Remove obsolete chunk merging

connector/src/main/java/org/geysermc/connector/network/session/cache/ChunkCache.java

@@ -46,27 +46,12 @@ public class ChunkCache {
         chunks = cache ? new Long2ObjectOpenHashMap<>() : null;
     }
 
-    public Column addToCache(Column chunk) {
+    public void addToCache(Column chunk) {
         if (!cache) {
-            return chunk;
+            return;
         }
 
-        long chunkPosition = MathUtils.chunkPositionToLong(chunk.getX(), chunk.getZ());
+        chunks.put(MathUtils.chunkPositionToLong(chunk.getX(), chunk.getZ()), chunk);
-        Column existingChunk;
-        if (chunk.getBiomeData() == null // Only consider merging columns if the new chunk isn't a full chunk
-            && (existingChunk = chunks.getOrDefault(chunkPosition, null)) != null) { // Column is already present in cache, we can merge with existing
-            boolean changed = false;
-            for (int i = 0; i < chunk.getChunks().length; i++) { // The chunks member is final, so chunk.getChunks() will probably be inlined and then completely optimized away
-                if (chunk.getChunks()[i] != null) {
-                    existingChunk.getChunks()[i] = chunk.getChunks()[i];
-                    changed = true;
-                }
-            }
-            return changed ? existingChunk : null;
-        } else {
-            chunks.put(chunkPosition, chunk);
-            return chunk;
-        }
     }
 
     public Column getChunk(int chunkX, int chunkZ)  {

connector/src/main/java/org/geysermc/connector/network/translators/java/world/JavaChunkDataTranslator.java

@@ -52,15 +52,12 @@ public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPac
             ChunkUtils.updateChunkPosition(session, session.getPlayerEntity().getPosition().toInt());
         }
 
-        // Merge received column with cache on network thread
+        session.getChunkCache().addToCache(packet.getColumn());
-        Column mergedColumn = session.getChunkCache().addToCache(packet.getColumn());
+        Column column = packet.getColumn();
-        if (mergedColumn == null) { // There were no changes?!?
-            return;
-        }
 
         GeyserConnector.getInstance().getGeneralThreadPool().execute(() -> {
             try {
-                ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(session, mergedColumn);
+                ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(session, column);
                 ChunkSection[] sections = chunkData.getSections();
 
                 // Find highest section
@@ -90,7 +87,7 @@ public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPac
                         (section != null ? section : session.getBlockTranslator().getEmptyChunkSection()).writeToNetwork(byteBuf);
                     }
 
-                    byteBuf.writeBytes(BiomeTranslator.toBedrockBiome(mergedColumn.getBiomeData())); // Biomes - 256 bytes
+                    byteBuf.writeBytes(BiomeTranslator.toBedrockBiome(column.getBiomeData())); // Biomes - 256 bytes
                     byteBuf.writeByte(0); // Border blocks - Edu edition only
                     VarInts.writeUnsignedInt(byteBuf, 0); // extra data length, 0 for now
 
@@ -109,8 +106,8 @@ public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPac
                 LevelChunkPacket levelChunkPacket = new LevelChunkPacket();
                 levelChunkPacket.setSubChunksLength(sectionCount);
                 levelChunkPacket.setCachingEnabled(false);
-                levelChunkPacket.setChunkX(mergedColumn.getX());
+                levelChunkPacket.setChunkX(column.getX());
-                levelChunkPacket.setChunkZ(mergedColumn.getZ());
+                levelChunkPacket.setChunkZ(column.getZ());
                 levelChunkPacket.setData(payload);
                 session.sendUpstreamPacket(levelChunkPacket);
             } catch (Exception ex) {