disable regressed mixin and doggy pls check the commented mixins

src/main/java/net/gensokyoreimagined/nitori/common/util/EquipmentSlotConstants.java

@@ -0,0 +1,12 @@
+package net.gensokyoreimagined.nitori.common.util;
+
+import net.minecraft.world.entity.EquipmentSlot;
+
+/**
+ * Pre-initialized constants to avoid unnecessary allocations.
+ */
+public final class EquipmentSlotConstants {
+    private EquipmentSlotConstants() {}
+
+    public static final EquipmentSlot[] ALL = EquipmentSlot.values();
+}

src/main/java/net/gensokyoreimagined/nitori/mixin/alloc/enum_values/living_entity/LivingEntityMixin.java

@@ -0,0 +1,23 @@
+package net.gensokyoreimagined.nitori.mixin.alloc.enum_values.living_entity;
+
+//import net.gensokyoreimagined.nitori.common.util.EquipmentSlotConstants;
+//import net.minecraft.world.entity.EquipmentSlot;
+//import net.minecraft.world.entity.LivingEntity;
+//import org.spongepowered.asm.mixin.Mixin;
+//import org.spongepowered.asm.mixin.injection.At;
+//import org.spongepowered.asm.mixin.injection.Redirect;
+//
+//@Mixin(LivingEntity.class)
+//public class LivingEntityMixin {
+//
+//    @Redirect(
+//            method = "collectEquipmentChanges()Ljava/util/Map;",
+//            at = @At(
+//                    value = "INVOKE",
+//                    target = "Lnet/minecraft/world/entity/LivingEntity;equipmentHasChanged(Lnet/minecraft/world/item/ItemStack;Lnet/minecraft/world/item/ItemStack;)Z"
+//            )
+//    )
+//    private EquipmentSlot[] removeAllocation() {
+//        return EquipmentSlotConstants.ALL;
+//    }
+//}

src/main/java/net/gensokyoreimagined/nitori/mixin/alloc/nbt/NbtCompoundMixin.java

@@ -0,0 +1,90 @@
+package net.gensokyoreimagined.nitori.mixin.alloc.nbt;
+
+//import com.google.common.collect.Maps;
+//import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+//import net.minecraft.nbt.CompoundTag;
+//import net.minecraft.nbt.Tag;
+//import org.spongepowered.asm.mixin.Final;
+//import org.spongepowered.asm.mixin.Mixin;
+//import org.spongepowered.asm.mixin.Overwrite;
+//import org.spongepowered.asm.mixin.Shadow;
+//import org.spongepowered.asm.mixin.injection.At;
+//import org.spongepowered.asm.mixin.injection.ModifyArg;
+//import org.spongepowered.asm.mixin.injection.ModifyVariable;
+//import org.spongepowered.asm.mixin.injection.Redirect;
+//
+//import java.util.HashMap;
+//import java.util.Map;
+//
+///**
+// * Use {@link Object2ObjectOpenHashMap} instead of {@link HashMap} to reduce NBT memory consumption and improve
+// * iteration speed.
+// *
+// * @author Maity
+// */
+//@Mixin(CompoundTag.class)
+//public class CompoundTagMixin {
+//
+//    @Shadow
+//    @Final
+//    private Map<String, Tag> entries;
+//
+//    @ModifyArg(
+//            method = "<init>()V",
+//            at = @At(value = "INVOKE", target = "Lnet/minecraft/nbt/CompoundTag;<init>(Ljava/util/Map;)V")
+//    )
+//    private static Map<String, Tag> useFasterCollection(Map<String, Tag> oldMap) {
+//        return new Object2ObjectOpenHashMap<>();
+//    }
+//
+//    @Redirect(
+//            method = "<init>()V",
+//            at = @At(
+//                    value = "INVOKE",
+//                    target = "Lcom/google/common/collect/Maps;newHashMap()Ljava/util/HashMap;",
+//                    remap = false
+//            )
+//    )
+//    private static HashMap<?, ?> removeOldMapAlloc() {
+//        return null;
+//    }
+//
+//    /**
+//     * @reason Use faster collection
+//     * @author Maity
+//     */
+//    @Overwrite
+//    public CompoundTag copy() {
+//        // [VanillaCopy] HashMap is replaced with Object2ObjectOpenHashMap
+//        var map = new Object2ObjectOpenHashMap<>(Maps.transformValues(this.entries, Tag::copy));
+//        return new CompoundTag(map);
+//    }
+//
+//    @Mixin(targets = "net.minecraft.nbt.CompoundTag$1")
+//    static class Type {
+//
+//        @ModifyVariable(
+//                method = "loadCompound",
+//                at = @At(
+//                        value = "INVOKE_ASSIGN",
+//                        target = "Lcom/google/common/collect/Maps;newHashMap()Ljava/util/HashMap;",
+//                        remap = false
+//                )
+//        )
+//        private static Map<String, Tag> useFasterCollection(Map<String, Tag> map) {
+//            return new Object2ObjectOpenHashMap<>();
+//        }
+//
+//        @Redirect(
+//                method = "loadCompound",
+//                at = @At(
+//                        value = "INVOKE",
+//                        target = "Lcom/google/common/collect/Maps;newHashMap()Ljava/util/HashMap;",
+//                        remap = false
+//                )
+//        )
+//        private static HashMap<?, ?> removeOldMapAlloc() {
+//            return null;
+//        }
+//    }
+//}

src/main/java/net/gensokyoreimagined/nitori/mixin/needs_testing/MixinLevel.java

@@ -12,7 +12,7 @@
 //
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
-package net.gensokyoreimagined.nitori.mixin;
+package net.gensokyoreimagined.nitori.mixin.needs_testing;
 
 import com.google.common.collect.Lists;
 import net.gensokyoreimagined.nitori.common.util.collections.HashedReferenceList;

src/main/resources/mixins.core.json

@@ -17,7 +17,6 @@
     "MixinEntitySectionStorage",
     "MixinGameRules",
     "MixinIteratorSafeOrderedReferenceSet",
-    "MixinLevel",
     "MixinLevelStorageAccess",
     "MixinMob",
     "math.sine_lut.MixinMth",