[ci skip] Add more identifying patch comments

patches/api/Add-GameEvent-tags.patch

@@ -8,14 +8,6 @@ diff --git a/src/main/java/org/bukkit/Tag.java b/src/main/java/org/bukkit/Tag.ja
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/Tag.java
 +++ b/src/main/java/org/bukkit/Tag.java
-@@ -0,0 +0,0 @@ public interface Tag<T extends Keyed> extends Keyed {
-      * Vanilla tag representing entities which are dismounted when underwater.
-      */
-     Tag<EntityType> ENTITY_TYPES_DISMOUNTS_UNDERWATER = Bukkit.getTag(REGISTRY_ENTITY_TYPES, NamespacedKey.minecraft("dismounts_underwater"), EntityType.class);
-+
-     /**
-      * Vanilla tag representing entities which are not controlled by their mount.
-      */
 @@ -0,0 +0,0 @@ public interface Tag<T extends Keyed> extends Keyed {
       */
      Tag<EntityType> ENTITY_TYPES_CAN_TURN_IN_BOATS = Bukkit.getTag(REGISTRY_ENTITY_TYPES, NamespacedKey.minecraft("can_turn_in_boats"), EntityType.class);

patches/server/Actually-optimise-explosions.patch

@@ -371,7 +371,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -                            BlockPos blockposition = BlockPos.containing(d4, d5, d6);
 -                            BlockState iblockdata = this.level.getBlockState(blockposition);
 -                            if (!iblockdata.isDestroyable()) continue; // Paper - Protect Bedrock and End Portal/Frames from being destroyed
--                            FluidState fluid = iblockdata.getFluidState(); // Paper
+-                            FluidState fluid = iblockdata.getFluidState(); // Paper - Perf: Optimize call to getFluid for explosions
 +                            // Paper start - optimise explosions
 +                            final int blockX = Mth.floor(d4);
 +                            final int blockY = Mth.floor(d5);

patches/server/Add-Plugin-Tickets-to-API-Chunk-Methods.patch

@@ -115,7 +115,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        world.getChunkSource().addRegionTicket(TicketType.PLUGIN, chunkPos, 0, Unit.INSTANCE); // Paper
          world.getChunkSource().getChunk(x, z, ChunkStatus.FULL, true);
          return true;
-         // Paper end
+         // Paper end - Optimize this method
 @@ -0,0 +0,0 @@ public class CraftWorld extends CraftRegionAccessor implements World {
          io.papermc.paper.chunk.system.ChunkSystem.scheduleChunkLoad(this.getHandle(), x, z, gen, ChunkStatus.FULL, true, priority, (c) -> {
              net.minecraft.server.MinecraftServer.getServer().scheduleOnMain(() -> {

patches/server/Add-ThrownEggHatchEvent.patch

@@ -14,13 +14,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                      }
                  }
                  // CraftBukkit end
-+                // Paper start
++                // Paper start - Add ThrownEggHatchEvent
 +                com.destroystokyo.paper.event.entity.ThrownEggHatchEvent event = new com.destroystokyo.paper.event.entity.ThrownEggHatchEvent((org.bukkit.entity.Egg) getBukkitEntity(), hatching, b0, hatchingType);
 +                event.callEvent();
 +                hatching = event.isHatching();
 +                b0 = hatching ? event.getNumHatches() : 0; // If hatching is set to false, ensure child count is 0
 +                hatchingType = event.getHatchingType();
-+                // Paper end
++                // Paper end - Add ThrownEggHatchEvent
  
                  for (int i = 0; i < b0; ++i) {
                      Entity entitychicken = this.level().getWorld().makeEntity(new org.bukkit.Location(this.level().getWorld(), this.getX(), this.getY(), this.getZ(), this.getYRot(), 0.0F), hatchingType.getEntityClass()); // CraftBukkit

patches/server/Add-debug-for-sync-chunk-loads.patch

@@ -307,7 +307,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  // Paper start - async chunk io/loading
                  io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.pushChunkWait(this.level, x1, z1); // Paper - rewrite chunk system
                  // Paper end
-+                com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x1, z1); // Paper - sync load info
++                com.destroystokyo.paper.io.SyncLoadFinder.logSyncLoad(this.level, x1, z1); // Paper - Add debug for sync chunk loads
                  this.level.timings.syncChunkLoad.startTiming(); // Paper
              chunkproviderserver_b.managedBlock(completablefuture::isDone);
                  io.papermc.paper.chunk.system.scheduling.ChunkTaskScheduler.popChunkWait(); // Paper - async chunk debug  // Paper - rewrite chunk system

patches/server/Add-option-to-allow-iron-golems-to-spawn-in-air.patch

@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          BlockState iblockdata = world.getBlockState(blockposition1);
  
 -        if (!iblockdata.entityCanStandOn(world, blockposition1, this)) {
-+        if (!iblockdata.entityCanStandOn(world, blockposition1, this) && !this.level().paperConfig().entities.spawning.ironGolemsCanSpawnInAir) { // Paper
++        if (!iblockdata.entityCanStandOn(world, blockposition1, this) && !this.level().paperConfig().entities.spawning.ironGolemsCanSpawnInAir) { // Paper - Add option to allow iron golems to spawn in air
              return false;
          } else {
              for (int i = 1; i < 3; ++i) {

patches/server/Add-option-to-disable-pillager-patrols.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      @Override
      public int tick(ServerLevel world, boolean spawnMonsters, boolean spawnAnimals) {
-+        if (world.paperConfig().entities.behavior.pillagerPatrols.disable) return 0; // Paper
++        if (world.paperConfig().entities.behavior.pillagerPatrols.disable) return 0; // Paper - Add option to disable pillager patrols
          if (!spawnMonsters) {
              return 0;
          } else if (!world.getGameRules().getBoolean(GameRules.RULE_DO_PATROL_SPAWNING)) {

patches/server/Add-option-to-nerf-pigmen-from-nether-portals.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      // Paper start
      public long activatedImmunityTick = Integer.MIN_VALUE; // Paper
      public boolean isTemporarilyActive = false; // Paper
-+    public boolean fromNetherPortal; // Paper
++    public boolean fromNetherPortal; // Paper - Add option to nerf pigmen from nether portals
      protected int numCollisions = 0; // Paper
      public boolean spawnedViaMobSpawner; // Paper - Yes this name is similar to above, upstream took the better one
      @javax.annotation.Nullable
@@ -42,8 +42,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
                  if (entity != null) {
                      entity.setPortalCooldown();
-+                    entity.fromNetherPortal = true; // Paper
++                    entity.fromNetherPortal = true; // Paper - Add option to nerf pigmen from nether portals
-+                    if (world.paperConfig().entities.behavior.nerfPigmenFromNetherPortals) ((net.minecraft.world.entity.Mob) entity).aware = false; // Paper
++                    if (world.paperConfig().entities.behavior.nerfPigmenFromNetherPortals) ((net.minecraft.world.entity.Mob) entity).aware = false; // Paper - Add option to nerf pigmen from nether portals
                  }
              }
          }

patches/server/Add-paper-mobcaps-and-paper-playermobcaps.patch

@@ -275,7 +275,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    // Paper end - Add mobcaps commands
 +
      public static void spawnCategoryForChunk(MobCategory group, ServerLevel world, LevelChunk chunk, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner) {
-         // Paper start - add parameters and int ret type
+         // Paper start - Optional per player mob spawns
          spawnCategoryForChunk(group, world, chunk, checker, runner, Integer.MAX_VALUE, null);
 diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644

patches/server/Allow-Saving-of-Oversized-Chunks.patch

@@ -71,7 +71,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
 +    // Paper start
 +    private final byte[] oversized = new byte[1024];
-+    private int oversizedCount = 0;
++    private int oversizedCount;
 +
 +    private synchronized void initOversizedState() throws IOException {
 +        Path metaFile = getOversizedMetaFile();
@@ -153,22 +153,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        org.apache.logging.log4j.LogManager.getLogger().fatal(msg + " (" + file.toString().replaceAll(".+[\\\\/]", "") + " - " + x + "," + z + ") Go clean it up to remove this message. /minecraft:tp " + (x<<4)+" 128 "+(z<<4) + " - DO NOT REPORT THIS TO PAPER - You may ask for help on Discord, but do not file an issue. These error messages can not be removed.");
 +    }
 +
-+    private static final int DEFAULT_SIZE_THRESHOLD = 1024 * 8;
-+    private static final int OVERZEALOUS_TOTAL_THRESHOLD = 1024 * 64;
-+    private static final int OVERZEALOUS_THRESHOLD = 1024;
-+    private static int SIZE_THRESHOLD = DEFAULT_SIZE_THRESHOLD;
-+    private static void resetFilterThresholds() {
-+        SIZE_THRESHOLD = Math.max(1024 * 4, Integer.getInteger("Paper.FilterThreshhold", DEFAULT_SIZE_THRESHOLD));
-+    }
-+    static {
-+        resetFilterThresholds();
-+    }
-+
-+    static boolean isOverzealous() {
-+        return SIZE_THRESHOLD == OVERZEALOUS_THRESHOLD;
-+    }
-+
-+
 +    private static CompoundTag readOversizedChunk(RegionFile regionfile, ChunkPos chunkCoordinate) throws IOException {
 +        synchronized (regionfile) {
 +            try (DataInputStream datainputstream = regionfile.getChunkDataInputStream(chunkCoordinate)) {
@@ -199,18 +183,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            level.put(key, levelList);
 +        }
 +    }
-+
-+    private static int getNBTSize(net.minecraft.nbt.Tag nbtBase) {
-+        DataOutputStream test = new DataOutputStream(new org.apache.commons.io.output.NullOutputStream());
-+        try {
-+            nbtBase.write(test);
-+            return test.size();
-+        } catch (IOException e) {
-+            e.printStackTrace();
-+            return 0;
-+        }
-+    }
-+
 +    // Paper end
 +
      @Nullable

patches/server/Alternative-item-despawn-rate.patch

@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: kickash32 <kickash32@gmail.com>
 Date: Mon, 3 Jun 2019 02:02:39 -0400
-Subject: [PATCH] Implement alternative item-despawn-rate
+Subject: [PATCH] Alternative item-despawn-rate
 
 Co-authored-by: Noah van der Aa <ndvdaa@gmail.com>
 
@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public final float bobOffs;
      private int lastTick = MinecraftServer.currentTick - 1; // CraftBukkit
      public boolean canMobPickup = true; // Paper
-+    private int despawnRate = -1; // Paper
++    private int despawnRate = -1; // Paper - Alternative item-despawn-rate
  
      public ItemEntity(EntityType<? extends ItemEntity> type, Level world) {
          super(type, world);
@@ -22,7 +22,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              }
  
 -            if (!this.level().isClientSide && this.age >= this.level().spigotConfig.itemDespawnRate) { // Spigot
-+            if (!this.level().isClientSide && this.age >= this.despawnRate) { // Spigot // Paper
++            if (!this.level().isClientSide && this.age >= this.despawnRate) { // Spigot // Paper - Alternative item-despawn-rate
                  // CraftBukkit start - fire ItemDespawnEvent
                  if (CraftEventFactory.callItemDespawnEvent(this).isCancelled()) {
                      this.age = 0;
@@ -31,7 +31,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          // CraftBukkit end
  
 -        if (!this.level().isClientSide && this.age >= this.level().spigotConfig.itemDespawnRate) { // Spigot
-+        if (!this.level().isClientSide && this.age >= this.despawnRate) { // Spigot // Paper
++        if (!this.level().isClientSide && this.age >= this.despawnRate) { // Spigot // Paper - Alternative item-despawn-rate
              // CraftBukkit start - fire ItemDespawnEvent
              if (org.bukkit.craftbukkit.event.CraftEventFactory.callItemDespawnEvent(this).isCancelled()) {
                  this.age = 0;
@@ -40,7 +40,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          ItemStack itemstack = this.getItem();
  
 -        return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < 6000 && itemstack.getCount() < itemstack.getMaxStackSize();
-+        return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < this.despawnRate && itemstack.getCount() < itemstack.getMaxStackSize(); // Paper - respect despawn rate in pickup check.
++        return this.isAlive() && this.pickupDelay != 32767 && this.age != -32768 && this.age < this.despawnRate && itemstack.getCount() < itemstack.getMaxStackSize(); // Paper - Alternative item-despawn-rate
      }
  
      private void tryToMerge(ItemEntity other) {
@@ -48,7 +48,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      public void setItem(ItemStack stack) {
          this.getEntityData().set(ItemEntity.DATA_ITEM, stack);
-+        this.despawnRate = this.level().paperConfig().entities.spawning.altItemDespawnRate.enabled ? this.level().paperConfig().entities.spawning.altItemDespawnRate.items.getOrDefault(stack.getItem(), this.level().spigotConfig.itemDespawnRate) : this.level().spigotConfig.itemDespawnRate; // Paper
++        this.despawnRate = this.level().paperConfig().entities.spawning.altItemDespawnRate.enabled ? this.level().paperConfig().entities.spawning.altItemDespawnRate.items.getOrDefault(stack.getItem(), this.level().spigotConfig.itemDespawnRate) : this.level().spigotConfig.itemDespawnRate; // Paper - Alternative item-despawn-rate
      }
  
      @Override
@@ -57,7 +57,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public void makeFakeItem() {
          this.setNeverPickUp();
 -        this.age = this.level().spigotConfig.itemDespawnRate - 1; // Spigot
-+        this.age = this.despawnRate - 1; // Spigot // Paper
++        this.age = this.despawnRate - 1; // Spigot // Paper - Alternative item-despawn-rate
      }
  
      public float getSpin(float tickDelta) {

patches/server/Bees-get-gravity-in-void.-Fixes-MC-167279.patch

@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          super(type, world);
          this.remainingCooldownBeforeLocatingNewFlower = Mth.nextInt(this.random, 20, 60);
 -        this.moveControl = new FlyingMoveControl(this, 20, true);
-+        // Paper start - apply gravity to bees when they get stuck in the void, fixes MC-167279
++        // Paper start - Fix MC-167279
 +        class BeeFlyingMoveControl extends FlyingMoveControl {
 +            public BeeFlyingMoveControl(final Mob entity, final int maxPitchChange, final boolean noGravity) {
 +                super(entity, maxPitchChange, noGravity);
@@ -28,7 +28,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            }
 +        }
 +        this.moveControl = new BeeFlyingMoveControl(this, 20, true);
-+        // Paper end
++        // Paper end - Fix MC-167279
          this.lookControl = new Bee.BeeLookControl(this);
          this.setPathfindingMalus(BlockPathTypes.DANGER_FIRE, -1.0F);
          this.setPathfindingMalus(BlockPathTypes.WATER, -1.0F);

patches/server/Configurable-Keep-Spawn-Loaded-range-per-world.patch

@@ -13,43 +13,42 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      // CraftBukkit start
      public void prepareLevels(ChunkProgressListener worldloadlistener, ServerLevel worldserver) {
-+        ServerChunkCache chunkproviderserver = worldserver.getChunkSource(); // Paper
++        ServerChunkCache chunkproviderserver = worldserver.getChunkSource(); // Paper - Configurable Keep Spawn Loaded range per world
          // WorldServer worldserver = this.overworld();
          this.forceTicks = true;
          // CraftBukkit end
-+        if (worldserver.getWorld().getKeepSpawnInMemory()) { // Paper
++        if (worldserver.getWorld().getKeepSpawnInMemory()) { // Paper - Configurable Keep Spawn Loaded range per world
  
          MinecraftServer.LOGGER.info("Preparing start region for dimension {}", worldserver.dimension().location());
          BlockPos blockposition = worldserver.getSharedSpawnPos();
  
          worldloadlistener.updateSpawnPos(new ChunkPos(blockposition));
 -        ServerChunkCache chunkproviderserver = worldserver.getChunkSource();
-+        //ChunkProviderServer chunkproviderserver = worldserver.getChunkProvider(); // Paper - move up
++        //ChunkProviderServer chunkproviderserver = worldserver.getChunkProvider(); // Paper - Configurable Keep Spawn Loaded range per world; move up
  
          this.nextTickTimeNanos = Util.getNanos();
 -        // CraftBukkit start
 -        if (worldserver.getWorld().getKeepSpawnInMemory()) {
 -            chunkproviderserver.addRegionTicket(TicketType.START, new ChunkPos(blockposition), 11, Unit.INSTANCE);
--
++        // Paper start - Configurable Keep Spawn Loaded range per world
--            while (chunkproviderserver.getTickingGenerated() != 441) {
--                // this.nextTickTimeNanos = SystemUtils.getNanos() + MinecraftServer.PREPARE_LEVELS_DEFAULT_DELAY_NANOS;
--                this.executeModerately();
--            }
--        }
-+        // Paper start - configurable spawn reason
 +        int radiusBlocks = worldserver.paperConfig().spawn.keepSpawnLoadedRange * 16;
 +        int radiusChunks = radiusBlocks / 16 + ((radiusBlocks & 15) != 0 ? 1 : 0);
 +        int totalChunks = ((radiusChunks) * 2 + 1);
 +        totalChunks *= totalChunks;
 +        worldloadlistener.setChunkRadius(radiusBlocks / 16);
-+
+ 
+-            while (chunkproviderserver.getTickingGenerated() != 441) {
+-                // this.nextTickTimeNanos = SystemUtils.getNanos() + MinecraftServer.PREPARE_LEVELS_DEFAULT_DELAY_NANOS;
+-                this.executeModerately();
+-            }
+-        }
 +        worldserver.addTicketsForSpawn(radiusBlocks, blockposition);
-+        // Paper end
++        // Paper end - Configurable Keep Spawn Loaded range per world
  
          // this.nextTickTimeNanos = SystemUtils.getNanos() + MinecraftServer.PREPARE_LEVELS_DEFAULT_DELAY_NANOS;
          this.executeModerately();
          // Iterator iterator = this.levels.values().iterator();
-+        }
++        } // Paper - Configurable Keep Spawn Loaded range per world
  
          if (true) {
              ServerLevel worldserver1 = worldserver;
@@ -58,7 +57,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          this.executeModerately();
          // CraftBukkit end
 -        worldloadlistener.stop();
-+        if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper
++        if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper - Configurable Keep Spawn Loaded range per world
          // CraftBukkit start
          // this.updateMobSpawningFlags();
          worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
@@ -70,7 +69,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          return ((MapIndex) this.getServer().overworld().getDataStorage().computeIfAbsent(MapIndex.factory(), "idcounts")).getFreeAuxValueForMap();
      }
  
-+    // Paper start - helper function for configurable spawn radius
++    // Paper start - Configurable Keep Spawn Loaded range per world
 +    public void addTicketsForSpawn(int radiusInBlocks, BlockPos spawn) {
 +        // In order to respect vanilla behavior, which is ensuring everything but the spawn border can tick, we add tickets
 +        // with level 31 for the non-border spawn chunks
@@ -135,11 +134,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            chunkproviderserver.removeRegionTicket(TicketType.START, new ChunkPos(spawn.offset(-radiusInBlocks, 0, z)), 1, Unit.INSTANCE); // level 32
 +        }
 +    }
-+    // Paper end
++    // Paper end - Configurable Keep Spawn Loaded range per world
 +
      public void setDefaultSpawnPos(BlockPos pos, float angle) {
 -        ChunkPos chunkcoordintpair = new ChunkPos(new BlockPos(this.levelData.getXSpawn(), 0, this.levelData.getZSpawn()));
-+        // Paper - configurable spawn radius
++        // Paper start - Configurable Keep Spawn Loaded range per world
 +        BlockPos prevSpawn = this.getSharedSpawnPos();
 +        //ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(new BlockPosition(this.worldData.a(), 0, this.worldData.c()));
  
@@ -163,7 +162,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      void stop();
 +
-+    void setChunkRadius(int radius); // Paper - allow changing chunk radius
++    void setChunkRadius(int radius); // Paper - Configurable Keep Spawn Loaded range per world
  }
 diff --git a/src/main/java/net/minecraft/server/level/progress/LoggerChunkProgressListener.java b/src/main/java/net/minecraft/server/level/progress/LoggerChunkProgressListener.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
@@ -180,13 +179,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      private long nextTickTime = Long.MAX_VALUE;
  
      public LoggerChunkProgressListener(int radius) {
-+        // Paper start - Allow changing radius later for configurable spawn patch
++        // Paper start - Configurable Keep Spawn Loaded range per world
 +        this.setChunkRadius(radius); // Move to method
 +    }
 +
 +    @Override
 +    public void setChunkRadius(int radius) {
-+        // Paper end
++        // Paper end - Configurable Keep Spawn Loaded range per world
          int i = radius * 2 + 1;
          this.maxCount = i * i;
      }

patches/server/Configurable-Region-Compression-Format.patch

@@ -9,7 +9,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
 +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFile.java
 @@ -0,0 +0,0 @@ public class RegionFile implements AutoCloseable {
-     // Paper end
+     // Paper end - Cache chunk status
  
      public RegionFile(Path file, Path directory, boolean dsync) throws IOException {
 -        this(file, directory, RegionFileVersion.VERSION_DEFLATE, dsync);

patches/server/Configurable-chance-of-villager-zombie-infection.patch

@@ -21,8 +21,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -            if (world.getDifficulty() != Difficulty.HARD && this.random.nextBoolean()) {
 -                return flag;
 -            }
-+        final double fallbackChance = world.getDifficulty() == Difficulty.HARD ? 100d : world.getDifficulty() == Difficulty.NORMAL ? 50d : 0d; // Paper
++        final double fallbackChance = world.getDifficulty() == Difficulty.HARD ? 100d : world.getDifficulty() == Difficulty.NORMAL ? 50d : 0d; // Paper - Configurable chance of villager zombie infection
-+        if (this.random.nextDouble() * 100 < world.paperConfig().entities.behavior.zombieVillagerInfectionChance.or(fallbackChance) && other instanceof Villager entityvillager) { // Paper
++        if (this.random.nextDouble() * 100 < world.paperConfig().entities.behavior.zombieVillagerInfectionChance.or(fallbackChance) && other instanceof Villager entityvillager) { // Paper - Configurable chance of villager zombie infection
              // CraftBukkit start
              flag = Zombie.zombifyVillager(world, entityvillager, this.blockPosition(), this.isSilent(), CreatureSpawnEvent.SpawnReason.INFECTION) == null;
          }

patches/server/Do-not-let-the-server-load-chunks-from-newer-version.patch

@@ -31,5 +31,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            }
 +        }
          // Paper end
-         ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
+         ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - guard against serializing mismatching coordinates; diff on change, see ChunkSerializer#getChunkCoordinate
  

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

@@ -21,12 +21,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              } else {
                  BlockPos blockPos = pos.relative(directionMapper.apply(state));
 -                BlockState blockState = world.getBlockState(blockPos);
-+                // Paper start
++                // Paper start - Don't load Chunks from Hoppers and other things
 +                BlockState blockState = world.getBlockStateIfLoaded(blockPos);
 +                if (blockState == null) {
 +                    return new DoubleBlockCombiner.NeighborCombineResult.Single<>(blockEntity);
 +                }
-+                // Paper end
++                // Paper end - Don't load Chunks from Hoppers and other things
                  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/Dont-send-unnecessary-sign-update.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              this.level.sendBlockUpdated(this.getBlockPos(), this.getBlockState(), this.getBlockState(), 3);
          } else {
              SignBlockEntity.LOGGER.warn("Player {} just tried to change non-editable sign", player.getName().getString());
-+            if (player.distanceToSqr(this.getBlockPos().getX(), this.getBlockPos().getY(), this.getBlockPos().getZ()) < 32 * 32) // Paper
++            if (player.distanceToSqr(this.getBlockPos().getX(), this.getBlockPos().getY(), this.getBlockPos().getZ()) < 32 * 32) // Paper - Dont send far away sign update
              ((ServerPlayer) player).connection.send(this.getUpdatePacket()); // CraftBukkit
          }
      }

patches/server/Duplicate-UUID-Resolve-Option.patch

@@ -63,7 +63,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                      entity.discard();
                      needsRemoval = true;
                  }
-+                checkDupeUUID(world, entity); // Paper
++                checkDupeUUID(world, entity); // Paper - duplicate uuid resolving
                  return !needsRemoval;
              }), position); // Paper - rewrite chunk system
              // CraftBukkit end
@@ -71,7 +71,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          throw new UnsupportedOperationException(); // Paper - rewrite chunk system
      }
  
-+    // Paper start
++    // Paper start - duplicate uuid resolving
 +    // rets true if to prevent the entity from being added
 +    public static boolean checkDupeUUID(ServerLevel level, Entity entity) {
 +        io.papermc.paper.configuration.WorldConfiguration.Entities.Spawning.DuplicateUUID.DuplicateUUIDMode mode = level.paperConfig().entities.spawning.duplicateUuid.mode;
@@ -113,7 +113,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        }
 +        return false;
 +    }
-+    // Paper end
++    // Paper end - duplicate uuid resolving
      public CompletableFuture<Either<LevelChunk, ChunkHolder.ChunkLoadingFailure>> prepareTickingChunk(ChunkHolder holder) {
          throw new UnsupportedOperationException(); // Paper - rewrite chunk system
      }

patches/server/Entity-Jump-API.patch

@@ -12,10 +12,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              } else if (this.isInLava() && (!this.onGround() || d3 > d4)) {
                  this.jumpInLiquid(FluidTags.LAVA);
              } else if ((this.onGround() || flag && d3 <= d4) && this.noJumpDelay == 0) {
-+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
++                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper - Entity Jump API
                  this.jumpFromGround();
                  this.noJumpDelay = 10;
-+                } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
++                } else { this.setJumping(false); } // Paper - Entity Jump API; setJumping(false) stops a potential loop
              }
          } else {
              this.noJumpDelay = 0;
@@ -27,9 +27,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              Panda entitypanda = (Panda) iterator.next();
  
              if (!entitypanda.isBaby() && entitypanda.onGround() && !entitypanda.isInWater() && entitypanda.canPerformAction()) {
-+                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
++                if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper - Entity Jump API
                  entitypanda.jumpFromGround();
-+                } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
++                } else { this.setJumping(false); } // Paper - Entity Jump API; setJumping(false) stops a potential loop
              }
          }
  
@@ -41,9 +41,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  }
  
                  if (!flag && this.onGround()) {
-+                    if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper
++                    if (new com.destroystokyo.paper.event.entity.EntityJumpEvent(getBukkitLivingEntity()).callEvent()) { // Paper - Entity Jump API
                      this.jumpFromGround();
-+                    } else { this.setJumping(false); } // Paper - setJumping(false) stops a potential loop
++                    } else { this.setJumping(false); } // Paper - Entity Jump API; setJumping(false) stops a potential loop
                  }
              }
  

patches/server/Fix-Per-World-Difficulty-Remembering-Difficulty.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/server/MinecraftServer.java
 +++ b/src/main/java/net/minecraft/server/MinecraftServer.java
 @@ -0,0 +0,0 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
-         if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper
+         if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper - Configurable Keep Spawn Loaded range per world
          // CraftBukkit start
          // this.updateMobSpawningFlags();
 -        worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());

patches/server/Fix-SpawnChangeEvent-not-firing-for-all-use-cases.patch

@@ -10,7 +10,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
 @@ -0,0 +0,0 @@ public class ServerLevel extends Level implements WorldGenLevel {
      public void setDefaultSpawnPos(BlockPos pos, float angle) {
-         // Paper - configurable spawn radius
+         // Paper start - Configurable Keep Spawn Loaded range per world
          BlockPos prevSpawn = this.getSharedSpawnPos();
 +        Location prevSpawnLoc = this.getWorld().getSpawnLocation(); // Paper - Call SpawnChangeEvent
          //ChunkCoordIntPair chunkcoordintpair = new ChunkCoordIntPair(new BlockPosition(this.worldData.a(), 0, this.worldData.c()));

patches/server/Fix-World-isChunkGenerated-calls.patch

@@ -87,7 +87,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        ChunkHolder chunkHolder = io.papermc.paper.chunk.system.ChunkSystem.getUnloadingChunkHolder(this.level, chunkX, chunkZ);
 +        return chunkHolder == null ? null : chunkHolder.getAvailableChunkNow();
 +    }
-+    // Paper end
++    // Paper end - Cache chunk status on disk
 +
      boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) {
          // Spigot start
@@ -122,7 +122,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        final int location = getChunkLocation(x, z);
 +        return this.statuses[location];
 +    }
-+    // Paper end
++    // Paper end - Cache chunk status
 +
      public RegionFile(Path file, Path directory, boolean dsync) throws IOException {
          this(file, directory, RegionFileVersion.VERSION_DEFLATE, dsync);
@@ -131,7 +131,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          return this.getOffset(pos) != 0;
      }
  
-+    private static int getChunkLocation(int x, int z) { return (x & 31) + (z & 31) * 32; } // Paper - OBFHELPER - sort of, mirror of logic below
++    private static int getChunkLocation(int x, int z) { return (x & 31) + (z & 31) * 32; } // Paper - Cache chunk status; OBFHELPER - sort of, mirror of logic below
      private static int getOffsetIndex(ChunkPos pos) {
          return pos.getRegionLocalX() + pos.getRegionLocalZ() * 32;
      }
@@ -139,7 +139,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          synchronized (this) {
          try {
          // Paper end
-+        this.closed = true; // Paper
++        this.closed = true; // Paper - Cache chunk status
          try {
              this.padToFullSector();
          } finally {
@@ -151,7 +151,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
              try {
                  NbtIo.write(nbt, (DataOutput) dataoutputstream);
-+                regionfile.setStatus(pos.x, pos.z, ChunkSerializer.getStatus(nbt)); // Paper - cache status on disk
++                regionfile.setStatus(pos.x, pos.z, ChunkSerializer.getStatus(nbt)); // Paper - Cache chunk status
                  regionfile.setOversized(pos.x, pos.z, false); // Paper - We don't do this anymore, mojang stores differently, but clear old meta flag if it exists to get rid of our own meta file once last oversized is gone
              } catch (Throwable throwable) {
                  if (dataoutputstream != null) {
@@ -180,8 +180,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -            return this.isChunkLoaded(x, z) || this.world.getChunkSource().chunkMap.read(new ChunkPos(x, z)).get().isPresent();
 -        } catch (InterruptedException | ExecutionException ex) {
 +            return world.getChunkSource().chunkMap.getChunkStatusOnDisk(new ChunkPos(x, z)) == ChunkStatus.FULL;
-+            // Paper end
 +        } catch (java.io.IOException ex) {
++            // Paper end - Fix this method
              throw new RuntimeException(ex);
          }
      }
@@ -240,7 +240,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        world.getChunkSource().addRegionTicket(TicketType.PLUGIN, chunkPos, 1, Unit.INSTANCE);
 +        world.getChunkSource().getChunk(x, z, ChunkStatus.FULL, true);
 +        return true;
-+        // Paper end
++        // Paper end - Optimize this method
      }
  
      @Override

patches/server/Fix-a-bunch-of-vanilla-bugs.patch

@@ -118,7 +118,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
      }
-     // Paper end
+     // Paper end - Cache chunk status on disk
  
 -    boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) {
 +    public boolean anyPlayerCloseEnoughForSpawning(ChunkPos pos) { // Paper - public

patches/server/Fix-items-vanishing-through-end-portal.patch

@@ -20,9 +20,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              if (flag1) {
                  blockposition1 = ServerLevel.END_SPAWN_POINT;
              } else {
-+                // Paper start - Ensure spawn chunk is always loaded before calculating Y coordinate
++                destination.getChunkAt(destination.getSharedSpawnPos()); // Paper - Ensure spawn chunk is always loaded before calculating Y coordinate
-+                destination.getChunkAt(destination.getSharedSpawnPos());
-+                // Paper end
                  blockposition1 = destination.getHeightmapPos(Heightmap.Types.MOTION_BLOCKING_NO_LEAVES, destination.getSharedSpawnPos());
              }
              // CraftBukkit start

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

@@ -2,7 +2,6 @@ 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

patches/server/Fix-tripwire-state-inconsistency.patch

@@ -82,6 +82,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              TripWireHookBlock.emitState(world, pos, flag4, flag5, flag2, flag3);
 -            if (!flag) {
 +            if (!beingRemoved) { // Paper - fix tripwire state inconsistency
-                 if (world.getBlockState(pos).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - validate
+                 if (world.getBlockState(pos).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - Validate tripwire hook placement before update
                  world.setBlock(pos, (BlockState) iblockdata3.setValue(TripWireHookBlock.FACING, enumdirection), 3);
                  if (flag1) {

patches/server/Flat-bedrock-generator-settings.patch

@@ -108,7 +108,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                      CauldronInteraction.bootStrap();
                      // Paper start
                      BuiltInRegistries.bootStrap(() -> {
-+                        io.papermc.paper.world.worldgen.OptionallyFlatBedrockConditionSource.bootstrap(); // Paper - optional flat bedrock
++                        io.papermc.paper.world.worldgen.OptionallyFlatBedrockConditionSource.bootstrap(); // Paper - Flat bedrock generator settings
                          io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enterBootstrappers(); // Paper - Entrypoint for bootstrapping
                      });
                      // Paper end
@@ -121,7 +121,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public void buildSurface(WorldGenRegion region, StructureManager structures, RandomState noiseConfig, ChunkAccess chunk) {
          if (!SharedConstants.debugVoidTerrain(chunk.getPos())) {
 -            WorldGenerationContext worldgenerationcontext = new WorldGenerationContext(this, region);
-+            WorldGenerationContext worldgenerationcontext = new WorldGenerationContext(this, region, region.getMinecraftWorld()); // Paper
++            WorldGenerationContext worldgenerationcontext = new WorldGenerationContext(this, region, region.getMinecraftWorld()); // Paper - Flat bedrock generator settings
  
              this.buildSurface(chunk, worldgenerationcontext, noiseConfig, structures, region.getBiomeManager(), region.registryAccess().registryOrThrow(Registries.BIOME), Blender.of(region));
          }
@@ -130,7 +130,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          });
          Aquifer aquifer = noisechunk.aquifer();
 -        CarvingContext carvingcontext = new CarvingContext(this, chunkRegion.registryAccess(), chunk.getHeightAccessorForGeneration(), noisechunk, noiseConfig, ((NoiseGeneratorSettings) this.settings.value()).surfaceRule());
-+        CarvingContext carvingcontext = new CarvingContext(this, chunkRegion.registryAccess(), chunk.getHeightAccessorForGeneration(), noisechunk, noiseConfig, ((NoiseGeneratorSettings) this.settings.value()).surfaceRule(), chunkRegion.getMinecraftWorld()); // Paper
++        CarvingContext carvingcontext = new CarvingContext(this, chunkRegion.registryAccess(), chunk.getHeightAccessorForGeneration(), noisechunk, noiseConfig, ((NoiseGeneratorSettings) this.settings.value()).surfaceRule(), chunkRegion.getMinecraftWorld()); // Paper - Flat bedrock generator settings
          CarvingMask carvingmask = ((ProtoChunk) chunk).getOrCreateCarvingMask(carverStep);
  
          for (int j = -8; j <= 8; ++j) {
@@ -142,14 +142,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  public class WorldGenerationContext {
      private final int minY;
      private final int height;
-+    private final @javax.annotation.Nullable net.minecraft.world.level.Level level; // Paper
++    private final @javax.annotation.Nullable net.minecraft.world.level.Level level; // Paper - Flat bedrock generator settings
  
 -    public WorldGenerationContext(ChunkGenerator generator, LevelHeightAccessor world) {
-+    public WorldGenerationContext(ChunkGenerator generator, LevelHeightAccessor world) { this(generator, world, null); } // Paper
++    public WorldGenerationContext(ChunkGenerator generator, LevelHeightAccessor world) { this(generator, world, null); } // Paper - Flat bedrock generator settings
-+    public WorldGenerationContext(ChunkGenerator generator, LevelHeightAccessor world, @org.jetbrains.annotations.Nullable net.minecraft.world.level.Level level) { // Paper
++    public WorldGenerationContext(ChunkGenerator generator, LevelHeightAccessor world, @org.jetbrains.annotations.Nullable net.minecraft.world.level.Level level) { // Paper - Flat bedrock generator settings
          this.minY = Math.max(world.getMinBuildHeight(), generator.getMinY());
          this.height = Math.min(world.getHeight(), generator.getGenDepth());
-+        this.level = level; // Paper
++        this.level = level; // Paper - Flat bedrock generator settings
      }
  
      public int getMinGenY() {
@@ -158,14 +158,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          return this.height;
      }
 +
-+    // Paper start
++    // Paper start - Flat bedrock generator settings
 +    public net.minecraft.world.level.Level getWorld() {
 +        if (this.level == null) {
 +            throw new NullPointerException("WorldGenerationContext was initialized without a Level, but WorldGenerationContext#getWorld was called");
 +        }
 +        return this.level;
 +    }
-+    // Paper end
++    // Paper end - Flat bedrock generator settings
  }
 diff --git a/src/main/java/net/minecraft/world/level/levelgen/carver/CarvingContext.java b/src/main/java/net/minecraft/world/level/levelgen/carver/CarvingContext.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
@@ -177,8 +177,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
 -    public CarvingContext(NoiseBasedChunkGenerator noiseChunkGenerator, RegistryAccess registryManager, LevelHeightAccessor heightLimitView, NoiseChunk chunkNoiseSampler, RandomState noiseConfig, SurfaceRules.RuleSource materialRule) {
 -        super(noiseChunkGenerator, heightLimitView);
-+    public CarvingContext(NoiseBasedChunkGenerator noiseChunkGenerator, RegistryAccess registryManager, LevelHeightAccessor heightLimitView, NoiseChunk chunkNoiseSampler, RandomState noiseConfig, SurfaceRules.RuleSource materialRule, @javax.annotation.Nullable net.minecraft.world.level.Level level) { // Paper
++    public CarvingContext(NoiseBasedChunkGenerator noiseChunkGenerator, RegistryAccess registryManager, LevelHeightAccessor heightLimitView, NoiseChunk chunkNoiseSampler, RandomState noiseConfig, SurfaceRules.RuleSource materialRule, @javax.annotation.Nullable net.minecraft.world.level.Level level) { // Paper - Flat bedrock generator settings
-+        super(noiseChunkGenerator, heightLimitView, level); // Paper
++        super(noiseChunkGenerator, heightLimitView, level); // Paper - Flat bedrock generator settings
          this.registryAccess = registryManager;
          this.noiseChunk = chunkNoiseSampler;
          this.randomState = noiseConfig;
@@ -191,7 +191,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      public PlacementContext(WorldGenLevel world, ChunkGenerator generator, Optional<PlacedFeature> placedFeature) {
 -        super(generator, world);
-+        super(generator, world, world.getLevel()); // Paper
++        super(generator, world, world.getLevel()); // Paper - Flat bedrock generator settings
          this.level = world;
          this.generator = generator;
          this.topFeature = placedFeature;

patches/server/Friction-API.patch

@@ -61,7 +61,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public class ItemEntity extends Entity implements TraceableEntity {
      private int lastTick = MinecraftServer.currentTick - 1; // CraftBukkit
      public boolean canMobPickup = true; // Paper
-     private int despawnRate = -1; // Paper
+     private int despawnRate = -1; // Paper - Alternative item-despawn-rate
 +    public net.kyori.adventure.util.TriState frictionState = net.kyori.adventure.util.TriState.NOT_SET; // Paper - Friction API
  
      public ItemEntity(EntityType<? extends ItemEntity> type, Level world) {

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

@@ -24,7 +24,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            return new ChunkPos(chunkData.getInt("xPos"), chunkData.getInt("zPos"));
 +        }
 +    }
-+    // Paper end
++    // Paper end - guard against serializing mismatching coordinates
      // Paper start
      public static final class InProgressChunkHolder {
  
@@ -33,7 +33,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public static InProgressChunkHolder loadChunk(ServerLevel world, PoiManager poiStorage, ChunkPos chunkPos, CompoundTag nbt, boolean distinguish) {
          // 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
++        ChunkPos chunkcoordintpair1 = new ChunkPos(nbt.getInt("xPos"), nbt.getInt("zPos")); // Paper - guard against serializing mismatching coordinates; 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 {})", new Object[]{chunkPos, chunkPos, chunkcoordintpair1});
@@ -45,13 +45,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      // Paper start - async chunk io
      public void write(ChunkPos chunkPos, CompoundTag nbt) throws IOException {
-+        // Paper start
++        // Paper start - guard against serializing mismatching coordinates
 +        if (nbt != null && !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
++        // Paper end - guard against serializing mismatching coordinates
          this.regionFileCache.write(chunkPos, nbt);
          // Paper end - Async chunk loading
          if (this.legacyStructureHandler != null) {

patches/server/Improve-Block-breakNaturally-API.patch

@@ -25,11 +25,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      @Override
      public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
          super.playerDestroy(world, player, pos, state, blockEntity, tool);
-+        // Paper start
++        // Paper start - Improve Block#breakNaturally API
 +        this.afterDestroy(world, pos, tool);
 +    }
 +    public void afterDestroy(Level world, BlockPos pos, ItemStack tool) {
-+        // Paper end
++        // Paper end - Improve Block#breakNaturally API
          if (EnchantmentHelper.getItemEnchantmentLevel(Enchantments.SILK_TOUCH, tool) == 0) {
              if (world.dimensionType().ultraWarm()) {
                  world.removeBlock(pos, false);

patches/server/Improve-cancelling-PreCreatureSpawnEvent-with-per-pl.patch

@@ -35,7 +35,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -        return entityPlayer.mobCounts[mobCategory.ordinal()];
 +        return entityPlayer.mobCounts[mobCategory.ordinal()] + entityPlayer.mobBackoffCounts[mobCategory.ordinal()]; // Paper - per player mob count backoff
      }
-     // Paper end
+     // Paper end - Optional per player mob spawns
  
 diff --git a/src/main/java/net/minecraft/server/level/ServerChunkCache.java b/src/main/java/net/minecraft/server/level/ServerChunkCache.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
@@ -67,7 +67,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public class ServerPlayer extends Player {
      public static final int MOBCATEGORY_TOTAL_ENUMS = net.minecraft.world.entity.MobCategory.values().length;
      public final int[] mobCounts = new int[MOBCATEGORY_TOTAL_ENUMS]; // Paper
-     // Paper end - mob spawning rework
+     // Paper end - Optional per player mob spawns
 +    public final int[] mobBackoffCounts = new int[MOBCATEGORY_TOTAL_ENUMS]; // Paper - per player mob count backoff
  
      // CraftBukkit start
@@ -86,5 +86,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                                    }
 +                                    // Paper end - per player mob count backoff
                                      if (doSpawning == PreSpawnStatus.ABORT) {
-                                         return j; // Paper
+                                         return j; // Paper - Optional per player mob spawns
                                      }

patches/server/Improve-java-version-check.patch

@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  return;
              }
  
-+            // Paper start - better java version checks
++            // Paper start - Improve java version check
 +            boolean skip = Boolean.getBoolean("Paper.IgnoreJavaVersion");
              float javaVersion = Float.parseFloat(System.getProperty("java.class.version"));
 -            if (javaVersion < 61.0) {
@@ -40,7 +40,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +            if (skip && (isOldVersion || isPreRelease)) {
 +                System.err.println("Unsupported Java detected ("+ javaVersionName + "), but the check was skipped. Proceed with caution! ");
 +            }
-+            // Paper end - better java version checks
++            // Paper end - Improve java version check
 +
              try {
                  // Paper start - Handled by TerminalConsoleAppender

patches/server/Lag-compensation-ticks.patch

@@ -36,7 +36,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@ public class ServerLevel extends Level implements WorldGenLevel {
          return player != null && player.level() == this ? player : null;
      }
-     // Paper end
+     // Paper end - optimise getPlayerByUUID
 +    // Paper start - lag compensation
 +    private long lagCompensationTick = net.minecraft.server.MinecraftServer.SERVER_INIT;
 +
@@ -95,7 +95,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
 @@ -0,0 +0,0 @@ public abstract class LivingEntity extends Entity implements Attackable {
  
-         if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper use override flag
+         if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper - Prevent consuming the wrong itemstack
              this.useItem = itemstack;
 -            this.useItemRemaining = itemstack.getUseDuration();
 +            // Paper start - lag compensate eating

patches/server/MC-145656-Fix-Follow-Range-Initial-Target.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          this.randomInterval = reducedTickDelay(reciprocalChance);
          this.setFlags(EnumSet.of(Goal.Flag.TARGET));
          this.targetConditions = TargetingConditions.forCombat().range(this.getFollowDistance()).selector(targetPredicate);
-+        if (mob.level().paperConfig().entities.entitiesTargetWithFollowRange) this.targetConditions.useFollowRange(); // Paper
++        if (mob.level().paperConfig().entities.entitiesTargetWithFollowRange) this.targetConditions.useFollowRange(); // Paper - Fix MC-145656
      }
  
      @Override
@@ -25,7 +25,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  if (this.range > 0.0D) {
                      double d = this.testInvisible ? targetEntity.getVisibilityPercent(baseEntity) : 1.0D;
 -                    double e = Math.max(this.range * d, 2.0D);
-+                    double e = Math.max((this.useFollowRange ? this.getFollowRange(baseEntity) : this.range) * d, 2.0D); // Paper
++                    double e = Math.max((this.useFollowRange ? this.getFollowRange(baseEntity) : this.range) * d, 2.0D); // Paper - Fix MC-145656
                      double f = baseEntity.distanceToSqr(targetEntity.getX(), targetEntity.getY(), targetEntity.getZ());
                      if (f > e * e) {
                          return false;
@@ -34,7 +34,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          }
      }
 +
-+    // Paper start
++    // Paper start - Fix MC-145656
 +    private boolean useFollowRange = false;
 +
 +    public TargetingConditions useFollowRange() {
@@ -46,5 +46,5 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        net.minecraft.world.entity.ai.attributes.AttributeInstance attributeinstance = entityliving.getAttribute(net.minecraft.world.entity.ai.attributes.Attributes.FOLLOW_RANGE);
 +        return attributeinstance == null ? 16.0D : attributeinstance.getValue();
 +    }
-+    // Paper end
++    // Paper end - Fix MC-145656
  }

patches/server/Make-the-GUI-graph-fancier.patch

@@ -392,7 +392,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      private JComponent buildInfoPanel() {
          JPanel jpanel = new JPanel(new BorderLayout());
 -        StatsComponent guistatscomponent = new StatsComponent(this.server);
-+        com.destroystokyo.paper.gui.GuiStatsComponent guistatscomponent = new com.destroystokyo.paper.gui.GuiStatsComponent(this.server); // Paper
++        com.destroystokyo.paper.gui.GuiStatsComponent guistatscomponent = new com.destroystokyo.paper.gui.GuiStatsComponent(this.server); // Paper - Make GUI graph fancier
          Collection<Runnable> collection = this.finalizers; // CraftBukkit - decompile error
  
          Objects.requireNonNull(guistatscomponent);

patches/server/Mob-Spawner-API-Enhancements.patch

@@ -64,7 +64,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +        nbt.putShort("MinSpawnDelay", (short) Math.min(Short.MAX_VALUE, this.minSpawnDelay));
 +        nbt.putShort("MaxSpawnDelay", (short) Math.min(Short.MAX_VALUE, this.maxSpawnDelay));
-+        // Paper nbt
++        // Paper end
          nbt.putShort("SpawnCount", (short) this.spawnCount);
          nbt.putShort("MaxNearbyEntities", (short) this.maxNearbyEntities);
          nbt.putShort("RequiredPlayerRange", (short) this.requiredPlayerRange);

patches/server/Only-count-Natural-Spawned-mobs-towards-natural-spaw.patch

@@ -30,7 +30,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                        entity.spawnReason == org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.CHUNK_GEN)) {
 +                    continue;
 +                }
-+                // Paper end
++                // Paper end - Only count natural spawns
                  BlockPos blockposition = entity.blockPosition();
  
                  chunkSource.query(ChunkPos.asLong(blockposition), (chunk) -> {

patches/server/Only-write-chunk-data-to-disk-if-it-serializes-witho.patch

@@ -52,10 +52,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +++ b/src/main/java/net/minecraft/world/level/chunk/storage/RegionFileStorage.java
 @@ -0,0 +0,0 @@ public class RegionFileStorage implements AutoCloseable {
                  NbtIo.write(nbt, (DataOutput) dataoutputstream);
-                 regionfile.setStatus(pos.x, pos.z, ChunkSerializer.getStatus(nbt)); // Paper - cache status on disk
+                 regionfile.setStatus(pos.x, pos.z, ChunkSerializer.getStatus(nbt)); // Paper - Cache chunk status
                  regionfile.setOversized(pos.x, pos.z, false); // Paper - We don't do this anymore, mojang stores differently, but clear old meta flag if it exists to get rid of our own meta file once last oversized is gone
 +                dataoutputstream.close(); // Paper - only write if successful
-+            // Paper start - don't write garbage data to disk if writing serialization fails
++                // Paper start - don't write garbage data to disk if writing serialization fails
 +            } catch (RegionFileSizeException e) {
 +                attempts = 5; // Don't retry
 +                regionfile.clear(pos);

patches/server/Optimise-Chunk-getFluid.patch

@@ -20,8 +20,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -
 -            if (l >= 0 && l < this.sections.length) {
 -                LevelChunkSection chunksection = this.sections[l];
-+        // try {  // Paper - remove try catch
++        // Paper start - Perf: Optimise Chunk#getFluid
-+        // Paper start - reduce the number of ops in this call
++        // try {  // Remove try catch
 +        int index = this.getSectionIndex(y);
 +            if (index >= 0 && index < this.sections.length) {
 +                LevelChunkSection chunksection = this.sections[index];
@@ -29,12 +29,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  if (!chunksection.hasOnlyAir()) {
 -                    return chunksection.getFluidState(x & 15, y & 15, z & 15);
 +                    return chunksection.states.get((y & 15) << 8 | (z & 15) << 4 | x & 15).getFluidState();
-+                    // Paper end
++                    // Paper end - Perf: Optimise Chunk#getFluid
                  }
              }
  
              return Fluids.EMPTY.defaultFluidState();
-+        /* // Paper - remove try catch
++        /* // Paper - Perf: Optimise Chunk#getFluid
          } catch (Throwable throwable) {
              CrashReport crashreport = CrashReport.forThrowable(throwable, "Getting fluid state");
              CrashReportCategory crashreportsystemdetails = crashreport.addCategory("Block being got");
@@ -42,7 +42,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              });
              throw new ReportedException(crashreport);
          }
-+         */  // Paper - remove try catch
++         */  // Paper - Perf: Optimise Chunk#getFluid
      }
  
      // CraftBukkit start
@@ -55,7 +55,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      public FluidState getFluidState(int x, int y, int z) {
 -        return ((BlockState) this.states.get(x, y, z)).getFluidState();
-+        return this.states.get(x, y, z).getFluidState(); // Paper - diff on change - we expect this to be effectively just getType(x, y, z).getFluid(). If this changes we need to check other patches that use IBlockData#getFluid.
++        return this.states.get(x, y, z).getFluidState(); // Paper - Perf: Optimise Chunk#getFluid; diff on change - we expect this to be effectively just getType(x, y, z).getFluid(). If this changes we need to check other patches that use IBlockData#getFluid.
      }
  
      public void acquire() {

patches/server/Optimise-EntityGetter-getPlayerByUUID.patch

@@ -20,7 +20,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        final Player player = this.getServer().getPlayerList().getPlayer(uuid);
 +        return player != null && player.level() == this ? player : null;
 +    }
-+    // Paper end
++    // Paper end - optimise getPlayerByUUID
 +
      // Add env and gen to constructor, IWorldDataServer -> WorldDataServer
      public ServerLevel(MinecraftServer minecraftserver, Executor executor, LevelStorageSource.LevelStorageAccess convertable_conversionsession, PrimaryLevelData iworlddataserver, ResourceKey<Level> resourcekey, LevelStem worlddimension, ChunkProgressListener worldloadlistener, boolean flag, long i, List<CustomSpawner> list, boolean flag1, @Nullable RandomSequences randomsequences, org.bukkit.World.Environment env, org.bukkit.generator.ChunkGenerator gen, org.bukkit.generator.BiomeProvider biomeProvider) {

patches/server/Optimise-chunk-tick-iteration.patch

@@ -132,7 +132,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          super(session.getDimensionPath(world.dimension()).resolve("region"), dataFixer, dsync);
 @@ -0,0 +0,0 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
      }
-     // Paper end
+     // Paper end - Optional per player mob spawns
  
 -    private static double euclideanDistanceSquared(ChunkPos pos, Entity entity) {
 +    public static double euclideanDistanceSquared(ChunkPos pos, Entity entity) { // Paper - optimise chunk iteration; public

patches/server/Optimise-getChunkAt-calls-for-loaded-chunks.patch

@@ -14,12 +14,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  return this.getChunk(x, z, leastStatus, create);
              }, this.mainThreadProcessor).join();
          } else {
-+            // Paper start - optimise for loaded chunks
++            // Paper start - Perf: Optimise getChunkAt calls for loaded chunks
 +            LevelChunk ifLoaded = this.getChunkAtIfLoadedMainThread(x, z);
 +            if (ifLoaded != null) {
 +                return ifLoaded;
 +            }
-+            // Paper end
++            // Paper end - Perf: Optimise getChunkAt calls for loaded chunks
              ProfilerFiller gameprofilerfiller = this.level.getProfiler();
  
              gameprofilerfiller.incrementCounter("getChunk");
@@ -60,7 +60,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -                    return null;
 -                }
 -            }
-+            return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - optimise for loaded chunks
++            return this.getChunkAtIfLoadedMainThread(chunkX, chunkZ); // Paper - Perf: Optimise getChunkAt calls for loaded chunks
          }
      }
  

patches/server/Optimize-Captured-BlockEntity-Lookup.patch

@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sat, 6 Apr 2019 10:16:48 -0400
-Subject: [PATCH] Optimize Captured TileEntity Lookup
+Subject: [PATCH] Optimize Captured BlockEntity Lookup
 
 upstream was doing a containsKey/get pattern, and always doing it at that.
 that scenario is only even valid if were in the middle of a block place.
@@ -19,12 +19,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public BlockEntity getBlockEntity(BlockPos blockposition, boolean validate) {
 -        if (this.capturedTileEntities.containsKey(blockposition)) {
 -            return this.capturedTileEntities.get(blockposition);
-+        // Paper start - Optimize capturedTileEntities lookup
++        // Paper start - Perf: Optimize capturedTileEntities lookup
 +        net.minecraft.world.level.block.entity.BlockEntity blockEntity;
 +        if (!this.capturedTileEntities.isEmpty() && (blockEntity = this.capturedTileEntities.get(blockposition)) != null) {
 +            return blockEntity;
          }
-+        // Paper end
++        // Paper end - Perf: Optimize capturedTileEntities lookup
          // CraftBukkit end
          return this.isOutsideBuildHeight(blockposition) ? null : (!this.isClientSide && !io.papermc.paper.util.TickThread.isTickThread() ? null : this.getChunkAt(blockposition).getBlockEntity(blockposition, LevelChunk.EntityCreationType.IMMEDIATE)); // Paper - rewrite chunk system
      }

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

@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                              BlockPos blockposition = BlockPos.containing(d4, d5, d6);
                              BlockState iblockdata = this.level.getBlockState(blockposition);
 -                            FluidState fluid = this.level.getFluidState(blockposition);
-+                            FluidState fluid = iblockdata.getFluidState(); // Paper
++                            FluidState fluid = iblockdata.getFluidState(); // Paper - Perf: Optimize call to getFluid for explosions
  
                              if (!this.level.isInWorldBounds(blockposition)) {
                                  break;

patches/server/Optional-per-player-mob-spawns.patch

@@ -1,7 +1,7 @@
 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
 From: kickash32 <kickash32@gmail.com>
 Date: Mon, 19 Aug 2019 01:27:58 +0500
-Subject: [PATCH] implement optional per player mob spawns
+Subject: [PATCH] Optional per player mob spawns
 
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          });
      }
  
-+    // Paper start
++    // Paper start - Optional per player mob spawns
 +    public void updatePlayerMobTypeMap(Entity entity) {
 +        if (!this.level.paperConfig().entities.spawning.perPlayerMobSpawns) {
 +            return;
@@ -33,7 +33,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    public int getMobCountNear(ServerPlayer entityPlayer, net.minecraft.world.entity.MobCategory mobCategory) {
 +        return entityPlayer.mobCounts[mobCategory.ordinal()];
 +    }
-+    // Paper end
++    // Paper end - Optional per player mob spawns
 +
      private static double euclideanDistanceSquared(ChunkPos pos, Entity entity) {
          double d0 = (double) SectionPos.sectionToBlockCoord(pos.x, 8);
@@ -47,7 +47,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  this.level.timings.countNaturalMobs.startTiming(); // Paper - timings
                  int k = this.distanceManager.getNaturalSpawnChunkCount();
 -                NaturalSpawner.SpawnState spawnercreature_d = NaturalSpawner.createState(k, this.level.getAllEntities(), this::getFullChunk, new LocalMobCapCalculator(this.chunkMap));
-+                // Paper start - per player mob spawning
++                // Paper start - Optional per player mob spawns
 +                int naturalSpawnChunkCount = k;
 +                NaturalSpawner.SpawnState spawnercreature_d; // moved down
 +                if ((this.spawnFriendlies || this.spawnEnemies) && this.level.paperConfig().entities.spawning.perPlayerMobSpawns) { // don't count mobs when animals and monsters are disabled
@@ -59,7 +59,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                } else {
 +                    spawnercreature_d = NaturalSpawner.createState(naturalSpawnChunkCount, this.level.getAllEntities(), this::getFullChunk, !this.level.paperConfig().entities.spawning.perPlayerMobSpawns ? new LocalMobCapCalculator(this.chunkMap) : null, false);
 +                }
-+                // Paper end
++                // Paper end - Optional per player mob spawns
                  this.level.timings.countNaturalMobs.stopTiming(); // Paper - timings
  
                  this.lastSpawnState = spawnercreature_d;
@@ -71,10 +71,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public boolean queueHealthUpdatePacket = false;
      public net.minecraft.network.protocol.game.ClientboundSetHealthPacket queuedHealthUpdatePacket;
      // Paper end
-+    // Paper start - mob spawning rework
++    // Paper start - Optional per player mob spawns
 +    public static final int MOBCATEGORY_TOTAL_ENUMS = net.minecraft.world.entity.MobCategory.values().length;
 +    public final int[] mobCounts = new int[MOBCATEGORY_TOTAL_ENUMS]; // Paper
-+    // Paper end - mob spawning rework
++    // Paper end - Optional per player mob spawns
  
      // CraftBukkit start
      public String displayName;
@@ -86,12 +86,12 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      private NaturalSpawner() {}
  
      public static NaturalSpawner.SpawnState createState(int spawningChunkCount, Iterable<Entity> entities, NaturalSpawner.ChunkGetter chunkSource, LocalMobCapCalculator densityCapper) {
-+        // Paper start - add countMobs parameter
++        // Paper start - Optional per player mob spawns
 +        return createState(spawningChunkCount, entities, chunkSource, densityCapper, false);
 +    }
 +
 +    public static NaturalSpawner.SpawnState createState(int spawningChunkCount, Iterable<Entity> entities, NaturalSpawner.ChunkGetter chunkSource, LocalMobCapCalculator densityCapper, boolean countMobs) {
-+        // Paper end
++        // Paper end - Optional per player mob spawns
          PotentialCalculator spawnercreatureprobabilities = new PotentialCalculator();
          Object2IntOpenHashMap<MobCategory> object2intopenhashmap = new Object2IntOpenHashMap();
          Iterator iterator = entities.iterator();
@@ -100,16 +100,16 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                      }
  
 -                    if (entity instanceof Mob) {
-+                    if (densityCapper != null && entity instanceof Mob) { // Paper
++                    if (densityCapper != null && entity instanceof Mob) { // Paper - Optional per player mob spawns
                          densityCapper.addMob(chunk.getPos(), enumcreaturetype);
                      }
  
                      object2intopenhashmap.addTo(enumcreaturetype, 1);
-+                    // Paper start
++                    // Paper start - Optional per player mob spawns
 +                    if (countMobs) {
 +                        chunk.level.getChunkSource().chunkMap.updatePlayerMobTypeMap(entity);
 +                    }
-+                    // Paper end
++                    // Paper end - Optional per player mob spawns
                  });
              }
          }
@@ -118,7 +118,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              }
  
 -            if ((spawnAnimals || !enumcreaturetype.isFriendly()) && (spawnMonsters || enumcreaturetype.isFriendly()) && (rareSpawn || !enumcreaturetype.isPersistent()) && info.canSpawnForCategory(enumcreaturetype, chunk.getPos(), limit)) {
-+            // Paper start - only allow spawns upto the limit per chunk and update count afterwards
++            // Paper start - Optional per player mob spawns; only allow spawns upto the limit per chunk and update count afterwards
 +            int currEntityCount = info.mobCategoryCounts.getInt(enumcreaturetype);
 +            int k1 = limit * info.getSpawnableChunkCount() / NaturalSpawner.MAGIC_NUMBER;
 +            int difference = k1 - currEntityCount;
@@ -136,18 +136,18 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                difference = (minDiff == Integer.MAX_VALUE) ? 0 : minDiff;
 +            }
 +            if ((spawnAnimals || !enumcreaturetype.isFriendly()) && (spawnMonsters || enumcreaturetype.isFriendly()) && (rareSpawn || !enumcreaturetype.isPersistent()) && difference > 0) {
-+                // Paper end
++                // Paper end - Optional per player mob spawns
                  // CraftBukkit end
                  Objects.requireNonNull(info);
                  NaturalSpawner.SpawnPredicate spawnercreature_c = info::canSpawn;
  
                  Objects.requireNonNull(info);
 -                NaturalSpawner.spawnCategoryForChunk(enumcreaturetype, world, chunk, spawnercreature_c, info::afterSpawn);
-+                // Paper start
++                // Paper start - Optional per player mob spawns
 +                int spawnCount = NaturalSpawner.spawnCategoryForChunk(enumcreaturetype, world, chunk, spawnercreature_c, info::afterSpawn,
 +                    difference, world.paperConfig().entities.spawning.perPlayerMobSpawns ? world.getChunkSource().chunkMap::updatePlayerMobTypeMap : null);
 +                info.mobCategoryCounts.mergeInt(enumcreaturetype, spawnCount, Integer::sum);
-+                // Paper end
++                // Paper end - Optional per player mob spawns
              }
          }
  
@@ -155,18 +155,18 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      }
  
      public static void spawnCategoryForChunk(MobCategory group, ServerLevel world, LevelChunk chunk, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner) {
-+        // Paper start - add parameters and int ret type
++        // Paper start - Optional per player mob spawns
 +        spawnCategoryForChunk(group, world, chunk, checker, runner, Integer.MAX_VALUE, null);
 +    }
 +    public static int spawnCategoryForChunk(MobCategory group, ServerLevel world, LevelChunk chunk, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner, int maxSpawns, Consumer<Entity> trackEntity) {
-+        // Paper end - add parameters and int ret type
++        // Paper end - Optional per player mob spawns
          BlockPos blockposition = NaturalSpawner.getRandomPosWithin(world, chunk);
  
          if (blockposition.getY() >= world.getMinBuildHeight() + 1) {
 -            NaturalSpawner.spawnCategoryForPosition(group, world, chunk, blockposition, checker, runner);
-+            return NaturalSpawner.spawnCategoryForPosition(group, world, chunk, blockposition, checker, runner, maxSpawns, trackEntity); // Paper
++            return NaturalSpawner.spawnCategoryForPosition(group, world, chunk, blockposition, checker, runner, maxSpawns, trackEntity); // Paper - Optional per player mob spawns
          }
-+        return 0; // Paper
++        return 0; // Paper - Optional per player mob spawns
      }
  
      @VisibleForDebug
@@ -174,22 +174,22 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          });
      }
  
-+    // Paper start - add maxSpawns parameter and return spawned mobs
++    // Paper start - Optional per player mob spawns
      public static void spawnCategoryForPosition(MobCategory group, ServerLevel world, ChunkAccess chunk, BlockPos pos, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner) {
 +        spawnCategoryForPosition(group, world,chunk, pos, checker, runner, Integer.MAX_VALUE, null);
 +    }
 +    public static int spawnCategoryForPosition(MobCategory group, ServerLevel world, ChunkAccess chunk, BlockPos pos, NaturalSpawner.SpawnPredicate checker, NaturalSpawner.AfterSpawnCallback runner, int maxSpawns, Consumer<Entity> trackEntity) {
-+    // Paper end - add maxSpawns parameter and return spawned mobs
++    // Paper end - Optional per player mob spawns
          StructureManager structuremanager = world.structureManager();
          ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator();
          int i = pos.getY();
          BlockState iblockdata = world.getBlockStateIfLoadedAndInBounds(pos); // Paper - don't load chunks for mob spawn
-+        int j = 0; // Paper - moved up
++        int j = 0; // Paper - Optional per player mob spawns; moved up
  
          if (iblockdata != null && !iblockdata.isRedstoneConductor(chunk, pos)) { // Paper - don't load chunks for mob spawn
              BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos();
 -            int j = 0;
-+            //int j = 0; // Paper - moved up
++            //int j = 0; // Paper - Optional per player mob spawns; moved up
              int k = 0;
  
              while (k < 3) {
@@ -198,7 +198,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                                      PreSpawnStatus doSpawning = isValidSpawnPostitionForType(world, group, structuremanager, chunkgenerator, biomesettingsmobs_c, blockposition_mutableblockposition, d2);
                                      if (doSpawning == PreSpawnStatus.ABORT) {
 -                                        return;
-+                                        return j; // Paper
++                                        return j; // Paper - Optional per player mob spawns
                                      }
                                      if (doSpawning == PreSpawnStatus.SUCCESS && checker.test(biomesettingsmobs_c.type, blockposition_mutableblockposition, chunk)) {
                                          // Paper end
@@ -206,7 +206,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
                                          if (entityinsentient == null) {
 -                                            return;
-+                                            return j; // Paper
++                                            return j; // Paper - Optional per player mob spawns
                                          }
  
                                          entityinsentient.moveTo(d0, (double) i, d1, world.random.nextFloat() * 360.0F, 0.0F);
@@ -214,17 +214,17 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                                                  ++j;
                                                  ++k1;
                                                  runner.run(entityinsentient, chunk);
-+                                                // Paper start
++                                                // Paper start - Optional per player mob spawns
 +                                                if (trackEntity != null) {
 +                                                    trackEntity.accept(entityinsentient);
 +                                                }
-+                                                // Paper end
++                                                // Paper end - Optional per player mob spawns
                                              }
                                              // CraftBukkit end
 -                                            if (j >= entityinsentient.getMaxSpawnClusterSize()) {
 -                                                return;
-+                                            if (j >= entityinsentient.getMaxSpawnClusterSize() || j >= maxSpawns) { // Paper
++                                            if (j >= entityinsentient.getMaxSpawnClusterSize() || j >= maxSpawns) { // Paper - Optional per player mob spawns
-+                                                return j; // Paper
++                                                return j; // Paper - Optional per player mob spawns
                                              }
  
                                              if (entityinsentient.isMaxGroupSizeReached(k1)) {
@@ -232,7 +232,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              }
  
          }
-+        return j; // Paper
++        return j; // Paper - Optional per player mob spawns
      }
  
      private static boolean isRightDistanceToPlayerAndSpawnPoint(ServerLevel world, ChunkAccess chunk, BlockPos.MutableBlockPos pos, double squaredDistance) {
@@ -241,7 +241,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
              this.mobCategoryCounts.addTo(enumcreaturetype, 1);
 -            this.localMobCapCalculator.addMob(new ChunkPos(blockposition), enumcreaturetype);
-+            if (this.localMobCapCalculator != null) this.localMobCapCalculator.addMob(new ChunkPos(blockposition), enumcreaturetype); // Paper
++            if (this.localMobCapCalculator != null) this.localMobCapCalculator.addMob(new ChunkPos(blockposition), enumcreaturetype); // Paper - Optional per player mob spawns
          }
  
          public int getSpawnableChunkCount() {
@@ -249,7 +249,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              int i = limit * this.spawnableChunkCount / NaturalSpawner.MAGIC_NUMBER;
              // CraftBukkit end
  
-+            if (this.localMobCapCalculator == null) return this.mobCategoryCounts.getInt(enumcreaturetype) < i; // Paper
++            if (this.localMobCapCalculator == null) return this.mobCategoryCounts.getInt(enumcreaturetype) < i; // Paper - Optional per player mob spawns
              return this.mobCategoryCounts.getInt(enumcreaturetype) >= i ? false : this.localMobCapCalculator.canSpawn(enumcreaturetype, chunkcoordintpair);
          }
      }

patches/server/Pillager-patrol-spawn-settings-and-per-player-option.patch

@@ -29,8 +29,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
      @Override
      public int tick(ServerLevel world, boolean spawnMonsters, boolean spawnAnimals) {
--        if (world.paperConfig().entities.behavior.pillagerPatrols.disable) return 0; // Paper
+-        if (world.paperConfig().entities.behavior.pillagerPatrols.disable) return 0; // Paper - Add option to disable pillager patrols
-+        if (world.paperConfig().entities.behavior.pillagerPatrols.disable || world.paperConfig().entities.behavior.pillagerPatrols.spawnChance == 0) return 0; // Paper - Pillager patrol spawn settings and per player options
++        if (world.paperConfig().entities.behavior.pillagerPatrols.disable || world.paperConfig().entities.behavior.pillagerPatrols.spawnChance == 0) return 0; // Paper - Add option to disable pillager patrols & Pillager patrol spawn settings and per player options
          if (!spawnMonsters) {
              return 0;
          } else if (!world.getGameRules().getBoolean(GameRules.RULE_DO_PATROL_SPAWNING)) {

patches/server/Prevent-consuming-the-wrong-itemstack.patch

@@ -12,15 +12,15 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      }
  
      public void startUsingItem(InteractionHand hand) {
-+        // Paper start - forwarder to method with forceUpdate parameter
++        // Paper start - Prevent consuming the wrong itemstack
 +        this.startUsingItem(hand, false);
 +    }
 +    public void startUsingItem(InteractionHand hand, boolean forceUpdate) {
-+        // Paper end
++        // Paper end - Prevent consuming the wrong itemstack
          ItemStack itemstack = this.getItemInHand(hand);
  
 -        if (!itemstack.isEmpty() && !this.isUsingItem()) {
-+        if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper use override flag
++        if (!itemstack.isEmpty() && !this.isUsingItem() || forceUpdate) { // Paper - Prevent consuming the wrong itemstack
              this.useItem = itemstack;
              this.useItemRemaining = itemstack.getUseDuration();
              if (!this.level().isClientSide) {
@@ -28,7 +28,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  this.releaseUsingItem();
              } else {
                  if (!this.useItem.isEmpty() && this.isUsingItem()) {
-+                    this.startUsingItem(this.getUsedItemHand(), true); // Paper
++                    this.startUsingItem(this.getUsedItemHand(), true); // Paper - Prevent consuming the wrong itemstack
                      this.triggerItemUseEffects(this.useItem, 16);
                      // CraftBukkit start - fire PlayerItemConsumeEvent
                      ItemStack itemstack;

patches/server/Prevent-sync-chunk-loads-when-villagers-try-to-find-.patch

@@ -13,8 +13,8 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                  }
  
 -                BlockState blockState = world.getBlockState(globalPos.pos());
-+                BlockState blockState = world.getBlockStateIfLoaded(globalPos.pos()); // Paper
++                BlockState blockState = world.getBlockStateIfLoaded(globalPos.pos()); // Paper - Prevent sync chunk loads when villagers try to find beds
-+                if (blockState == null) { return false; } // Paper
++                if (blockState == null) { return false; } // Paper - Prevent sync chunk loads when villagers try to find beds
                  return globalPos.pos().closerToCenterThan(entity.position(), 2.0D) && blockState.is(BlockTags.BEDS) && !blockState.getValue(BedBlock.OCCUPIED);
              }
          }

patches/server/Properly-handle-BlockBreakEvent-isDropItems.patch

@@ -88,7 +88,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 -        super.playerDestroy(world, player, pos, state, blockEntity, tool);
 +    public void playerDestroy(Level world, Player player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool, boolean includeDrops, boolean dropExp) { // Paper - fix drops not preventing stats/food exhaustion
 +        super.playerDestroy(world, player, pos, state, blockEntity, tool, includeDrops, dropExp); // Paper - fix drops not preventing stats/food exhaustion
-         // Paper start
+         // Paper start - Improve Block#breakNaturally API
          this.afterDestroy(world, pos, tool);
      }
 diff --git a/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java b/src/main/java/net/minecraft/world/level/block/TurtleEggBlock.java

patches/server/Protect-Bedrock-and-End-Portal-Frames-from-being-des.patch

@@ -21,7 +21,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
                              BlockPos blockposition = BlockPos.containing(d4, d5, d6);
                              BlockState iblockdata = this.level.getBlockState(blockposition);
 +                            if (!iblockdata.isDestroyable()) continue; // Paper - Protect Bedrock and End Portal/Frames from being destroyed
-                             FluidState fluid = iblockdata.getFluidState(); // Paper
+                             FluidState fluid = iblockdata.getFluidState(); // Paper - Perf: Optimize call to getFluid for explosions
  
                              if (!this.level.isInWorldBounds(blockposition)) {
 diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java

patches/server/Show-blockstate-location-if-we-failed-to-read-it.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
          this.tileEntity = tileEntity;
  
-+        try { // Paper - show location on failure
++        try { // Paper - Show blockstate location if we failed to read it
          // Paper start
          this.snapshotDisabled = DISABLE_SNAPSHOT;
          if (DISABLE_SNAPSHOT) {
@@ -20,14 +20,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              this.load(this.snapshot);
          }
          // Paper end
-+        // Paper start - show location on failure
++        // Paper start - Show blockstate location if we failed to read it
 +        } catch (Throwable thr) {
 +            if (thr instanceof ThreadDeath) {
 +                throw (ThreadDeath)thr;
 +            }
 +            throw new RuntimeException("Failed to read BlockState at: world: " + this.getWorld().getName() + " location: (" + this.getX() + ", " + this.getY() + ", " + this.getZ() + ")", thr);
 +        }
-+        // Paper end
++        // Paper end - Show blockstate location if we failed to read it
      }
  
      protected CraftBlockEntityState(CraftBlockEntityState<T> state) {

patches/server/Validate-tripwire-hook-placement-before-update.patch

@@ -12,7 +12,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
              TripWireHookBlock.emitState(world, pos, flag4, flag5, flag2, flag3);
              if (!flag) {
-+                if (world.getBlockState(pos).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - validate
++                if (world.getBlockState(pos).getBlock() == Blocks.TRIPWIRE_HOOK) // Paper - Validate tripwire hook placement before update
                  world.setBlock(pos, (BlockState) iblockdata3.setValue(TripWireHookBlock.FACING, enumdirection), 3);
                  if (flag1) {
                      TripWireHookBlock.notifyNeighbors(block, world, pos, enumdirection);

patches/server/offset-item-frame-ticking.patch

@@ -13,7 +13,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          return entity instanceof HangingEntity;
      };
 -    private int checkInterval;
-+    private int checkInterval; { this.checkInterval = this.getId() % this.level().spigotConfig.hangingTickFrequency; } // Paper
++    private int checkInterval; { this.checkInterval = this.getId() % this.level().spigotConfig.hangingTickFrequency; } // Paper - Perf: offset item frame ticking
      public BlockPos pos;
      protected Direction direction;