.horse.Llama;
+ import net.minecraft.world.entity.boss.EnderDragonPart;
+ import net.minecraft.world.entity.boss.enderdragon.EndCrystal;
+ import net.minecraft.world.entity.boss.enderdragon.EnderDragon;
+ import net.minecraft.world.entity.boss.wither.WitherBoss;
+ import net.minecraft.world.entity.item.PrimedTnt;
+ import net.minecraft.world.entity.monster.Creeper;
+-import net.minecraft.world.entity.monster.Monster;
+-import net.minecraft.world.entity.monster.Slime;
++import net.minecraft.world.entity.monster.Enemy;
++import net.minecraft.world.entity.monster.Pillager;
+ import net.minecraft.world.entity.npc.Villager;
+ import net.minecraft.world.entity.player.Player;
+ import net.minecraft.world.entity.projectile.AbstractArrow;
+ import net.minecraft.world.entity.projectile.AbstractHurtingProjectile;
++import net.minecraft.world.entity.projectile.EyeOfEnder;
+ import net.minecraft.world.entity.projectile.FireworkRocketEntity;
+ import net.minecraft.world.entity.projectile.ThrowableProjectile;
+ import net.minecraft.world.entity.projectile.ThrownTrident;
+ import net.minecraft.world.entity.raid.Raider;
++import co.aikar.timings.MinecraftTimings;
++import net.minecraft.world.entity.schedule.Activity;
+ import net.minecraft.world.level.Level;
+ import net.minecraft.world.phys.AABB;
+-import co.aikar.timings.MinecraftTimings;
+ 
+ public class ActivationRange
+ {
+ 
+     public enum ActivationType
+     {
++        WATER, // Paper
++        FLYING_MONSTER, // Paper
++        VILLAGER, // Paper
+         MONSTER,
+         ANIMAL,
+         RAIDER,
+@@ -41,6 +53,43 @@ public class ActivationRange
+ 
+         AABB boundingBox = new AABB( 0, 0, 0, 0, 0, 0 );
+     }
++    // Paper start
++
++    static Activity[] VILLAGER_PANIC_IMMUNITIES = {
++        Activity.HIDE,
++        Activity.PRE_RAID,
++        Activity.RAID,
++        Activity.PANIC
++    };
++
++    private static int checkInactiveWakeup(Entity entity) {
++        Level world = entity.level;
++        SpigotWorldConfig config = world.spigotConfig;
++        long inactiveFor = MinecraftServer.currentTick - entity.activatedTick;
++        if (entity.activationType == ActivationType.VILLAGER) {
++            if (inactiveFor > config.wakeUpInactiveVillagersEvery && world.wakeupInactiveRemainingVillagers > 0) {
++                world.wakeupInactiveRemainingVillagers--;
++                return config.wakeUpInactiveVillagersFor;
++            }
++        } else if (entity.activationType == ActivationType.ANIMAL) {
++            if (inactiveFor > config.wakeUpInactiveAnimalsEvery && world.wakeupInactiveRemainingAnimals > 0) {
++                world.wakeupInactiveRemainingAnimals--;
++                return config.wakeUpInactiveAnimalsFor;
++            }
++        } else if (entity.activationType == ActivationType.FLYING_MONSTER) {
++            if (inactiveFor > config.wakeUpInactiveFlyingEvery && world.wakeupInactiveRemainingFlying > 0) {
++                world.wakeupInactiveRemainingFlying--;
++                return config.wakeUpInactiveFlyingFor;
++            }
++        } else if (entity.activationType == ActivationType.MONSTER || entity.activationType == ActivationType.RAIDER) {
++            if (inactiveFor > config.wakeUpInactiveMonstersEvery && world.wakeupInactiveRemainingMonsters > 0) {
++                world.wakeupInactiveRemainingMonsters--;
++                return config.wakeUpInactiveMonstersFor;
++            }
++        }
++        return -1;
++    }
++    // Paper end
+ 
+     static AABB maxBB = new AABB( 0, 0, 0, 0, 0, 0 );
+ 
+@@ -53,10 +102,13 @@ public class ActivationRange
+      */
+     public static ActivationType initializeEntityActivationType(Entity entity)
+     {
++        if (entity instanceof WaterAnimal) { return ActivationType.WATER; } // Paper
++        else if (entity instanceof Villager) { return ActivationType.VILLAGER; } // Paper
++        else if (entity instanceof FlyingMob && entity instanceof Enemy) { return ActivationType.FLYING_MONSTER; } // Paper - doing & Monster incase Flying no longer includes monster in future
+         if ( entity instanceof Raider )
+         {
+             return ActivationType.RAIDER;
+-        } else if ( entity instanceof Monster || entity instanceof Slime )
++        } else if ( entity instanceof Enemy ) // Paper - correct monster check
+         {
+             return ActivationType.MONSTER;
+         } else if ( entity instanceof PathfinderMob || entity instanceof AmbientCreature )
+@@ -77,10 +129,14 @@ public class ActivationRange
+      */
+     public static boolean initializeEntityActivationState(Entity entity, SpigotWorldConfig config)
+     {
+-        if ( ( entity.activationType == ActivationType.MISC && config.miscActivationRange == 0 )
+-                || ( entity.activationType == ActivationType.RAIDER && config.raiderActivationRange == 0 )
+-                || ( entity.activationType == ActivationType.ANIMAL && config.animalActivationRange == 0 )
+-                || ( entity.activationType == ActivationType.MONSTER && config.monsterActivationRange == 0 )
++        if ( ( entity.activationType == ActivationType.MISC && config.miscActivationRange <= 0 )
++                || ( entity.activationType == ActivationType.RAIDER && config.raiderActivationRange <= 0 )
++                || ( entity.activationType == ActivationType.ANIMAL && config.animalActivationRange <= 0 )
++                || ( entity.activationType == ActivationType.MONSTER && config.monsterActivationRange <= 0 )
++                || ( entity.activationType == ActivationType.VILLAGER && config.villagerActivationRange <= 0 ) // Paper
++                || ( entity.activationType == ActivationType.WATER && config.waterActivationRange <= 0 ) // Paper
++                || ( entity.activationType == ActivationType.FLYING_MONSTER && config.flyingMonsterActivationRange <= 0 ) // Paper
++                || entity instanceof EyeOfEnder // Paper
+                 || entity instanceof Player
+                 || entity instanceof ThrowableProjectile
+                 || entity instanceof EnderDragon
+@@ -113,10 +169,25 @@ public class ActivationRange
+         final int raiderActivationRange = world.spigotConfig.raiderActivationRange;
+         final int animalActivationRange = world.spigotConfig.animalActivationRange;
+         final int monsterActivationRange = world.spigotConfig.monsterActivationRange;
++        // Paper start
++        final int waterActivationRange = world.spigotConfig.waterActivationRange;
++        final int flyingActivationRange = world.spigotConfig.flyingMonsterActivationRange;
++        final int villagerActivationRange = world.spigotConfig.villagerActivationRange;
++        world.wakeupInactiveRemainingAnimals = Math.min(world.wakeupInactiveRemainingAnimals + 1, world.spigotConfig.wakeUpInactiveAnimals);
++        world.wakeupInactiveRemainingVillagers = Math.min(world.wakeupInactiveRemainingVillagers + 1, world.spigotConfig.wakeUpInactiveVillagers);
++        world.wakeupInactiveRemainingMonsters = Math.min(world.wakeupInactiveRemainingMonsters + 1, world.spigotConfig.wakeUpInactiveMonsters);
++        world.wakeupInactiveRemainingFlying = Math.min(world.wakeupInactiveRemainingFlying + 1, world.spigotConfig.wakeUpInactiveFlying);
++        final ServerChunkCache chunkProvider = (ServerChunkCache) world.getChunkSource();
++        // Paper end
+ 
+         int maxRange = Math.max( monsterActivationRange, animalActivationRange );
+         maxRange = Math.max( maxRange, raiderActivationRange );
+         maxRange = Math.max( maxRange, miscActivationRange );
++        // Paper start
++        maxRange = Math.max( maxRange, flyingActivationRange );
++        maxRange = Math.max( maxRange, waterActivationRange );
++        maxRange = Math.max( maxRange, villagerActivationRange );
++        // Paper end
+         maxRange = Math.min( ( world.spigotConfig.viewDistance << 4 ) - 8, maxRange );
+ 
+         for ( Player player : world.players() )
+@@ -128,6 +199,11 @@ public class ActivationRange
+             ActivationType.RAIDER.boundingBox = player.getBoundingBox().inflate( raiderActivationRange, 256, raiderActivationRange );
+             ActivationType.ANIMAL.boundingBox = player.getBoundingBox().inflate( animalActivationRange, 256, animalActivationRange );
+             ActivationType.MONSTER.boundingBox = player.getBoundingBox().inflate( monsterActivationRange, 256, monsterActivationRange );
++            // Paper start
++            ActivationType.WATER.boundingBox = player.getBoundingBox().inflate( waterActivationRange, 256, waterActivationRange );
++            ActivationType.FLYING_MONSTER.boundingBox = player.getBoundingBox().inflate( flyingActivationRange, 256, flyingActivationRange );
++            ActivationType.VILLAGER.boundingBox = player.getBoundingBox().inflate( villagerActivationRange, 256, villagerActivationRange );
++            // Paper end
+ 
+             world.getEntities().get(maxBB, ActivationRange::activateEntity);
+         }
+@@ -162,56 +238,108 @@ public class ActivationRange
+      * @param entity
+      * @return
+      */
+-    public static boolean checkEntityImmunities(Entity entity)
++    public static int checkEntityImmunities(Entity entity) // Paper - return # of ticks to get immunity
+     {
++        // Paper start
++        SpigotWorldConfig config = entity.level.spigotConfig;
++        int inactiveWakeUpImmunity = checkInactiveWakeup(entity);
++        if (inactiveWakeUpImmunity > -1) {
++            return inactiveWakeUpImmunity;
++        }
++        if (entity.remainingFireTicks > 0) {
++            return 2;
++        }
++        if (entity.activatedImmunityTick >= MinecraftServer.currentTick) {
++            return 1;
++        }
++        long inactiveFor = MinecraftServer.currentTick - entity.activatedTick;
++        // Paper end
+         // quick checks.
+-        if ( entity.wasTouchingWater || entity.remainingFireTicks > 0 )
++        if ( (entity.activationType != ActivationType.WATER && entity.wasTouchingWater && entity.isPushedByFluid()) ) // Paper
+         {
+-            return true;
++            return 100; // Paper
+         }
+         if ( !( entity instanceof AbstractArrow ) )
+         {
+-            if ( !entity.isOnGround() || !entity.passengers.isEmpty() || entity.isPassenger() )
++            if ( (!entity.isOnGround() && !(entity instanceof FlyingMob)) ) // Paper - remove passengers logic
+             {
+-                return true;
++                return 10; // Paper
+             }
+         } else if ( !( (AbstractArrow) entity ).inGround )
+         {
+-            return true;
++            return 1; // Paper
+         }
+         // special cases.
+         if ( entity instanceof LivingEntity )
+         {
+             LivingEntity living = (LivingEntity) entity;
+-            if ( /*TODO: Missed mapping? living.attackTicks > 0 || */ living.hurtTime > 0 || living.activeEffects.size() > 0 )
++            if ( living.onClimbable() || living.jumping || living.hurtTime > 0 || living.activeEffects.size() > 0 ) // Paper
+             {
+-                return true;
++                return 1; // Paper
+             }
+-            if ( entity instanceof PathfinderMob && ( (PathfinderMob) entity ).getTarget() != null )
++            if ( entity instanceof Mob && ((Mob) entity ).getTarget() != null) // Paper
+             {
+-                return true;
++                return 20; // Paper
+             }
+-            if ( entity instanceof Villager && ( (Villager) entity ).canBreed() )
++            // Paper start
++            if (entity instanceof Bee) {
++                Bee bee = (Bee)entity;
++                BlockPos movingTarget = bee.getMovingTarget();
++                if (bee.isAngry() ||
++                    (bee.getHivePos() != null && bee.getHivePos().equals(movingTarget)) ||
++                    (bee.getSavedFlowerPos() != null && bee.getSavedFlowerPos().equals(movingTarget))
++                ) {
++                    return 20;
++                }
++            }
++            if ( entity instanceof Villager ) {
++                Brain<Villager> behaviorController = ((Villager) entity).getBrain();
++
++                if (config.villagersActiveForPanic) {
++                    for (Activity activity : VILLAGER_PANIC_IMMUNITIES) {
++                        if (behaviorController.isActive(activity)) {
++                            return 20*5;
++                        }
++                    }
++                }
++
++                if (config.villagersWorkImmunityAfter > 0 && inactiveFor >= config.villagersWorkImmunityAfter) {
++                    if (behaviorController.isActive(Activity.WORK)) {
++                        return config.villagersWorkImmunityFor;
++                    }
++                }
++            }
++            if ( entity instanceof Llama && ( (Llama) entity ).inCaravan() )
+             {
+-                return true;
++                return 1;
+             }
++            // Paper end
+             if ( entity instanceof Animal )
+             {
+                 Animal animal = (Animal) entity;
+                 if ( animal.isBaby() || animal.isInLove() )
+                 {
+-                    return true;
++                    return 5; // Paper
+                 }
+                 if ( entity instanceof Sheep && ( (Sheep) entity ).isSheared() )
+                 {
+-                    return true;
++                    return 1; // Paper
+                 }
+             }
+             if (entity instanceof Creeper && ((Creeper) entity).isIgnited()) { // isExplosive
+-                return true;
++                return 20; // Paper
++            }
++            // Paper start
++            if (entity instanceof Mob && ((Mob) entity).targetSelector.hasTasks() ) {
++                return 0;
++            }
++            if (entity instanceof Pillager) {
++                Pillager pillager = (Pillager) entity;
++                // TODO:?
+             }
++            // Paper end
+         }
+-        return false;
++        return -1; // Paper
+     }
+ 
+     /**
+@@ -226,8 +354,19 @@ public class ActivationRange
+         if ( entity instanceof FireworkRocketEntity ) {
+             return true;
+         }
++        // Paper start - special case always immunities
++        // immunize brand new entities, dead entities, and portal scenarios
++        if (entity.defaultActivationState || entity.tickCount < 20*10 || !entity.isAlive() || entity.isInsidePortal || entity.portalCooldown > 0) {
++            return true;
++        }
++        // immunize leashed entities
++        if (entity instanceof Mob && ((Mob)entity).leashHolder instanceof Player) {
++            return true;
++        }
++        // Paper end
+ 
+-        boolean isActive = entity.activatedTick >= MinecraftServer.currentTick || entity.defaultActivationState;
++        boolean isActive = entity.activatedTick >= MinecraftServer.currentTick;
++        entity.isTemporarilyActive = false; // Paper
+ 
+         // Should this entity tick?
+         if ( !isActive )
+@@ -235,15 +374,19 @@ public class ActivationRange
+             if ( ( MinecraftServer.currentTick - entity.activatedTick - 1 ) % 20 == 0 )
+             {
+                 // Check immunities every 20 ticks.
+-                if ( ActivationRange.checkEntityImmunities( entity ) )
+-                {
+-                    // Triggered some sort of immunity, give 20 full ticks before we check again.
+-                    entity.activatedTick = MinecraftServer.currentTick + 20;
++                // Paper start
++                int immunity = checkEntityImmunities(entity);
++                if (immunity >= 0) {
++                    entity.activatedTick = MinecraftServer.currentTick + immunity;
++                } else {
++                    entity.isTemporarilyActive = true;
+                 }
++                // Paper end
+                 isActive = true;
++
+             }
+             // Add a little performance juice to active entities. Skip 1/4 if not immune.
+-        } else if ( !entity.defaultActivationState && entity.tickCount % 4 == 0 && !ActivationRange.checkEntityImmunities( entity ) )
++        } else if ( entity.tickCount % 4 == 0 && ActivationRange.checkEntityImmunities( entity ) < 0 ) // Paper
+         {
+             isActive = false;
+         }
+diff --git a/src/main/java/org/spigotmc/SpigotWorldConfig.java b/src/main/java/org/spigotmc/SpigotWorldConfig.java
+index ee8c84770b9b7fb9f3763e378f399da58f042b06..6d36aa5006d3adc3ff30d196bdfd287ad38a564a 100644
+--- a/src/main/java/org/spigotmc/SpigotWorldConfig.java
++++ b/src/main/java/org/spigotmc/SpigotWorldConfig.java
+@@ -193,13 +193,59 @@ public class SpigotWorldConfig
+     public int monsterActivationRange = 32;
+     public int raiderActivationRange = 48;
+     public int miscActivationRange = 16;
++    // Paper start
++    public int flyingMonsterActivationRange = 32;
++    public int waterActivationRange = 16;
++    public int villagerActivationRange = 32;
++    public int wakeUpInactiveAnimals = 4;
++    public int wakeUpInactiveAnimalsEvery = 60*20;
++    public int wakeUpInactiveAnimalsFor = 5*20;
++    public int wakeUpInactiveMonsters = 8;
++    public int wakeUpInactiveMonstersEvery = 20*20;
++    public int wakeUpInactiveMonstersFor = 5*20;
++    public int wakeUpInactiveVillagers = 4;
++    public int wakeUpInactiveVillagersEvery = 30*20;
++    public int wakeUpInactiveVillagersFor = 5*20;
++    public int wakeUpInactiveFlying = 8;
++    public int wakeUpInactiveFlyingEvery = 10*20;
++    public int wakeUpInactiveFlyingFor = 5*20;
++    public int villagersWorkImmunityAfter = 5*20;
++    public int villagersWorkImmunityFor = 20;
++    public boolean villagersActiveForPanic = true;
++    // Paper end
+     public boolean tickInactiveVillagers = true;
+     private void activationRange()
+     {
++        boolean hasAnimalsConfig = config.getInt("entity-activation-range.animals", this.animalActivationRange) != this.animalActivationRange; // Paper
+         this.animalActivationRange = this.getInt( "entity-activation-range.animals", this.animalActivationRange );
+         this.monsterActivationRange = this.getInt( "entity-activation-range.monsters", this.monsterActivationRange );
+         this.raiderActivationRange = this.getInt( "entity-activation-range.raiders", this.raiderActivationRange );
+         this.miscActivationRange = this.getInt( "entity-activation-range.misc", this.miscActivationRange );
++        // Paper start
++        this.waterActivationRange = this.getInt( "entity-activation-range.water", this.waterActivationRange );
++        this.villagerActivationRange = this.getInt( "entity-activation-range.villagers", hasAnimalsConfig ? this.animalActivationRange : this.villagerActivationRange );
++        this.flyingMonsterActivationRange = this.getInt( "entity-activation-range.flying-monsters", this.flyingMonsterActivationRange );
++
++        this.wakeUpInactiveAnimals = this.getInt("entity-activation-range.wake-up-inactive.animals-max-per-tick", this.wakeUpInactiveAnimals);
++        this.wakeUpInactiveAnimalsEvery = this.getInt("entity-activation-range.wake-up-inactive.animals-every", this.wakeUpInactiveAnimalsEvery);
++        this.wakeUpInactiveAnimalsFor = this.getInt("entity-activation-range.wake-up-inactive.animals-for", this.wakeUpInactiveAnimalsFor);
++
++        this.wakeUpInactiveMonsters = this.getInt("entity-activation-range.wake-up-inactive.monsters-max-per-tick", this.wakeUpInactiveMonsters);
++        this.wakeUpInactiveMonstersEvery = this.getInt("entity-activation-range.wake-up-inactive.monsters-every", this.wakeUpInactiveMonstersEvery);
++        this.wakeUpInactiveMonstersFor = this.getInt("entity-activation-range.wake-up-inactive.monsters-for", this.wakeUpInactiveMonstersFor);
++
++        this.wakeUpInactiveVillagers = this.getInt("entity-activation-range.wake-up-inactive.villagers-max-per-tick", this.wakeUpInactiveVillagers);
++        this.wakeUpInactiveVillagersEvery = this.getInt("entity-activation-range.wake-up-inactive.villagers-every", this.wakeUpInactiveVillagersEvery);
++        this.wakeUpInactiveVillagersFor = this.getInt("entity-activation-range.wake-up-inactive.villagers-for", this.wakeUpInactiveVillagersFor);
++
++        this.wakeUpInactiveFlying = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-max-per-tick", this.wakeUpInactiveFlying);
++        this.wakeUpInactiveFlyingEvery = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-every", this.wakeUpInactiveFlyingEvery);
++        this.wakeUpInactiveFlyingFor = this.getInt("entity-activation-range.wake-up-inactive.flying-monsters-for", this.wakeUpInactiveFlyingFor);
++
++        this.villagersWorkImmunityAfter = this.getInt( "entity-activation-range.villagers-work-immunity-after", this.villagersWorkImmunityAfter );
++        this.villagersWorkImmunityFor = this.getInt( "entity-activation-range.villagers-work-immunity-for", this.villagersWorkImmunityFor );
++        this.villagersActiveForPanic = this.getBoolean( "entity-activation-range.villagers-active-for-panic", this.villagersActiveForPanic );
++        // Paper end
+         this.tickInactiveVillagers = this.getBoolean( "entity-activation-range.tick-inactive-villagers", this.tickInactiveVillagers );
+         this.log( "Entity Activation Range: An " + this.animalActivationRange + " / Mo " + this.monsterActivationRange + " / Ra " + this.raiderActivationRange + " / Mi " + this.miscActivationRange + " / Tiv " + this.tickInactiveVillagers );
+     }

patches/server/0359-Increase-Light-Queue-Size.patch

@@ -0,0 +1,43 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Wed, 8 Apr 2020 21:24:05 -0400
+Subject: [PATCH] Increase Light Queue Size
+
+Wiz mentioned that large WorldEdit operations cause light to run on
+main thread. The queue was small, set to 5.. this bumps it to 20
+but makes it configurable per-world.
+
+The main risk of increasing this higher is during shutdown, some
+queued light updates may be lost because mojang did not flush the
+light engine on shutdown...
+
+The queue size only puts a cap on max loss, doesn't solve that problem.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+index 1dba00531e909214119219e928b2875676c00e75..7a97a4a395f20680bc3b028586c9a17b84783d99 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
++++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+@@ -513,5 +513,10 @@ public class PaperWorldConfig {
+         hoppersIgnoreOccludingBlocks = getBoolean("hopper.ignore-occluding-blocks", hoppersIgnoreOccludingBlocks);
+         log("Hopper Ignore Occluding Blocks: " + (hoppersIgnoreOccludingBlocks ? "enabled" : "disabled"));
+     }
++
++    public int lightQueueSize = 20;
++    private void lightQueueSize() {
++        lightQueueSize = getInt("light-queue-size", lightQueueSize);
++    }
+ }
+ 
+diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
+index 4661d571cd4047c6b7d76de7ba0cb34ada348d63..758a972589b607447dc507c6c4f4b2a62f6a2832 100644
+--- a/src/main/java/net/minecraft/server/MinecraftServer.java
++++ b/src/main/java/net/minecraft/server/MinecraftServer.java
+@@ -812,7 +812,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
+         this.executeModerately();
+         // CraftBukkit end
+         if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper
+-        chunkproviderserver.getLightEngine().setTaskPerBatch(5);
++        chunkproviderserver.getLightEngine().setTaskPerBatch(worldserver.paperConfig.lightQueueSize); // Paper - increase light queue size
+         // CraftBukkit start
+         // this.updateMobSpawningFlags();
+         worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());

patches/server/0360-Fix-Light-Command.patch

@@ -0,0 +1,166 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Thu, 7 May 2020 19:17:36 -0400
+Subject: [PATCH] Fix Light Command
+
+This lets you run /paper fixlight <chunkRadius> (max 5) to automatically
+fix all light data in the chunks.
+
+diff --git a/src/main/java/com/destroystokyo/paper/PaperCommand.java b/src/main/java/com/destroystokyo/paper/PaperCommand.java
+index 005361c38b02713fb823d0be40954400d59f0c4d..3091c100eaf5a86ba270ef0d96de1852a2a0ac9e 100644
+--- a/src/main/java/com/destroystokyo/paper/PaperCommand.java
++++ b/src/main/java/com/destroystokyo/paper/PaperCommand.java
+@@ -10,7 +10,8 @@ import net.minecraft.server.MinecraftServer;
+ import net.minecraft.server.level.ChunkHolder;
+ import net.minecraft.server.level.ServerChunkCache;
+ import net.minecraft.server.level.ServerLevel;
+-import net.minecraft.world.entity.Entity;
++import net.minecraft.server.level.ServerPlayer;
++import net.minecraft.server.level.ThreadedLevelLightEngine;
+ import net.minecraft.world.entity.EntityType;
+ import net.minecraft.world.level.ChunkPos;
+ import net.minecraft.resources.ResourceLocation;
+@@ -25,15 +26,18 @@ import org.bukkit.command.Command;
+ import org.bukkit.command.CommandSender;
+ import org.bukkit.craftbukkit.CraftServer;
+ import org.bukkit.craftbukkit.CraftWorld;
++import org.bukkit.craftbukkit.entity.CraftPlayer;
+ import org.bukkit.entity.Player;
+ 
+ import java.io.File;
+ import java.time.LocalDateTime;
+ import java.time.format.DateTimeFormatter;
++import java.util.ArrayDeque;
+ import java.util.ArrayList;
+ import java.util.Arrays;
+ import java.util.Collection;
+ import java.util.Collections;
++import java.util.Deque;
+ import java.util.Iterator;
+ import java.util.List;
+ import java.util.Locale;
+@@ -43,7 +47,7 @@ import java.util.stream.Collectors;
+ 
+ public class PaperCommand extends Command {
+     private static final String BASE_PERM = "bukkit.command.paper.";
+-    private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo").build();
++    private static final ImmutableSet<String> SUBCOMMANDS = ImmutableSet.<String>builder().add("heap", "entity", "reload", "version", "debug", "chunkinfo", "fixlight").build();
+ 
+     public PaperCommand(String name) {
+         super(name);
+@@ -158,6 +162,9 @@ public class PaperCommand extends Command {
+             case "chunkinfo":
+                 doChunkInfo(sender, args);
+                 break;
++            case "fixlight":
++                this.doFixLight(sender, args);
++                break;
+             case "ver":
+                 if (!testPermission(sender, "version")) break; // "ver" needs a special check because it's an alias. All other commands are checked up before the switch statement (because they are present in the SUBCOMMANDS set)
+             case "version":
+@@ -413,4 +420,74 @@ public class PaperCommand extends Command {
+ 
+         Command.broadcastCommandMessage(sender, ChatColor.GREEN + "Paper config reload complete.");
+     }
++    private void doFixLight(CommandSender sender, String[] args) {
++        if (!(sender instanceof Player)) {
++            sender.sendMessage("Only players can use this command");
++            return;
++        }
++        int radius = 2;
++        if (args.length > 1) {
++            try {
++                radius = Math.min(5, Integer.parseInt(args[1]));
++            } catch (Exception e) {
++                sender.sendMessage("Not a number");
++                return;
++            }
++
++        }
++
++        CraftPlayer player = (CraftPlayer) sender;
++        ServerPlayer handle = player.getHandle();
++        ServerLevel world = (ServerLevel) handle.level;
++        ThreadedLevelLightEngine lightengine = world.getChunkSource().getLightEngine();
++
++        net.minecraft.core.BlockPos center = MCUtil.toBlockPosition(player.getLocation());
++        Deque<ChunkPos> queue = new ArrayDeque<>(MCUtil.getSpiralOutChunks(center, radius));
++        updateLight(sender, world, lightengine, queue);
++    }
++
++    private void updateLight(CommandSender sender, ServerLevel world, ThreadedLevelLightEngine lightengine, Deque<ChunkPos> queue) {
++        ChunkPos coord = queue.poll();
++        if (coord == null) {
++            sender.sendMessage("All Chunks Light updated");
++            return;
++        }
++        world.getChunkSource().getChunkAtAsynchronously(coord.x, coord.z, false, false).whenCompleteAsync((either, ex) -> {
++            if (ex != null) {
++                sender.sendMessage("Error loading chunk " + coord);
++                updateLight(sender, world, lightengine, queue);
++                return;
++            }
++            net.minecraft.world.level.chunk.LevelChunk chunk = (net.minecraft.world.level.chunk.LevelChunk) either.left().orElse(null);
++            if (chunk == null) {
++                updateLight(sender, world, lightengine, queue);
++                return;
++            }
++            lightengine.setTaskPerBatch(world.paperConfig.lightQueueSize + 16 * 256); // ensure full chunk can fit into queue
++            sender.sendMessage("Updating Light " + coord);
++            int cx = chunk.getPos().x << 4;
++            int cz = chunk.getPos().z << 4;
++            for (int y = 0; y < world.getHeight(); y++) {
++                for (int x = 0; x < 16; x++) {
++                    for (int z = 0; z < 16; z++) {
++                        net.minecraft.core.BlockPos pos = new net.minecraft.core.BlockPos(cx + x, y, cz + z);
++                        lightengine.checkBlock(pos);
++                    }
++                }
++            }
++            lightengine.tryScheduleUpdate();
++            ChunkHolder visibleChunk = world.getChunkSource().chunkMap.getVisibleChunkIfPresent(chunk.coordinateKey);
++            if (visibleChunk != null) {
++                world.getChunkSource().chunkMap.addLightTask(visibleChunk, () -> {
++                    MinecraftServer.getServer().processQueue.add(() -> {
++                        visibleChunk.broadcast(new net.minecraft.network.protocol.game.ClientboundLightUpdatePacket(chunk.getPos(), lightengine, null, null, true), false);
++                        updateLight(sender, world, lightengine, queue);
++                    });
++                });
++            } else {
++                updateLight(sender, world, lightengine, queue);
++            }
++            lightengine.setTaskPerBatch(world.paperConfig.lightQueueSize);
++        }, MinecraftServer.getServer());
++    }
+ }
+diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
+index 969401d1c4a506111ad212950bca42fdac59ad1f..f3f6fc973cd75a42594f1ec222c220e3894e11ee 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
++++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
+@@ -132,6 +132,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+     private final ChunkTaskPriorityQueueSorter queueSorter;
+     private final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> worldgenMailbox;
+     public final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> mainThreadMailbox;
++    // Paper start
++    final ProcessorHandle<ChunkTaskPriorityQueueSorter.Message<Runnable>> mailboxLight;
++    public void addLightTask(ChunkHolder playerchunk, Runnable run) {
++        this.mailboxLight.tell(ChunkTaskPriorityQueueSorter.message(playerchunk, run));
++    }
++    // Paper end
+     public final ChunkProgressListener progressListener;
+     private final ChunkStatusUpdateListener chunkStatusListener;
+     public final ChunkMap.ChunkDistanceManager distanceManager;
+@@ -240,11 +246,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+ 
+         this.progressListener = worldGenerationProgressListener;
+         this.chunkStatusListener = chunkStatusChangeListener;
+-        ProcessorMailbox<Runnable> threadedmailbox1 = ProcessorMailbox.create(executor, "light");
++        ProcessorMailbox<Runnable> lightthreaded; ProcessorMailbox<Runnable> threadedmailbox1 = lightthreaded = ProcessorMailbox.create(executor, "light"); // Paper
+ 
+         this.queueSorter = new ChunkTaskPriorityQueueSorter(ImmutableList.of(threadedmailbox, mailbox, threadedmailbox1), executor, Integer.MAX_VALUE);
+         this.worldgenMailbox = this.queueSorter.getProcessor(threadedmailbox, false);
+         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.overworldDataStorage = persistentStateManagerFactory;