Check Beehive obstruction first on exit

lithium-mixin-config.md

@@ -141,6 +141,10 @@ NBT tags use a fastutil hashmap instead of a standard HashMap
 (default: `true`)  
 Optimizations related to blocks  
 
+### `mixin.block.beehive`
+(default: `true`)  
+Beehives check if they are obstructed before performing expensive nbt copy operations for each exit attempt.  
+
 ### `mixin.block.flatten_states`
 (default: `true`)  
 FluidStates store directly whether they are empty  

src/main/java/me/jellysquid/mods/lithium/mixin/block/beehive/BeehiveBlockEntityMixin.java

@@ -0,0 +1,35 @@
+package me.jellysquid.mods.lithium.mixin.block.beehive;
+
+import net.minecraft.block.BeehiveBlock;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.entity.BeehiveBlockEntity;
+import net.minecraft.entity.Entity;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.Direction;
+import net.minecraft.world.World;
+import org.jetbrains.annotations.Nullable;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Coerce;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+import java.util.List;
+
+@Mixin(BeehiveBlockEntity.class)
+public class BeehiveBlockEntityMixin {
+
+    @Inject(
+            method = "releaseBee",
+            at = @At(value = "INVOKE", shift = At.Shift.BEFORE, target = "Lnet/minecraft/nbt/NbtCompound;copy()Lnet/minecraft/nbt/NbtCompound;"),
+            cancellable = true
+    )
+    private static void exitEarlyIfHiveObstructed(World world, BlockPos pos, BlockState state, @Coerce Object bee, @Nullable List<Entity> entities, BeehiveBlockEntity.BeeState beeState, @Nullable BlockPos flowerPos, CallbackInfoReturnable<Boolean> cir) {
+        Direction direction = state.get(BeehiveBlock.FACING);
+        BlockPos blockPos = pos.offset(direction);
+
+        if (beeState != BeehiveBlockEntity.BeeState.EMERGENCY && !world.getBlockState(blockPos).getCollisionShape(world, blockPos).isEmpty()) {
+            cir.setReturnValue(false);
+        };
+    }
+}

src/main/java/me/jellysquid/mods/lithium/mixin/block/beehive/package-info.java

@@ -0,0 +1,4 @@
+@MixinConfigOption(description = "Beehives check if they are obstructed before performing expensive nbt copy operations for each exit attempt.")
+package me.jellysquid.mods.lithium.mixin.block.beehive;
+
+import net.caffeinemc.gradle.MixinConfigOption;

src/main/resources/lithium.mixins.json

@@ -50,6 +50,7 @@
     "alloc.explosion_behavior.EntityExplosionBehaviorMixin",
     "alloc.nbt.NbtCompoundMixin",
     "alloc.nbt.NbtCompoundMixin$Type",
+    "block.beehive.BeehiveBlockEntityMixin",
     "block.flatten_states.FluidStateMixin",
     "block.hopper.AbstractMinecartEntityMixin",
     "block.hopper.ChestBoatEntityMixin",