diff --git a/src/pocketmine/Player.php b/src/pocketmine/Player.php
index e73825f44..ed2afbde8 100644
--- a/src/pocketmine/Player.php
+++ b/src/pocketmine/Player.php
@@ -91,7 +91,7 @@ use pocketmine\level\WeakPosition;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Vector3;
 use pocketmine\metadata\MetadataValue;
-use pocketmine\nbt\NBT;
+use pocketmine\nbt\NetworkLittleEndianNBTStream;
 use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\DoubleTag;
@@ -2834,8 +2834,8 @@ class Player extends Human implements CommandSender, ChunkLoader, IPlayer{
 
 		$t = $this->level->getTile($pos);
 		if($t instanceof Spawnable){
-			$nbt = new NBT(NBT::LITTLE_ENDIAN);
-			$nbt->read($packet->namedtag, false, true);
+			$nbt = new NetworkLittleEndianNBTStream();
+			$nbt->read($packet->namedtag);
 			$nbt = $nbt->getData();
 			if(!$t->updateCompoundTag($nbt, $this)){
 				$t->spawnTo($this);
diff --git a/src/pocketmine/Server.php b/src/pocketmine/Server.php
index e8ac70fb2..c8a14d98f 100644
--- a/src/pocketmine/Server.php
+++ b/src/pocketmine/Server.php
@@ -67,6 +67,7 @@ use pocketmine\level\LevelException;
 use pocketmine\metadata\EntityMetadataStore;
 use pocketmine\metadata\LevelMetadataStore;
 use pocketmine\metadata\PlayerMetadataStore;
+use pocketmine\nbt\BigEndianNBTStream;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
@@ -749,7 +750,7 @@ class Server{
 		if($this->shouldSavePlayerData()){
 			if(file_exists($path . "$name.dat")){
 				try{
-					$nbt = new NBT(NBT::BIG_ENDIAN);
+					$nbt = new BigEndianNBTStream();
 					$nbt->readCompressed(file_get_contents($path . "$name.dat"));
 
 					return $nbt->getData();
@@ -815,7 +816,7 @@ class Server{
 		$this->pluginManager->callEvent($ev);
 
 		if(!$ev->isCancelled()){
-			$nbt = new NBT(NBT::BIG_ENDIAN);
+			$nbt = new BigEndianNBTStream();
 			try{
 				$nbt->setData($ev->getSaveData());
 
diff --git a/src/pocketmine/item/Item.php b/src/pocketmine/item/Item.php
index e1b477d2d..5aef7797a 100644
--- a/src/pocketmine/item/Item.php
+++ b/src/pocketmine/item/Item.php
@@ -34,6 +34,7 @@ use pocketmine\item\enchantment\Enchantment;
 use pocketmine\item\enchantment\EnchantmentInstance;
 use pocketmine\level\Level;
 use pocketmine\math\Vector3;
+use pocketmine\nbt\LittleEndianNBTStream;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\ByteTag;
 use pocketmine\nbt\tag\CompoundTag;
@@ -64,7 +65,7 @@ class Item implements ItemIds, \JsonSerializable{
 		}
 
 		if(self::$cachedParser === null){
-			self::$cachedParser = new NBT(NBT::LITTLE_ENDIAN);
+			self::$cachedParser = new LittleEndianNBTStream();
 		}
 
 		self::$cachedParser->read($tag);
@@ -79,7 +80,7 @@ class Item implements ItemIds, \JsonSerializable{
 
 	private static function writeCompoundTag(CompoundTag $tag) : string{
 		if(self::$cachedParser === null){
-			self::$cachedParser = new NBT(NBT::LITTLE_ENDIAN);
+			self::$cachedParser = new LittleEndianNBTStream();
 		}
 
 		self::$cachedParser->setData($tag);
diff --git a/src/pocketmine/level/format/io/BaseLevelProvider.php b/src/pocketmine/level/format/io/BaseLevelProvider.php
index 806f1f0db..62d757375 100644
--- a/src/pocketmine/level/format/io/BaseLevelProvider.php
+++ b/src/pocketmine/level/format/io/BaseLevelProvider.php
@@ -29,7 +29,7 @@ use pocketmine\level\generator\Generator;
 use pocketmine\level\Level;
 use pocketmine\level\LevelException;
 use pocketmine\math\Vector3;
-use pocketmine\nbt\NBT;
+use pocketmine\nbt\BigEndianNBTStream;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\StringTag;
 use pocketmine\scheduler\AsyncTask;
@@ -48,7 +48,7 @@ abstract class BaseLevelProvider implements LevelProvider{
 		if(!file_exists($this->path)){
 			mkdir($this->path, 0777, true);
 		}
-		$nbt = new NBT(NBT::BIG_ENDIAN);
+		$nbt = new BigEndianNBTStream();
 		$nbt->readCompressed(file_get_contents($this->getPath() . "level.dat"));
 		$levelData = $nbt->getData()->getCompoundTag("Data");
 		if($levelData !== null){
@@ -120,7 +120,7 @@ abstract class BaseLevelProvider implements LevelProvider{
 	}
 
 	public function saveLevelData(){
-		$nbt = new NBT(NBT::BIG_ENDIAN);
+		$nbt = new BigEndianNBTStream();
 		$nbt->setData(new CompoundTag("", [
 			$this->levelData
 		]));
diff --git a/src/pocketmine/level/format/io/leveldb/LevelDB.php b/src/pocketmine/level/format/io/leveldb/LevelDB.php
index d360268c5..b59021bc9 100644
--- a/src/pocketmine/level/format/io/leveldb/LevelDB.php
+++ b/src/pocketmine/level/format/io/leveldb/LevelDB.php
@@ -32,7 +32,7 @@ use pocketmine\level\generator\Flat;
 use pocketmine\level\generator\Generator;
 use pocketmine\level\Level;
 use pocketmine\level\LevelException;
-use pocketmine\nbt\NBT;
+use pocketmine\nbt\LittleEndianNBTStream;
 use pocketmine\nbt\tag\{
 	ByteTag, CompoundTag, FloatTag, IntTag, LongTag, StringTag
 };
@@ -94,7 +94,7 @@ class LevelDB extends BaseLevelProvider{
 		if(!file_exists($this->path)){
 			mkdir($this->path, 0777, true);
 		}
-		$nbt = new NBT(NBT::LITTLE_ENDIAN);
+		$nbt = new LittleEndianNBTStream();
 		$nbt->read(substr(file_get_contents($this->getPath() . "level.dat"), 8));
 		$levelData = $nbt->getData();
 		if($levelData instanceof CompoundTag){
@@ -217,7 +217,7 @@ class LevelDB extends BaseLevelProvider{
 			new StringTag("generatorOptions", $options["preset"] ?? "")
 		]);
 
-		$nbt = new NBT(NBT::LITTLE_ENDIAN);
+		$nbt = new LittleEndianNBTStream();
 		$nbt->setData($levelData);
 		$buffer = $nbt->write();
 		file_put_contents($path . "level.dat", Binary::writeLInt(self::CURRENT_STORAGE_VERSION) . Binary::writeLInt(strlen($buffer)) . $buffer);
@@ -247,7 +247,7 @@ class LevelDB extends BaseLevelProvider{
 		$this->levelData->setInt("NetworkVersion", ProtocolInfo::CURRENT_PROTOCOL);
 		$this->levelData->setInt("StorageVersion", self::CURRENT_STORAGE_VERSION);
 
-		$nbt = new NBT(NBT::LITTLE_ENDIAN);
+		$nbt = new LittleEndianNBTStream();
 		$nbt->setData($this->levelData);
 		$buffer = $nbt->write();
 		file_put_contents($this->getPath() . "level.dat", Binary::writeLInt(self::CURRENT_STORAGE_VERSION) . Binary::writeLInt(strlen($buffer)) . $buffer);
@@ -416,7 +416,7 @@ class LevelDB extends BaseLevelProvider{
 					throw new UnsupportedChunkFormatException("don't know how to decode chunk format version $chunkVersion");
 			}
 
-			$nbt = new NBT(NBT::LITTLE_ENDIAN);
+			$nbt = new LittleEndianNBTStream();
 
 			$entities = [];
 			if(($entityData = $this->db->get($index . self::TAG_ENTITY)) !== false and strlen($entityData) > 0){
@@ -553,7 +553,7 @@ class LevelDB extends BaseLevelProvider{
 	 */
 	private function writeTags(array $targets, string $index){
 		if(!empty($targets)){
-			$nbt = new NBT(NBT::LITTLE_ENDIAN);
+			$nbt = new LittleEndianNBTStream();
 			$nbt->setData($targets);
 			$this->db->put($index, $nbt->write());
 		}else{
diff --git a/src/pocketmine/level/format/io/region/Anvil.php b/src/pocketmine/level/format/io/region/Anvil.php
index 7e6b27b43..e6e3ac085 100644
--- a/src/pocketmine/level/format/io/region/Anvil.php
+++ b/src/pocketmine/level/format/io/region/Anvil.php
@@ -27,6 +27,7 @@ use pocketmine\level\format\Chunk;
 use pocketmine\level\format\ChunkException;
 use pocketmine\level\format\io\ChunkUtils;
 use pocketmine\level\format\SubChunk;
+use pocketmine\nbt\BigEndianNBTStream;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\ByteArrayTag;
 use pocketmine\nbt\tag\CompoundTag;
@@ -83,7 +84,7 @@ class Anvil extends McRegion{
 
 		//TODO: TileTicks
 
-		$writer = new NBT(NBT::BIG_ENDIAN);
+		$writer = new BigEndianNBTStream();
 		$nbt->setName("Level");
 		$writer->setData(new CompoundTag("", [$nbt]));
 
@@ -100,7 +101,7 @@ class Anvil extends McRegion{
 	}
 
 	public function nbtDeserialize(string $data){
-		$nbt = new NBT(NBT::BIG_ENDIAN);
+		$nbt = new BigEndianNBTStream();
 		try{
 			$nbt->readCompressed($data);
 
diff --git a/src/pocketmine/level/format/io/region/McRegion.php b/src/pocketmine/level/format/io/region/McRegion.php
index addfc9b33..d073c86b0 100644
--- a/src/pocketmine/level/format/io/region/McRegion.php
+++ b/src/pocketmine/level/format/io/region/McRegion.php
@@ -30,6 +30,7 @@ use pocketmine\level\format\io\ChunkUtils;
 use pocketmine\level\format\SubChunk;
 use pocketmine\level\generator\Generator;
 use pocketmine\level\Level;
+use pocketmine\nbt\BigEndianNBTStream;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\{
 	ByteArrayTag, ByteTag, CompoundTag, IntArrayTag, IntTag, ListTag, LongTag, StringTag
@@ -102,7 +103,7 @@ class McRegion extends BaseLevelProvider{
 
 		$nbt->setTag(new ListTag("TileEntities", $tiles, NBT::TAG_Compound));
 
-		$writer = new NBT(NBT::BIG_ENDIAN);
+		$writer = new BigEndianNBTStream();
 		$nbt->setName("Level");
 		$writer->setData(new CompoundTag("", [$nbt]));
 
@@ -115,7 +116,7 @@ class McRegion extends BaseLevelProvider{
 	 * @return Chunk|null
 	 */
 	public function nbtDeserialize(string $data){
-		$nbt = new NBT(NBT::BIG_ENDIAN);
+		$nbt = new BigEndianNBTStream();
 		try{
 			$nbt->readCompressed($data);
 
@@ -258,7 +259,7 @@ class McRegion extends BaseLevelProvider{
 			new StringTag("LevelName", $name),
 			new CompoundTag("GameRules", [])
 		]);
-		$nbt = new NBT(NBT::BIG_ENDIAN);
+		$nbt = new BigEndianNBTStream();
 		$nbt->setData(new CompoundTag("", [
 			$levelData
 		]));
diff --git a/src/pocketmine/nbt/BigEndianNBTStream.php b/src/pocketmine/nbt/BigEndianNBTStream.php
new file mode 100644
index 000000000..d86d850d8
--- /dev/null
+++ b/src/pocketmine/nbt/BigEndianNBTStream.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\nbt;
+
+#ifndef COMPILE
+use pocketmine\utils\Binary;
+#endif
+
+#include <rules/NBT.h>
+
+class BigEndianNBTStream extends NBTStream{
+
+	public function getShort() : int{
+		return Binary::readShort($this->get(2));
+	}
+
+	public function getSignedShort() : int{
+		return Binary::readSignedShort($this->get(2));
+	}
+
+	public function putShort(int $v) : void{
+		$this->buffer .= Binary::writeShort($v);
+	}
+
+	public function getInt() : int{
+		return Binary::readInt($this->get(4));
+	}
+
+	public function putInt(int $v) : void{
+		$this->buffer .= Binary::writeInt($v);
+	}
+
+	public function getLong() : int{
+		return Binary::readLong($this->get(8));
+	}
+
+	public function putLong(int $v) : void{
+		$this->buffer .= Binary::writeLong($v);
+	}
+
+	public function getFloat() : float{
+		return Binary::readFloat($this->get(4));
+	}
+
+	public function putFloat(float $v) : void{
+		$this->buffer .= Binary::writeFloat($v);
+	}
+
+	public function getDouble() : float{
+		return Binary::readDouble($this->get(8));
+	}
+
+	public function putDouble(float $v) : void{
+		$this->buffer .= Binary::writeDouble($v);
+	}
+
+	public function getIntArray() : array{
+		$len = $this->getInt();
+		return array_values(unpack("N*", $this->get($len * 4)));
+	}
+
+	public function putIntArray(array $array) : void{
+		$this->putInt(count($array));
+		$this->put(pack("N*", ...$array));
+	}
+}
diff --git a/src/pocketmine/nbt/LittleEndianNBTStream.php b/src/pocketmine/nbt/LittleEndianNBTStream.php
new file mode 100644
index 000000000..c51c85ce1
--- /dev/null
+++ b/src/pocketmine/nbt/LittleEndianNBTStream.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\nbt;
+
+#ifndef COMPILE
+use pocketmine\utils\Binary;
+#endif
+
+#include <rules/NBT.h>
+
+class LittleEndianNBTStream extends NBTStream{
+
+	public function getShort() : int{
+		return Binary::readLShort($this->get(2));
+	}
+
+	public function getSignedShort() : int{
+		return Binary::readSignedLShort($this->get(2));
+	}
+
+	public function putShort(int $v) : void{
+		$this->put(Binary::writeLShort($v));
+	}
+
+	public function getInt() : int{
+		return Binary::readLInt($this->get(4));
+	}
+
+	public function putInt(int $v) : void{
+		$this->put(Binary::writeLInt($v));
+	}
+
+	public function getLong() : int{
+		return Binary::readLLong($this->get(8));
+	}
+
+	public function putLong(int $v) : void{
+		$this->put(Binary::writeLLong($v));
+	}
+
+	public function getFloat() : float{
+		return Binary::readLFloat($this->get(4));
+	}
+
+	public function putFloat(float $v) : void{
+		$this->put(Binary::writeLFloat($v));
+	}
+
+	public function getDouble() : float{
+		return Binary::readLDouble($this->get(8));
+	}
+
+	public function putDouble(float $v) : void{
+		$this->put(Binary::writeLDouble($v));
+	}
+
+	public function getIntArray() : array{
+		$len = $this->getInt();
+		return array_values(unpack("V*", $this->get($len * 4)));
+	}
+
+	public function putIntArray(array $array) : void{
+		$this->putInt(count($array));
+		$this->put(pack("V*", ...$array));
+	}
+}
diff --git a/src/pocketmine/nbt/NBT.php b/src/pocketmine/nbt/NBT.php
index debc56946..3827884e6 100644
--- a/src/pocketmine/nbt/NBT.php
+++ b/src/pocketmine/nbt/NBT.php
@@ -36,22 +36,11 @@ use pocketmine\nbt\tag\IntArrayTag;
 use pocketmine\nbt\tag\IntTag;
 use pocketmine\nbt\tag\ListTag;
 use pocketmine\nbt\tag\LongTag;
-use pocketmine\nbt\tag\NamedTag;
 use pocketmine\nbt\tag\ShortTag;
 use pocketmine\nbt\tag\StringTag;
 use pocketmine\nbt\tag\Tag;
 
-#ifndef COMPILE
-use pocketmine\utils\Binary;
-#endif
-
-
-#include <rules/NBT.h>
-
-/**
- * Named Binary Tag encoder/decoder
- */
-class NBT{
+abstract class NBT{
 
 	public const LITTLE_ENDIAN = 0;
 	public const BIG_ENDIAN = 1;
@@ -68,17 +57,12 @@ class NBT{
 	public const TAG_Compound = 10;
 	public const TAG_IntArray = 11;
 
-	public $buffer;
-	public $offset;
-	public $endianness;
-	private $data;
-
 	/**
 	 * @param int $type
 	 *
 	 * @return Tag
 	 */
-	public static function createTag(int $type){
+	public static function createTag(int $type) : Tag{
 		switch($type){
 			case self::TAG_End:
 				return new EndTag();
@@ -172,260 +156,4 @@ class NBT{
 
 		return true;
 	}
-
-	public function get($len){
-		if($len < 0){
-			$this->offset = strlen($this->buffer) - 1;
-			return "";
-		}elseif($len === true){
-			return substr($this->buffer, $this->offset);
-		}
-
-		return $len === 1 ? $this->buffer{$this->offset++} : substr($this->buffer, ($this->offset += $len) - $len, $len);
-	}
-
-	public function put($v){
-		$this->buffer .= $v;
-	}
-
-	public function feof() : bool{
-		return !isset($this->buffer{$this->offset});
-	}
-
-	public function __construct($endianness = self::LITTLE_ENDIAN){
-		$this->offset = 0;
-		$this->endianness = $endianness & 0x01;
-	}
-
-	public function read($buffer, $doMultiple = false, bool $network = false){
-		$this->offset = 0;
-		$this->buffer = $buffer;
-		$this->data = $this->readTag($network);
-		if($doMultiple and $this->offset < strlen($this->buffer)){
-			$this->data = [$this->data];
-			do{
-				$this->data[] = $this->readTag($network);
-			}while($this->offset < strlen($this->buffer));
-		}
-		$this->buffer = "";
-	}
-
-	public function readCompressed($buffer){
-		$this->read(zlib_decode($buffer));
-	}
-
-	/**
-	 * @param bool $network
-	 *
-	 * @return string|bool
-	 */
-	public function write(bool $network = false){
-		$this->offset = 0;
-		$this->buffer = "";
-
-		if($this->data instanceof CompoundTag){
-			$this->writeTag($this->data, $network);
-
-			return $this->buffer;
-		}elseif(is_array($this->data)){
-			foreach($this->data as $tag){
-				$this->writeTag($tag, $network);
-			}
-			return $this->buffer;
-		}
-
-		return false;
-	}
-
-	public function writeCompressed($compression = ZLIB_ENCODING_GZIP, $level = 7){
-		if(($write = $this->write()) !== false){
-			return zlib_encode($write, $compression, $level);
-		}
-
-		return false;
-	}
-
-	public function readTag(bool $network = false){
-		if($this->feof()){
-			return new EndTag();
-		}
-
-		$tagType = $this->getByte();
-		$tag = self::createTag($tagType);
-
-		if($tag instanceof NamedTag){
-			$tag->setName($this->getString($network));
-			$tag->read($this, $network);
-		}
-
-		return $tag;
-	}
-
-	public function writeTag(Tag $tag, bool $network = false){
-		$this->putByte($tag->getType());
-		if($tag instanceof NamedTag){
-			$this->putString($tag->getName(), $network);
-		}
-		$tag->write($this, $network);
-	}
-
-	public function getByte() : int{
-		return Binary::readByte($this->get(1));
-	}
-
-	public function getSignedByte() : int{
-		return Binary::readSignedByte($this->get(1));
-	}
-
-	public function putByte($v){
-		$this->buffer .= Binary::writeByte($v);
-	}
-
-	public function getShort() : int{
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readShort($this->get(2)) : Binary::readLShort($this->get(2));
-	}
-
-	public function getSignedShort() : int{
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readSignedShort($this->get(2)) : Binary::readSignedLShort($this->get(2));
-	}
-
-	public function putShort($v){
-		$this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeShort($v) : Binary::writeLShort($v);
-	}
-
-	public function getInt(bool $network = false) : int{
-		if($network === true){
-			return Binary::readVarInt($this->buffer, $this->offset);
-		}
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readInt($this->get(4)) : Binary::readLInt($this->get(4));
-	}
-
-	public function putInt($v, bool $network = false){
-		if($network === true){
-			$this->buffer .= Binary::writeVarInt($v);
-		}else{
-			$this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeInt($v) : Binary::writeLInt($v);
-		}
-	}
-
-	public function getLong(bool $network = false) : int{
-		if($network){
-			return Binary::readVarLong($this->buffer, $this->offset);
-		}
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readLong($this->get(8)) : Binary::readLLong($this->get(8));
-	}
-
-	public function putLong($v, bool $network = false){
-		if($network){
-			$this->buffer .= Binary::writeVarLong($v);
-		}else{
-			$this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeLong($v) : Binary::writeLLong($v);
-		}
-	}
-
-	public function getFloat() : float{
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readFloat($this->get(4)) : Binary::readLFloat($this->get(4));
-	}
-
-	public function putFloat($v){
-		$this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeFloat($v) : Binary::writeLFloat($v);
-	}
-
-	public function getDouble() : float{
-		return $this->endianness === self::BIG_ENDIAN ? Binary::readDouble($this->get(8)) : Binary::readLDouble($this->get(8));
-	}
-
-	public function putDouble($v){
-		$this->buffer .= $this->endianness === self::BIG_ENDIAN ? Binary::writeDouble($v) : Binary::writeLDouble($v);
-	}
-
-	public function getString(bool $network = false){
-		$len = $network ? Binary::readUnsignedVarInt($this->buffer, $this->offset) : $this->getShort();
-		return $this->get($len);
-	}
-
-	public function putString($v, bool $network = false){
-		if($network === true){
-			$this->put(Binary::writeUnsignedVarInt(strlen($v)));
-		}else{
-			$this->putShort(strlen($v));
-		}
-		$this->buffer .= $v;
-	}
-
-	public function getArray() : array{
-		$data = [];
-		self::toArray($data, $this->data);
-		return $data;
-	}
-
-	private static function toArray(array &$data, Tag $tag){
-		/** @var CompoundTag[]|ListTag[]|IntArrayTag[] $tag */
-		foreach($tag as $key => $value){
-			if($value instanceof CompoundTag or $value instanceof ListTag or $value instanceof IntArrayTag){
-				$data[$key] = [];
-				self::toArray($data[$key], $value);
-			}else{
-				$data[$key] = $value->getValue();
-			}
-		}
-	}
-
-	public static function fromArrayGuesser($key, $value){
-		if(is_int($value)){
-			return new IntTag($key, $value);
-		}elseif(is_float($value)){
-			return new FloatTag($key, $value);
-		}elseif(is_string($value)){
-			return new StringTag($key, $value);
-		}elseif(is_bool($value)){
-			return new ByteTag($key, $value ? 1 : 0);
-		}
-
-		return null;
-	}
-
-	private static function fromArray(Tag $tag, array $data, callable $guesser){
-		foreach($data as $key => $value){
-			if(is_array($value)){
-				$isNumeric = true;
-				$isIntArray = true;
-				foreach($value as $k => $v){
-					if(!is_numeric($k)){
-						$isNumeric = false;
-						break;
-					}elseif(!is_int($v)){
-						$isIntArray = false;
-					}
-				}
-				$tag{$key} = $isNumeric ? ($isIntArray ? new IntArrayTag($key, []) : new ListTag($key, [])) : new CompoundTag($key, []);
-				self::fromArray($tag->{$key}, $value, $guesser);
-			}else{
-				$v = call_user_func($guesser, $key, $value);
-				if($v instanceof Tag){
-					$tag{$key} = $v;
-				}
-			}
-		}
-	}
-
-	public function setArray(array $data, callable $guesser = null){
-		$this->data = new CompoundTag("", []);
-		self::fromArray($this->data, $data, $guesser ?? [self::class, "fromArrayGuesser"]);
-	}
-
-	/**
-	 * @return CompoundTag|array
-	 */
-	public function getData(){
-		return $this->data;
-	}
-
-	/**
-	 * @param CompoundTag|array $data
-	 */
-	public function setData($data){
-		$this->data = $data;
-	}
-
 }
diff --git a/src/pocketmine/nbt/NBTStream.php b/src/pocketmine/nbt/NBTStream.php
new file mode 100644
index 000000000..8531fb34e
--- /dev/null
+++ b/src/pocketmine/nbt/NBTStream.php
@@ -0,0 +1,271 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\nbt;
+
+use pocketmine\nbt\tag\ByteTag;
+use pocketmine\nbt\tag\CompoundTag;
+use pocketmine\nbt\tag\EndTag;
+use pocketmine\nbt\tag\FloatTag;
+use pocketmine\nbt\tag\IntArrayTag;
+use pocketmine\nbt\tag\IntTag;
+use pocketmine\nbt\tag\ListTag;
+use pocketmine\nbt\tag\NamedTag;
+use pocketmine\nbt\tag\StringTag;
+use pocketmine\nbt\tag\Tag;
+#ifndef COMPILE
+use pocketmine\utils\Binary;
+#endif
+
+#include <rules/NBT.h>
+
+/**
+ * Base Named Binary Tag encoder/decoder
+ */
+abstract class NBTStream{
+
+	public $buffer;
+	public $offset;
+	private $data;
+
+	public function get($len) : string{
+		if($len < 0){
+			$this->offset = strlen($this->buffer) - 1;
+			return "";
+		}elseif($len === true){
+			return substr($this->buffer, $this->offset);
+		}
+
+		return $len === 1 ? $this->buffer{$this->offset++} : substr($this->buffer, ($this->offset += $len) - $len, $len);
+	}
+
+	public function put(string $v) : void{
+		$this->buffer .= $v;
+	}
+
+	public function feof() : bool{
+		return !isset($this->buffer{$this->offset});
+	}
+
+	public function __construct(){
+		$this->offset = 0;
+		$this->buffer = "";
+	}
+
+	public function read(string $buffer, bool $doMultiple = false) : void{
+		$this->offset = 0;
+		$this->buffer = $buffer;
+		$this->data = $this->readTag();
+		if($doMultiple and $this->offset < strlen($this->buffer)){
+			$this->data = [$this->data];
+			do{
+				$this->data[] = $this->readTag();
+			}while($this->offset < strlen($this->buffer));
+		}
+		$this->buffer = "";
+	}
+
+	public function readCompressed(string $buffer) : void{
+		$this->read(zlib_decode($buffer));
+	}
+
+	/**
+	 * @return bool|string
+	 */
+	public function write(){
+		$this->offset = 0;
+		$this->buffer = "";
+
+		if($this->data instanceof CompoundTag){
+			$this->writeTag($this->data);
+
+			return $this->buffer;
+		}elseif(is_array($this->data)){
+			foreach($this->data as $tag){
+				$this->writeTag($tag);
+			}
+			return $this->buffer;
+		}
+
+		return false;
+	}
+
+	public function writeCompressed(int $compression = ZLIB_ENCODING_GZIP, int $level = 7){
+		if(($write = $this->write()) !== false){
+			return zlib_encode($write, $compression, $level);
+		}
+
+		return false;
+	}
+
+	public function readTag() : Tag{
+		if($this->feof()){
+			return new EndTag();
+		}
+
+		$tagType = $this->getByte();
+		$tag = NBT::createTag($tagType);
+
+		if($tag instanceof NamedTag){
+			$tag->setName($this->getString());
+			$tag->read($this);
+		}
+
+		return $tag;
+	}
+
+	public function writeTag(Tag $tag) : void{
+		$this->putByte($tag->getType());
+		if($tag instanceof NamedTag){
+			$this->putString($tag->getName());
+		}
+		$tag->write($this);
+	}
+
+	public function getByte() : int{
+		return Binary::readByte($this->get(1));
+	}
+
+	public function getSignedByte() : int{
+		return Binary::readSignedByte($this->get(1));
+	}
+
+	public function putByte(int $v) : void{
+		$this->buffer .= Binary::writeByte($v);
+	}
+
+	abstract public function getShort() : int;
+
+	abstract public function getSignedShort() : int;
+
+	abstract public function putShort(int $v) : void;
+
+
+	abstract public function getInt() : int;
+
+	abstract public function putInt(int $v) : void;
+
+	abstract public function getLong() : int;
+
+	abstract public function putLong(int $v) : void;
+
+
+	abstract public function getFloat() : float;
+
+	abstract public function putFloat(float $v) : void;
+
+
+	abstract public function getDouble() : float;
+
+	abstract public function putDouble(float $v) : void;
+
+	public function getString() : string{
+		return $this->get($this->getShort());
+	}
+
+	public function putString(string $v) : void{
+		$this->putShort(strlen($v));
+		$this->put($v);
+	}
+
+	abstract public function getIntArray() : array;
+
+	abstract public function putIntArray(array $array) : void;
+
+
+
+	public function getArray() : array{
+		$data = [];
+		self::toArray($data, $this->data);
+		return $data;
+	}
+
+	private static function toArray(array &$data, Tag $tag) : void{
+		/** @var CompoundTag[]|ListTag[]|IntArrayTag[] $tag */
+		foreach($tag as $key => $value){
+			if($value instanceof CompoundTag or $value instanceof ListTag or $value instanceof IntArrayTag){
+				$data[$key] = [];
+				self::toArray($data[$key], $value);
+			}else{
+				$data[$key] = $value->getValue();
+			}
+		}
+	}
+
+	public static function fromArrayGuesser(string $key, $value) : ?NamedTag{
+		if(is_int($value)){
+			return new IntTag($key, $value);
+		}elseif(is_float($value)){
+			return new FloatTag($key, $value);
+		}elseif(is_string($value)){
+			return new StringTag($key, $value);
+		}elseif(is_bool($value)){
+			return new ByteTag($key, $value ? 1 : 0);
+		}
+
+		return null;
+	}
+
+	private static function fromArray(Tag $tag, array $data, callable $guesser) : void{
+		foreach($data as $key => $value){
+			if(is_array($value)){
+				$isNumeric = true;
+				$isIntArray = true;
+				foreach($value as $k => $v){
+					if(!is_numeric($k)){
+						$isNumeric = false;
+						break;
+					}elseif(!is_int($v)){
+						$isIntArray = false;
+					}
+				}
+				$tag{$key} = $isNumeric ? ($isIntArray ? new IntArrayTag($key, []) : new ListTag($key, [])) : new CompoundTag($key, []);
+				self::fromArray($tag->{$key}, $value, $guesser);
+			}else{
+				$v = call_user_func($guesser, $key, $value);
+				if($v instanceof Tag){
+					$tag{$key} = $v;
+				}
+			}
+		}
+	}
+
+	public function setArray(array $data, callable $guesser = null) : void{
+		$this->data = new CompoundTag("", []);
+		self::fromArray($this->data, $data, $guesser ?? [self::class, "fromArrayGuesser"]);
+	}
+
+	/**
+	 * @return CompoundTag|array
+	 */
+	public function getData(){
+		return $this->data;
+	}
+
+	/**
+	 * @param CompoundTag|array $data
+	 */
+	public function setData($data) : void{
+		$this->data = $data;
+	}
+}
diff --git a/src/pocketmine/nbt/NetworkLittleEndianNBTStream.php b/src/pocketmine/nbt/NetworkLittleEndianNBTStream.php
new file mode 100644
index 000000000..4bb583783
--- /dev/null
+++ b/src/pocketmine/nbt/NetworkLittleEndianNBTStream.php
@@ -0,0 +1,74 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\nbt;
+
+#ifndef COMPILE
+use pocketmine\utils\Binary;
+#endif
+
+#include <rules/NBT.h>
+
+class NetworkLittleEndianNBTStream extends LittleEndianNBTStream{
+
+	public function getInt() : int{
+		return Binary::readVarInt($this->buffer, $this->offset);
+	}
+
+	public function putInt(int $v) : void{
+		$this->put(Binary::writeVarInt($v));
+	}
+
+	public function getLong() : int{
+		return Binary::readVarLong($this->buffer, $this->offset);
+	}
+
+	public function putLong(int $v) : void{
+		$this->put(Binary::writeVarLong($v));
+	}
+
+	public function getString() : string{
+		return $this->get(Binary::readUnsignedVarInt($this->buffer, $this->offset));
+	}
+
+	public function putString(string $v) : void{
+		$this->put(Binary::writeUnsignedVarInt(strlen($v)) . $v);
+	}
+
+	public function getIntArray() : array{
+		$len = $this->getInt(); //varint
+		$ret = [];
+		for($i = 0; $i < $len; ++$i){
+			$ret[] = $this->getInt(); //varint
+		}
+
+		return $ret;
+	}
+
+	public function putIntArray(array $array) : void{
+		$this->putInt(count($array)); //varint
+		foreach($array as $v){
+			$this->putInt($v); //varint
+		}
+	}
+}
diff --git a/src/pocketmine/nbt/tag/ByteArrayTag.php b/src/pocketmine/nbt/tag/ByteArrayTag.php
index 8d4555d33..0023958c7 100644
--- a/src/pocketmine/nbt/tag/ByteArrayTag.php
+++ b/src/pocketmine/nbt/tag/ByteArrayTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,12 +44,12 @@ class ByteArrayTag extends NamedTag{
 		return NBT::TAG_ByteArray;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
-		$this->value = $nbt->get($nbt->getInt($network));
+	public function read(NBTStream $nbt) : void{
+		$this->value = $nbt->get($nbt->getInt());
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
-		$nbt->putInt(strlen($this->value), $network);
+	public function write(NBTStream $nbt) : void{
+		$nbt->putInt(strlen($this->value));
 		$nbt->put($this->value);
 	}
 
diff --git a/src/pocketmine/nbt/tag/ByteTag.php b/src/pocketmine/nbt/tag/ByteTag.php
index aca900764..dd93a7864 100644
--- a/src/pocketmine/nbt/tag/ByteTag.php
+++ b/src/pocketmine/nbt/tag/ByteTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,11 +44,11 @@ class ByteTag extends NamedTag{
 		return NBT::TAG_Byte;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = $nbt->getSignedByte();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		$nbt->putByte($this->value);
 	}
 
diff --git a/src/pocketmine/nbt/tag/CompoundTag.php b/src/pocketmine/nbt/tag/CompoundTag.php
index 1322e7472..e17f1f495 100644
--- a/src/pocketmine/nbt/tag/CompoundTag.php
+++ b/src/pocketmine/nbt/tag/CompoundTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -427,23 +428,23 @@ class CompoundTag extends NamedTag implements \ArrayAccess{
 		return NBT::TAG_Compound;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = [];
 		do{
-			$tag = $nbt->readTag($network);
+			$tag = $nbt->readTag();
 			if($tag instanceof NamedTag and $tag->__name !== ""){
 				$this->{$tag->__name} = $tag;
 			}
 		}while(!($tag instanceof EndTag) and !$nbt->feof());
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		foreach($this as $tag){
 			if($tag instanceof Tag and !($tag instanceof EndTag)){
-				$nbt->writeTag($tag, $network);
+				$nbt->writeTag($tag);
 			}
 		}
-		$nbt->writeTag(new EndTag, $network);
+		$nbt->writeTag(new EndTag);
 	}
 
 	public function __toString(){
diff --git a/src/pocketmine/nbt/tag/DoubleTag.php b/src/pocketmine/nbt/tag/DoubleTag.php
index bc3f1cf57..1ce8f91d5 100644
--- a/src/pocketmine/nbt/tag/DoubleTag.php
+++ b/src/pocketmine/nbt/tag/DoubleTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,11 +44,11 @@ class DoubleTag extends NamedTag{
 		return NBT::TAG_Double;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = $nbt->getDouble();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		$nbt->putDouble($this->value);
 	}
 
diff --git a/src/pocketmine/nbt/tag/EndTag.php b/src/pocketmine/nbt/tag/EndTag.php
index c063196d4..11d692131 100644
--- a/src/pocketmine/nbt/tag/EndTag.php
+++ b/src/pocketmine/nbt/tag/EndTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 class EndTag extends Tag{
 
@@ -31,11 +32,11 @@ class EndTag extends Tag{
 		return NBT::TAG_End;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 
 	}
 }
diff --git a/src/pocketmine/nbt/tag/FloatTag.php b/src/pocketmine/nbt/tag/FloatTag.php
index 4855bd916..41424f7fe 100644
--- a/src/pocketmine/nbt/tag/FloatTag.php
+++ b/src/pocketmine/nbt/tag/FloatTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,11 +44,11 @@ class FloatTag extends NamedTag{
 		return NBT::TAG_Float;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = $nbt->getFloat();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		$nbt->putFloat($this->value);
 	}
 
diff --git a/src/pocketmine/nbt/tag/IntArrayTag.php b/src/pocketmine/nbt/tag/IntArrayTag.php
index bb1c9e8ea..30c61d4f9 100644
--- a/src/pocketmine/nbt/tag/IntArrayTag.php
+++ b/src/pocketmine/nbt/tag/IntArrayTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,14 +44,12 @@ class IntArrayTag extends NamedTag{
 		return NBT::TAG_IntArray;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
-		$size = $nbt->getInt($network);
-		$this->value = array_values(unpack($nbt->endianness === NBT::LITTLE_ENDIAN ? "V*" : "N*", $nbt->get($size * 4)));
+	public function read(NBTStream $nbt) : void{
+		$this->value = $nbt->getIntArray();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
-		$nbt->putInt(count($this->value), $network);
-		$nbt->put(pack($nbt->endianness === NBT::LITTLE_ENDIAN ? "V*" : "N*", ...$this->value));
+	public function write(NBTStream $nbt) : void{
+		$nbt->putIntArray($this->value);
 	}
 
 	public function __toString(){
diff --git a/src/pocketmine/nbt/tag/IntTag.php b/src/pocketmine/nbt/tag/IntTag.php
index 093cd9342..ed38d756a 100644
--- a/src/pocketmine/nbt/tag/IntTag.php
+++ b/src/pocketmine/nbt/tag/IntTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -41,12 +42,12 @@ class IntTag extends NamedTag{
 		return NBT::TAG_Int;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
-		$this->value = $nbt->getInt($network);
+	public function read(NBTStream $nbt) : void{
+		$this->value = $nbt->getInt();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
-		$nbt->putInt($this->value, $network);
+	public function write(NBTStream $nbt) : void{
+		$nbt->putInt($this->value);
 	}
 
 	/**
diff --git a/src/pocketmine/nbt/tag/ListTag.php b/src/pocketmine/nbt/tag/ListTag.php
index 6b3db2636..b7f723c88 100644
--- a/src/pocketmine/nbt/tag/ListTag.php
+++ b/src/pocketmine/nbt/tag/ListTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -163,20 +164,20 @@ class ListTag extends NamedTag implements \ArrayAccess, \Countable{
 		return $this->tagType;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = [];
 		$this->tagType = $nbt->getByte();
-		$size = $nbt->getInt($network);
+		$size = $nbt->getInt();
 
 		$tagBase = NBT::createTag($this->tagType);
 		for($i = 0; $i < $size and !$nbt->feof(); ++$i){
 			$tag = clone $tagBase;
-			$tag->read($nbt, $network);
+			$tag->read($nbt);
 			$this->{$i} = $tag;
 		}
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		if($this->tagType === NBT::TAG_End){ //previously empty list, try detecting type from tag children
 			$id = NBT::TAG_End;
 			foreach($this as $tag){
@@ -200,9 +201,9 @@ class ListTag extends NamedTag implements \ArrayAccess, \Countable{
 				$tags[] = $tag;
 			}
 		}
-		$nbt->putInt(count($tags), $network);
+		$nbt->putInt(count($tags));
 		foreach($tags as $tag){
-			$tag->write($nbt, $network);
+			$tag->write($nbt);
 		}
 	}
 
diff --git a/src/pocketmine/nbt/tag/LongTag.php b/src/pocketmine/nbt/tag/LongTag.php
index 5fe001327..e435afefc 100644
--- a/src/pocketmine/nbt/tag/LongTag.php
+++ b/src/pocketmine/nbt/tag/LongTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,12 +44,12 @@ class LongTag extends NamedTag{
 		return NBT::TAG_Long;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
-		$this->value = $nbt->getLong($network);
+	public function read(NBTStream $nbt) : void{
+		$this->value = $nbt->getLong();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
-		$nbt->putLong($this->value, $network);
+	public function write(NBTStream $nbt) : void{
+		$nbt->putLong($this->value);
 	}
 
 	/**
diff --git a/src/pocketmine/nbt/tag/ShortTag.php b/src/pocketmine/nbt/tag/ShortTag.php
index f3b5b5705..6eabeb222 100644
--- a/src/pocketmine/nbt/tag/ShortTag.php
+++ b/src/pocketmine/nbt/tag/ShortTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,11 +44,11 @@ class ShortTag extends NamedTag{
 		return NBT::TAG_Short;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
+	public function read(NBTStream $nbt) : void{
 		$this->value = $nbt->getSignedShort();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
+	public function write(NBTStream $nbt) : void{
 		$nbt->putShort($this->value);
 	}
 
diff --git a/src/pocketmine/nbt/tag/StringTag.php b/src/pocketmine/nbt/tag/StringTag.php
index f0ad886b8..53deb5d87 100644
--- a/src/pocketmine/nbt/tag/StringTag.php
+++ b/src/pocketmine/nbt/tag/StringTag.php
@@ -24,6 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\nbt\tag;
 
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 #include <rules/NBT.h>
 
@@ -43,12 +44,12 @@ class StringTag extends NamedTag{
 		return NBT::TAG_String;
 	}
 
-	public function read(NBT $nbt, bool $network = false) : void{
-		$this->value = $nbt->getString($network);
+	public function read(NBTStream $nbt) : void{
+		$this->value = $nbt->getString();
 	}
 
-	public function write(NBT $nbt, bool $network = false) : void{
-		$nbt->putString($this->value, $network);
+	public function write(NBTStream $nbt) : void{
+		$nbt->putString($this->value);
 	}
 
 	/**
diff --git a/src/pocketmine/nbt/tag/Tag.php b/src/pocketmine/nbt/tag/Tag.php
index 74e4d7b78..f4233378e 100644
--- a/src/pocketmine/nbt/tag/Tag.php
+++ b/src/pocketmine/nbt/tag/Tag.php
@@ -26,7 +26,7 @@ declare(strict_types=1);
  */
 namespace pocketmine\nbt\tag;
 
-use pocketmine\nbt\NBT;
+use pocketmine\nbt\NBTStream;
 
 abstract class Tag extends \stdClass{
 
@@ -42,9 +42,9 @@ abstract class Tag extends \stdClass{
 		$this->value = $value;
 	}
 
-	abstract public function write(NBT $nbt, bool $network = false) : void;
+	abstract public function write(NBTStream $nbt) : void;
 
-	abstract public function read(NBT $nbt, bool $network = false) : void;
+	abstract public function read(NBTStream $nbt) : void;
 
 	public function __toString(){
 		return (string) $this->value;
diff --git a/src/pocketmine/tile/Spawnable.php b/src/pocketmine/tile/Spawnable.php
index 598f6211c..427512577 100644
--- a/src/pocketmine/tile/Spawnable.php
+++ b/src/pocketmine/tile/Spawnable.php
@@ -25,6 +25,7 @@ namespace pocketmine\tile;
 
 use pocketmine\level\Level;
 use pocketmine\nbt\NBT;
+use pocketmine\nbt\NetworkLittleEndianNBTStream;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\network\mcpe\protocol\BlockEntityDataPacket;
 use pocketmine\Player;
@@ -92,11 +93,11 @@ abstract class Spawnable extends Tile{
 	final public function getSerializedSpawnCompound() : string{
 		if($this->spawnCompoundCache === null){
 			if(self::$nbtWriter === null){
-				self::$nbtWriter = new NBT(NBT::LITTLE_ENDIAN);
+				self::$nbtWriter = new NetworkLittleEndianNBTStream();
 			}
 
 			self::$nbtWriter->setData($this->getSpawnCompound());
-			$this->spawnCompoundCache = self::$nbtWriter->write(true);
+			$this->spawnCompoundCache = self::$nbtWriter->write();
 		}
 
 		return $this->spawnCompoundCache;
diff --git a/tests/preprocessor b/tests/preprocessor
index 86961f819..316fd5606 160000
--- a/tests/preprocessor
+++ b/tests/preprocessor
@@ -1 +1 @@
-Subproject commit 86961f81970a49f8c25e18d0d414961d7142a84d
+Subproject commit 316fd5606fef1191e7f228d3156dd1518c33aba4