Added an allocaction cache for WorldSection arrays which decreased allocation rates from 10gb/s to 150mb/s

src/main/java/me/cortex/voxy/common/world/ActiveSectionTracker.java

@@ -2,6 +2,9 @@ package me.cortex.voxy.common.world;
 
 import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
 import me.cortex.voxy.common.util.VolatileHolder;
+import me.cortex.voxy.common.world.other.Mapper;
+
+import java.util.Arrays;
 
 public class ActiveSectionTracker {
     //Deserialize into the supplied section, returns true on success, false on failure
@@ -60,6 +63,10 @@ public class ActiveSectionTracker {
                 section.release();
                 return null;
             }
+            if (status == 1) {
+                //We need to set the data to air as it is undefined state
+                Arrays.fill(section.data, Mapper.AIR);
+            }
             return section;
         } else {
             WorldSection section = null;

src/main/java/me/cortex/voxy/common/world/WorldSection.java

@@ -1,20 +1,26 @@
 package me.cortex.voxy.common.world;
 
 
+import java.util.ArrayDeque;
 import java.util.Arrays;
+import java.util.Deque;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
 //Represents a loaded world section at a specific detail level
 // holds a 32x32x32 region of detail
 public final class WorldSection {
+    private static final int ARRAY_REUSE_CACHE_SIZE = 256;
+    private static final Deque<long[]> ARRAY_REUSE_CACHE = new ArrayDeque<>(1024);
+
+
     public final int lvl;
     public final int x;
     public final int y;
     public final int z;
     public final long key;
 
-    long[] data;
+    long[] data = null;
     private final ActiveSectionTracker tracker;
     public final AtomicBoolean inSaveQueue = new AtomicBoolean();
 
@@ -29,8 +35,15 @@ public final class WorldSection {
         this.key = WorldEngine.getWorldSectionId(lvl, x, y, z);
         this.tracker = tracker;
 
+        if (!ARRAY_REUSE_CACHE.isEmpty()) {
+            synchronized (ARRAY_REUSE_CACHE) {
+                this.data = ARRAY_REUSE_CACHE.poll();
+            }
+        }
+        if (this.data == null) {
             this.data = new long[32 * 32 * 32];
         }
+    }
 
     @Override
     public int hashCode() {
@@ -73,6 +86,11 @@ public final class WorldSection {
         }
         boolean isFreed = witness == 1;
         if (isFreed) {
+            if (ARRAY_REUSE_CACHE.size() < ARRAY_REUSE_CACHE_SIZE) {
+                synchronized (ARRAY_REUSE_CACHE) {
+                    ARRAY_REUSE_CACHE.add(this.data);
+                }
+            }
             this.data = null;
         }
         return isFreed;