Remove making unused copy of visible chunks in ChunkMap#processUnloads

patches/server/0458-incremental-chunk-and-player-saving.patch

@@ -165,7 +165,7 @@ index 626bcbc6dd013260c3f8b38a1d14e7ba35dc1e01..9e96b0465717bfa761289c255fd8d2f1
          for (int i = 0; i < this.futures.length(); ++i) {
              CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = (CompletableFuture) this.futures.get(i);
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 847c4705f88b999976c9a99519939eb2e71e7f1d..1ff5ca11e3550dc730dd9d44acd666119f42898f 100644
+index 847c4705f88b999976c9a99519939eb2e71e7f1d..42814c37f558b3fc0e59ba80c2ddaba3e6596d57 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -101,6 +101,7 @@ import net.minecraft.world.level.levelgen.structure.templatesystem.StructureMana
@@ -241,16 +241,22 @@ index 847c4705f88b999976c9a99519939eb2e71e7f1d..1ff5ca11e3550dc730dd9d44acd66611
      protected void saveAllChunks(boolean flush) {
          if (flush) {
              List<ChunkHolder> list = (List) this.visibleChunkMap.values().stream().filter(ChunkHolder::wasAccessibleSinceLastSave).peek(ChunkHolder::refreshAccessibility).collect(Collectors.toList());
-@@ -734,7 +793,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -732,13 +791,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
-         int l = 0;
-         ObjectIterator objectiterator = this.visibleChunkMap.values().iterator();
- 
--        while (l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) {
-+        while (false && l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) { // Paper - incremental chunk and player saving
-             if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) {
-                 ++l;
          }
-@@ -776,6 +835,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+ 
+         int l = 0;
+-        ObjectIterator objectiterator = this.visibleChunkMap.values().iterator();
+-
+-        while (l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) {
+-            if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) {
+-                ++l;
+-            }
+-        }
++        // Paper - incremental chunk and player saving
+ 
+     }
+ 
+@@ -776,6 +829,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
  
                          this.level.unload(chunk);
                      }
@@ -258,7 +264,7 @@ index 847c4705f88b999976c9a99519939eb2e71e7f1d..1ff5ca11e3550dc730dd9d44acd66611
  
                      this.lightEngine.updateChunkStatus(ichunkaccess.getPos());
                      this.lightEngine.tryScheduleUpdate();
-@@ -1173,6 +1233,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1173,6 +1227,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
              asyncSaveData, chunk);
  
          chunk.setUnsaved(false);
@@ -266,7 +272,7 @@ index 847c4705f88b999976c9a99519939eb2e71e7f1d..1ff5ca11e3550dc730dd9d44acd66611
      }
      // Paper end
  
-@@ -1182,6 +1243,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1182,6 +1237,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
          if (!chunk.isUnsaved()) {
              return false;
          } else {

patches/server/0472-Implement-Chunk-Priority-Urgency-System-for-Chunks.patch

@@ -360,7 +360,7 @@ index 9e96b0465717bfa761289c255fd8d2f1df1be3d8..87271552aa85626f22f7f8569c8fb48f
          return this.isEntityTickingReady;
      }
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c0442f262f13 100644
+index 42814c37f558b3fc0e59ba80c2ddaba3e6596d57..d9f1456f5f217655396c4095e1595f55024efa76 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -128,6 +128,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@@ -448,7 +448,7 @@ index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c044
  
                  list1.add(playerchunk);
                  list.add(completablefuture);
-@@ -875,11 +925,19 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -869,11 +919,19 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
          if (requiredStatus == ChunkStatus.EMPTY) {
              return this.scheduleChunkLoad(chunkcoordintpair);
          } else {
@@ -469,7 +469,7 @@ index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c044
  
              if (optional.isPresent() && ((ChunkAccess) optional.get()).getStatus().isOrAfter(requiredStatus)) {
                  CompletableFuture<Either<ChunkAccess, ChunkHolder.ChunkLoadingFailure>> completablefuture = requiredStatus.load(this.level, this.structureManager, this.lightEngine, (ichunkaccess) -> {
-@@ -891,6 +949,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -885,6 +943,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
              } else {
                  return this.scheduleChunkGeneration(holder, requiredStatus);
              }
@@ -477,7 +477,7 @@ index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c044
          }
      }
  
-@@ -947,14 +1006,24 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -941,14 +1000,24 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
          };
  
          CompletableFuture<CompoundTag> chunkSaveFuture = this.level.asyncChunkTaskManager.getChunkSaveFuture(pos.x, pos.z);
@@ -507,7 +507,7 @@ index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c044
          return ret;
          // Paper end
      }
-@@ -1006,7 +1075,10 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1000,7 +1069,10 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
                  this.releaseLightTicket(chunkcoordintpair);
                  return CompletableFuture.completedFuture(Either.right(playerchunk_failure));
              });
@@ -519,7 +519,7 @@ index 1ff5ca11e3550dc730dd9d44acd666119f42898f..0b8b813d329aa1de912057ddeb52c044
      }
  
      protected void releaseLightTicket(ChunkPos pos) {
-@@ -1090,7 +1162,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1084,7 +1156,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
              long i = chunkHolder.getPos().toLong();
  
              Objects.requireNonNull(chunkHolder);

patches/server/0492-Improve-Chunk-Status-Transition-Speed.patch

@@ -54,7 +54,7 @@ index 87271552aa85626f22f7f8569c8fb48fe4b30bf3..80aae4303e011dad13ce818136f0383e
      public ChunkHolder(ChunkPos pos, int level, LevelHeightAccessor world, LevelLightEngine lightingProvider, ChunkHolder.LevelChangeListener levelUpdateListener, ChunkHolder.PlayerProvider playersWatchingChunkProvider) {
          this.futures = new AtomicReferenceArray(ChunkHolder.CHUNK_STATUSES.size());
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 0b8b813d329aa1de912057ddeb52c0442f262f13..a97bf06a0e8ba1cd612f7e8be2585bfdfbdfa969 100644
+index d9f1456f5f217655396c4095e1595f55024efa76..71cfc51223e12cdd1030f0e5bb2263d594fa4c3c 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -636,7 +636,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@@ -66,7 +66,7 @@ index 0b8b813d329aa1de912057ddeb52c0442f262f13..a97bf06a0e8ba1cd612f7e8be2585bfd
      }
  
      @Nullable
-@@ -1046,6 +1046,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1040,6 +1040,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
              return "chunkGenerate " + requiredStatus.getName();
          });
          Executor executor = (runnable) -> {

patches/server/0739-Fix-chunks-refusing-to-unload-at-low-TPS.patch

@@ -10,10 +10,10 @@ chunk future to complete. We can simply schedule to the immediate
 executor to get this effect, rather than the main mailbox.
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 2af478902b528f335797c691730afb2657d4e6c4..71ca2c2edc6a89e9365b4686c233f60cea12a472 100644
+index 76f40342098c1cc1ffb855ef41349953f8b94d0f..0090ef1df54c5b438bc4b23d2ed8978575e48dae 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
-@@ -1259,9 +1259,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1253,9 +1253,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
  
                  return chunk;
              });

patches/server/0740-Do-not-allow-ticket-level-changes-while-unloading-pl.patch

@@ -8,7 +8,7 @@ Sync loading the chunk at this stage would cause it to load
 older data, as well as screwing our region state.
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 71ca2c2edc6a89e9365b4686c233f60cea12a472..09bb6e14864af68e9833e171a33aa981f51c8569 100644
+index 0090ef1df54c5b438bc4b23d2ed8978575e48dae..e0b445c13bae4205bb33b082dfb0b6b6a4351e6d 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -296,6 +296,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@@ -27,7 +27,7 @@ index 71ca2c2edc6a89e9365b4686c233f60cea12a472..09bb6e14864af68e9833e171a33aa981
          if (k > ChunkMap.MAX_CHUNK_DISTANCE && level > ChunkMap.MAX_CHUNK_DISTANCE) {
              return holder;
          } else {
-@@ -870,6 +872,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -864,6 +866,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
              if (completablefuture1 != completablefuture) {
                  this.scheduleUnload(pos, holder);
              } else {
@@ -40,7 +40,7 @@ index 71ca2c2edc6a89e9365b4686c233f60cea12a472..09bb6e14864af68e9833e171a33aa981
                  // Paper start
                  boolean removed;
                  if ((removed = this.pendingUnloads.remove(pos, holder)) && ichunkaccess != null) {
-@@ -906,6 +914,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -900,6 +908,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
                          this.regionManagers.get(index).removeChunk(holder.pos.x, holder.pos.z);
                      }
                  } // Paper end

patches/server/0753-Do-not-copy-visible-chunks.patch

@@ -35,7 +35,7 @@ index b3516862d796c2d9fcc1c67a6073445403d73088..b61abf227a04b4565c2525e5f469db30
              List<ChunkHolder> allChunks = new ArrayList<>(visibleChunks.values());
              List<ServerPlayer> players = world.players;
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 09bb6e14864af68e9833e171a33aa981f51c8569..53399b80e60872224ba6b77f41626b2beef236d2 100644
+index e0b445c13bae4205bb33b082dfb0b6b6a4351e6d..9c729af97a7658778bd96c121823bc9023f35c12 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -120,9 +120,11 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@@ -117,16 +117,7 @@ index 09bb6e14864af68e9833e171a33aa981f51c8569..53399b80e60872224ba6b77f41626b2b
  
              if (playerchunk != null) {
                  this.pendingUnloads.put(j, playerchunk);
-@@ -854,7 +861,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -927,7 +934,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
-         }
- 
-         int l = 0;
--        ObjectIterator objectiterator = this.visibleChunkMap.values().iterator();
-+        Iterator objectiterator = this.updatingChunks.getVisibleValuesCopy().iterator(); // Paper
- 
-         while (false && l < 20 && shouldKeepTicking.getAsBoolean() && objectiterator.hasNext()) { // Paper - incremental chunk and player saving
-             if (this.saveChunkIfNeeded((ChunkHolder) objectiterator.next())) {
-@@ -933,7 +940,12 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
          if (!this.modified) {
              return false;
          } else {
@@ -140,7 +131,7 @@ index 09bb6e14864af68e9833e171a33aa981f51c8569..53399b80e60872224ba6b77f41626b2b
              this.modified = false;
              return true;
          }
-@@ -1411,7 +1423,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1405,7 +1417,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
  
              this.viewDistance = j;
              this.distanceManager.updatePlayerTickets(this.viewDistance + 1);
@@ -149,7 +140,7 @@ index 09bb6e14864af68e9833e171a33aa981f51c8569..53399b80e60872224ba6b77f41626b2b
  
              while (objectiterator.hasNext()) {
                  ChunkHolder playerchunk = (ChunkHolder) objectiterator.next();
-@@ -1454,7 +1466,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1448,7 +1460,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
      }
  
      public int size() {
@@ -158,7 +149,7 @@ index 09bb6e14864af68e9833e171a33aa981f51c8569..53399b80e60872224ba6b77f41626b2b
      }
  
      public DistanceManager getDistanceManager() {
-@@ -1462,13 +1474,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1456,13 +1468,13 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
      }
  
      protected Iterable<ChunkHolder> getChunks() {

patches/server/0770-Oprimise-map-impl-for-tracked-players.patch

@@ -7,7 +7,7 @@ Reference2BooleanOpenHashMap is going to have
 better lookups than HashMap.
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 53399b80e60872224ba6b77f41626b2beef236d2..087eec200cec325edb11f7fbae1a81a216b019d6 100644
+index 9c729af97a7658778bd96c121823bc9023f35c12..ad0997ec4e36937e937195d95df701b1954ef885 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -108,6 +108,7 @@ import org.apache.logging.log4j.LogManager;
@@ -18,7 +18,7 @@ index 53399b80e60872224ba6b77f41626b2beef236d2..087eec200cec325edb11f7fbae1a81a2
  
  public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider {
  
-@@ -2101,7 +2102,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -2095,7 +2096,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
          final Entity entity;
          private final int range;
          SectionPos lastSectionPos;

patches/server/0823-Actually-unload-POI-data.patch

@@ -10,7 +10,7 @@ This patch also prevents the saving/unloading of POI data when
 world saving is disabled.
 
 diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
-index 0c046cd0fab44aecd41ef5c1477b13ea9606aee4..0e474819c506e6d5e1731d49610c7cf472aa49c4 100644
+index 3be958576599995e083d4bea85e89099911795a6..cd85d1d97b8fbc8979100f2097e77070a840f3b1 100644
 --- a/src/main/java/net/minecraft/server/level/ChunkMap.java
 +++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
 @@ -792,6 +792,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
@@ -30,7 +30,7 @@ index 0c046cd0fab44aecd41ef5c1477b13ea9606aee4..0e474819c506e6d5e1731d49610c7cf4
  
      private void processUnloads(BooleanSupplier shouldKeepTicking) {
          LongIterator longiterator = this.toDrop.iterator();
-@@ -1006,6 +1007,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1000,6 +1001,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
                          this.regionManagers.get(index).removeChunk(holder.pos.x, holder.pos.z);
                      }
                      // Paper end
@@ -38,7 +38,7 @@ index 0c046cd0fab44aecd41ef5c1477b13ea9606aee4..0e474819c506e6d5e1731d49610c7cf4
                      if (ichunkaccess instanceof LevelChunk) {
                          ((LevelChunk) ichunkaccess).setLoaded(false);
                      }
-@@ -1034,6 +1036,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1028,6 +1030,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
                      for (int index = 0, len = this.regionManagers.size(); index < len; ++index) {
                          this.regionManagers.get(index).removeChunk(holder.pos.x, holder.pos.z);
                      }
@@ -46,7 +46,7 @@ index 0c046cd0fab44aecd41ef5c1477b13ea9606aee4..0e474819c506e6d5e1731d49610c7cf4
                  } // Paper end
                  } finally { this.unloadingPlayerChunk = unloadingBefore; } // Paper - do not allow ticket level changes while unloading chunks
  
-@@ -1110,6 +1113,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+@@ -1104,6 +1107,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
                  }
                  this.poiManager.loadInData(pos, chunkHolder.poiData);
                  chunkHolder.tasks.forEach(Runnable::run);