Optimize block collision check

src/main/java/net/minestom/server/entity/Entity.java

@@ -29,6 +29,7 @@ import net.minestom.server.instance.Chunk;
 import net.minestom.server.instance.Instance;
 import net.minestom.server.instance.InstanceManager;
 import net.minestom.server.instance.block.Block;
+import net.minestom.server.instance.block.BlockGetter;
 import net.minestom.server.instance.block.BlockHandler;
 import net.minestom.server.network.packet.server.play.*;
 import net.minestom.server.network.player.PlayerConnection;
@@ -573,8 +574,9 @@ public class Entity implements Viewable, Tickable, EventHandler<EntityEvent>, Da
                         final Chunk chunk = ChunkUtils.retrieve(instance, currentChunk, x, z);
                         if (!ChunkUtils.isLoaded(chunk))
                             continue;
-
-                        final Block block = chunk.getBlock(x, y, z);
+                        final Block block = chunk.getBlock(x, y, z, BlockGetter.Condition.CACHED);
+                        if (block == null)
+                            continue;
                         final BlockHandler handler = block.handler();
                         if (handler != null) {
                             // checks that we are actually in the block, and not just here because of a rounding error

src/main/java/net/minestom/server/instance/DynamicChunk.java

@@ -96,13 +96,16 @@ public class DynamicChunk extends Chunk {
     }
 
     @Override
-    public @NotNull Block getBlock(int x, int y, int z) {
+    public @Nullable Block getBlock(int x, int y, int z, @NotNull Condition condition) {
         // Verify if the block object is present
-        final int index = ChunkUtils.getBlockIndex(x, y, z);
-        final var entry = entries.get(index);
+        final var entry = !entries.isEmpty() ?
+                entries.get(ChunkUtils.getBlockIndex(x, y, z)) : null;
         if (entry != null) {
             return entry;
         }
+        if (condition != Condition.NONE) {
+            return null;
+        }
         // Retrieve the block from state id
         final Section section = retrieveSection(y);
         final short blockStateId = section.getBlockAt(x, y, z);

src/main/java/net/minestom/server/instance/Instance.java

@@ -520,11 +520,11 @@ public abstract class Instance implements BlockGetter, BlockSetter, Tickable, Ta
     }
 
     @Override
-    public @NotNull Block getBlock(int x, int y, int z) {
+    public @Nullable Block getBlock(int x, int y, int z, @NotNull Condition condition) {
         final Chunk chunk = getChunkAt(x, z);
         Check.notNull(chunk, "The chunk at {0}:{1} is not loaded", x, z);
         synchronized (chunk) {
-            return chunk.getBlock(x, y, z);
+            return chunk.getBlock(x, y, z, condition);
         }
     }
 

src/main/java/net/minestom/server/instance/block/BlockGetter.java

@@ -2,17 +2,33 @@ package net.minestom.server.instance.block;
 
 import net.minestom.server.coordinate.Point;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Objects;
 
 public interface BlockGetter {
-    @NotNull Block getBlock(int x, int y, int z);
+    @Nullable Block getBlock(int x, int y, int z, @NotNull Condition condition);
+
+    default @Nullable Block getBlock(@NotNull Point point, @NotNull Condition condition) {
+        return getBlock(point.blockX(), point.blockY(), point.blockZ(), condition);
+    }
+
+    default @NotNull Block getBlock(int x, int y, int z) {
+        return Objects.requireNonNull(getBlock(x, y, z, Condition.NONE));
+    }
 
-    /**
-     * Gets block from given position.
-     *
-     * @param point position to get the block from
-     * @return Block at given position.
-     */
     default @NotNull Block getBlock(@NotNull Point point) {
-        return getBlock(point.blockX(), point.blockY(), point.blockZ());
+        return Objects.requireNonNull(getBlock(point, Condition.NONE));
+    }
+
+    enum Condition {
+        /**
+         * Returns a block no matter what.
+         */
+        NONE,
+        /**
+         * Returns a block only if it has a handler or nbt.
+         */
+        CACHED
     }
 }

src/main/java/net/minestom/server/utils/chunk/ChunkUtils.java

@@ -85,9 +85,8 @@ public final class ChunkUtils {
     }
 
     public static boolean same(@NotNull Chunk chunk, double x, double z) {
-        final int chunkX = getChunkCoordinate(x);
-        final int chunkZ = getChunkCoordinate(z);
-        return chunk.getChunkX() == chunkX && chunk.getChunkZ() == chunkZ;
+        return chunk.getChunkX() == getChunkCoordinate(x) &&
+                chunk.getChunkZ() == getChunkCoordinate(z);
     }
 
     public static Chunk retrieve(Instance instance, Chunk originChunk, double x, double z) {