diff --git a/uppsrc/Core/CharSet.cpp b/uppsrc/Core/CharSet.cpp
index ff4a0e94d..bfc80e625 100644
--- a/uppsrc/Core/CharSet.cpp
+++ b/uppsrc/Core/CharSet.cpp
@@ -2209,7 +2209,7 @@ bool utf8check(const char *_s, int len)
 				if(s + 1 >= lim ||
 				   s[0] < 0x80 || s[0] >= 0xc0 ||
 				   s[1] < 0x80 || s[1] >= 0xc0)
-				   	return false;
+					return false;
 				codePoint = ((code - 0xE0) << 12) + ((s[0] - 0x80) << 6) + s[1] - 0x80;
 				if(codePoint < 0x0800 || codePoint > 0xFFFF)
 					return false;
@@ -2221,7 +2221,7 @@ bool utf8check(const char *_s, int len)
 				   s[0] < 0x80 || s[0] >= 0xc0 ||
 				   s[1] < 0x80 || s[1] >= 0xc0 ||
 				   s[2] < 0x80 || s[2] >= 0xc0)
-				   	return false;
+					return false;
 				codePoint = ((code - 0xf0) << 18) + ((s[0] - 0x80) << 12) +
 				            ((s[1] - 0x80) << 6) + s[2] - 0x80;
 				if(codePoint < 0x010000 || codePoint > 0x10FFFF)
diff --git a/uppsrc/Core/CoWork.cpp b/uppsrc/Core/CoWork.cpp
index 1958e8c10..302734301 100644
--- a/uppsrc/Core/CoWork.cpp
+++ b/uppsrc/Core/CoWork.cpp
@@ -79,7 +79,7 @@ bool CoWork::Pool::DoJob()
 		LLOG("Quit thread");
 		return true;
 	}
-	LLOG("DoJob " << p.scheduled - 1 << ", todo: " << job.work->todo << " (CoWork " << FormatIntHex(job.work) << ")");
+	LLOG("DoJob " << p.scheduled - 1 << " (CoWork " << FormatIntHex(job.work) << ")");
 	finlock = false;
 	Function<void ()> fn = pick(job.fn);
 	CoWork *work = job.work;
@@ -147,7 +147,9 @@ CoWork::MJob& CoWork::PushJob(Function<void ()>&& fn)
 	Pool& p = GetPool();
 	MJob& job = p.jobs[p.scheduled++];
 	job.fn = pick(fn);
-	LLOG("Adding job " << p.scheduled - 1 << "; todo: " << todo << " (CoWork " << FormatIntHex(this) << ")");
+	job.work = NULL;
+	job.started = NULL;
+	LLOG("Adding job " << p.scheduled - 1);
 	if(p.waiting_threads) {
 		LLOG("Releasing thread waiting for job: " << p.waiting_threads);
 		p.waiting_threads--;
@@ -237,11 +239,14 @@ CoWork::CoWork()
 {
 	LLOG("CoWork constructed " << FormatHex(this));
 	todo = 0;
+//	SetMagic(magic, sizeof(magic));
 }
 
 CoWork::~CoWork()
 {
+//	CheckMagic(magic, sizeof(magic));
 	Finish();
+//	CheckMagic(magic, sizeof(magic));
 	LLOG("~CoWork " << FormatIntHex(this));
 }
 
diff --git a/uppsrc/Core/CoWork.h b/uppsrc/Core/CoWork.h
index 26b2e2835..f4a114527 100644
--- a/uppsrc/Core/CoWork.h
+++ b/uppsrc/Core/CoWork.h
@@ -39,6 +39,7 @@ public:
 	static thread_local bool is_worker;
 	static thread_local Pool *pool;
 
+//	byte magic[sizeof(ConditionVariable)];
 	ConditionVariable waitforfinish;
 	int               todo;
 
diff --git a/uppsrc/Core/Debug.cpp b/uppsrc/Core/Debug.cpp
index 273f69c21..5963370e3 100644
--- a/uppsrc/Core/Debug.cpp
+++ b/uppsrc/Core/Debug.cpp
@@ -190,6 +190,19 @@ void LogHex(const WString& s)
 	HexDump(VppLog(), ~s, sizeof(wchar) * s.GetLength());
 }
 
+void SetMagic(byte *t, int count)
+{
+	for(int i = 0; i < count; i++)
+		t[i] = i;
+}
+
+void CheckMagic(byte *t, int count)
+{
+	for(int i = 0; i < count; i++)
+		if(t[i] != i)
+			Panic("Failed magic area!");
+}
+
 #if defined(PLATFORM_WIN32) && !defined(PLATFORM_WINCE)
 
 template <class T>
diff --git a/uppsrc/Core/Diag.h b/uppsrc/Core/Diag.h
index 87ee8e6c2..71e151945 100644
--- a/uppsrc/Core/Diag.h
+++ b/uppsrc/Core/Diag.h
@@ -33,6 +33,9 @@ void     HexDump(Stream& s, const void *ptr, int size, int maxsize = INT_MAX);
 void     LogHex(const String& s);
 void     LogHex(const WString& s);
 
+void     SetMagic(byte *t, int count);
+void     CheckMagic(byte *t, int count);
+
 String        GetTypeName(const char *type_name);
 inline String GetTypeName(const ::std::type_info& tinfo)   { return GetTypeName(tinfo.name()); }
 
diff --git a/uppsrc/Core/Stream.cpp b/uppsrc/Core/Stream.cpp
index 414f60fff..8bb603d06 100644
--- a/uppsrc/Core/Stream.cpp
+++ b/uppsrc/Core/Stream.cpp
@@ -147,24 +147,22 @@ bool Stream::GetAll(Huge& h, size_t size)
 
 String Stream::Get(int size)
 {
-	if(size < 32 * 1024*1024) {
-		StringBuffer b(size);
-		int n = Get(~b, size);
-		b.SetCount(n);
-		String s = b;
-		s.Trim(n);
-		return s;
-	}
-	else {
-		Huge h;
-		Get(h, size);
-		return h.Get();
-	}
+	StringBuffer b(size);
+	int n = Get(~b, size);
+	b.SetCount(n);
+	return b;
 }
 
 String Stream::GetAll(int size)
 {
-	String result = Get(size);
+	String result;
+	if(size < 4 * 1024*1024)
+		result = Get(size);
+	else {
+		Huge h;
+		Get(h, size);
+		result = h.Get();
+	}
 	if(result.GetCount() != size) {
 		LoadError();
 		result = String::GetVoid();
diff --git a/uppsrc/Core/lheap.cpp b/uppsrc/Core/lheap.cpp
index bb3762681..be5349114 100644
--- a/uppsrc/Core/lheap.cpp
+++ b/uppsrc/Core/lheap.cpp
@@ -173,7 +173,7 @@ void *Heap::LAlloc(size_t& size)
 		Header *b = (Header *)((byte *)h + BIGHDRSZ - sizeof(Header));
 		b->size = 0; // header contains large header with size = 0, to detect big during free
 		b->free = false;
-		LLOG("Big alloc " << (void *)b->GetBlock());
+		LLOG("Big alloc " << size << ": " << (void *)b->GetBlock());
 		return b->GetBlock();
 	}
 	int bini = SizeToBin((int)size); // get the bin
diff --git a/uppsrc/Core/xxHsh.cpp b/uppsrc/Core/xxHsh.cpp
index efadbba47..f0213a8aa 100644
--- a/uppsrc/Core/xxHsh.cpp
+++ b/uppsrc/Core/xxHsh.cpp
@@ -17,6 +17,7 @@ void xxHashStream::Reset(dword seed)
 
 void xxHashStream::Out(const void *data, dword size)
 {
+	RTIMING("xxh2");
 	XXH32_update((XXH32_state_t *)context, data, size);
 }
 
diff --git a/uppsrc/plugin/lz4/Compress.cpp b/uppsrc/plugin/lz4/Compress.cpp
index 502c6282e..85a5bb178 100644
--- a/uppsrc/plugin/lz4/Compress.cpp
+++ b/uppsrc/plugin/lz4/Compress.cpp
@@ -1,5 +1,7 @@
 #include "lz4.h"
 
+#ifdef flagCOMPLEXLZ4
+
 #define LLOG(x) // LOG(x)
 
 namespace Upp {
@@ -18,7 +20,6 @@ void LZ4CompressStream::Init()
 
 void LZ4CompressStream::FinishBlock(char *outbuf, int clen, const char *origdata, int origsize)
 {
-	RTIMING("FinishBlock");
 	if(IsError() || out && out->IsError())
 		return;
 	if(clen < 0) {
@@ -162,3 +163,5 @@ LZ4CompressStream::~LZ4CompressStream()
 }
 
 };
+
+#endif
\ No newline at end of file
diff --git a/uppsrc/plugin/lz4/Compress2.cpp b/uppsrc/plugin/lz4/Compress2.cpp
new file mode 100644
index 000000000..99ccb2531
--- /dev/null
+++ b/uppsrc/plugin/lz4/Compress2.cpp
@@ -0,0 +1,160 @@
+#include "lz4.h"
+
+#ifndef flagCOMPLEXLZ4
+
+#define LLOG(x) // LOG(x)
+
+namespace Upp {
+
+void LZ4CompressStream::Open(Stream& out_)
+{
+	out = &out_;
+	ClearError();
+	pos = 0;
+	xxh.Reset();
+	Alloc();
+	pos = 0;
+	byte h[7];
+	Poke32le(h, LZ4F_MAGIC);
+	h[4] = LZ4F_VERSION | LZ4F_BLOCKINDEPENDENCE | LZ4F_CONTENTCHECKSUM;
+	h[5] = LZ4F_MAXSIZE_1024KB;
+	h[6] = xxHash(h + 4, 2) >> 8;
+	out->Put(h, 7);
+}
+
+void LZ4CompressStream::Alloc()
+{
+	int N = 16;
+	int sz = concurrent ? N * BLOCK_BYTES : BLOCK_BYTES;
+	buffer.Alloc(sz);
+	outbuf.Alloc(N * LZ4_compressBound(BLOCK_BYTES));
+	outsz.Alloc(N);
+	wrlim = ~buffer + sz;
+	ptr = ~buffer;
+}
+
+void LZ4CompressStream::Concurrent(bool b)
+{
+	FlushOut();
+	concurrent = b;
+	Alloc();
+}
+
+void LZ4CompressStream::FlushOut()
+{
+	if(ptr == (byte *)~buffer)
+		return;
+	
+	CoWork co;
+	
+	int osz = LZ4_compressBound(BLOCK_BYTES);
+	byte *t = ~outbuf;
+	int   ii = 0;
+	for(byte *s = ~buffer; s < ptr; s += BLOCK_BYTES) {
+		int origsize = min((int)BLOCK_BYTES, int(ptr - s));
+		if(concurrent)
+			co & [=] {
+				outsz[ii] = LZ4_compress_default((char *)s, (char *)t, origsize, osz);
+			};
+		else
+			outsz[ii] = LZ4_compress_default((char *)s, (char *)t, origsize, osz);
+		ii++;
+		t += osz;
+	}
+	
+	if(concurrent)
+		co.Finish();
+	
+	byte *s = ~buffer;
+	t = ~outbuf;
+	for(int i = 0; i < ii; i++) {
+		int origsize = min((int)BLOCK_BYTES, int(ptr - s));
+		int clen = outsz[i];
+		if(clen < 0) {
+			SetError();
+			return;
+		}
+		if(clen >= origsize || clen == 0) {
+			out->Put32le(0x80000000 | origsize);
+			out->Put(s, origsize);
+		}
+		else {
+			out->Put32le(clen);
+			out->Put(t, clen);
+		}
+		s += BLOCK_BYTES;
+		t += osz;
+	}
+	
+	int origsize = int(ptr - ~buffer);
+	xxh.Put(~buffer, origsize);
+	pos += origsize;
+	WhenPos(pos);
+	ptr = ~buffer;
+}
+
+void LZ4CompressStream::Close()
+{
+	ASSERT(compress >= 0);
+	if(out) {
+		FlushOut();
+		out->Put32le(0);
+		out->Put32le(xxh.Finish());
+		out = NULL;
+	}
+}
+
+bool LZ4CompressStream::IsOpen() const
+{
+	return out && out->IsOpen();
+}
+
+void LZ4CompressStream::_Put(int w)
+{
+	FlushOut();
+	*ptr++ = w;
+}
+
+void LZ4CompressStream::_Put(const void *data, dword size)
+{
+	LLOG("Put " << size);
+
+	ASSERT(compress >= 0);
+	
+	const char *s = reinterpret_cast<const char *>(data);
+
+	while(size > 0) {
+		if(IsError() || out && out->IsError())
+			return;
+		dword n = dword(wrlim - ptr);
+		if(size >= n) {
+			memcpy(ptr, s, n);
+			ptr = wrlim;
+			FlushOut();
+			size -= n;
+			s += n;
+		}
+		else {
+			memcpy(ptr, s, size);
+			ptr += size;
+			break;
+		}
+	}
+}
+
+LZ4CompressStream::LZ4CompressStream()
+{
+#ifdef _MULTITHREADED
+	concurrent = false;
+#endif
+	out = NULL;
+}
+
+LZ4CompressStream::~LZ4CompressStream()
+{
+	Close();
+}
+
+};
+
+#endif
\ No newline at end of file
diff --git a/uppsrc/plugin/lz4/Decompress.cpp b/uppsrc/plugin/lz4/Decompress.cpp
index 39061449d..dd667465c 100644
--- a/uppsrc/plugin/lz4/Decompress.cpp
+++ b/uppsrc/plugin/lz4/Decompress.cpp
@@ -4,12 +4,17 @@
 
 namespace Upp {
 
+
 void LZ4DecompressStream::Init()
 {
+	for(int i = 0; i < 16; i++)
+		wb[i].Clear();
+	ii = 0;
+	count = 0;
+	dlen = 0;
 	pos = 0;
 	eof = false;
-	buffer.Clear();
-	ptr = rdlim = (byte *)~buffer;
+	ptr = rdlim = NULL;
 	xxh.Reset();
 	ClearError();
 }
@@ -58,45 +63,105 @@ bool LZ4DecompressStream::Open(Stream& in_)
 	return true;
 }
 
-String LZ4DecompressStream::Read(int& blksz)
+bool LZ4DecompressStream::Next()
 {
-	if(IsError() || in->IsError())
-		return Null;
-	blksz = in->Get32le();
-	if(blksz == 0) // This is EOF
-		return Null;
-	int len = blksz & 0x7fffffff;
-	if(len > maxblock) {
-		SetError();
-		return Null;
+	RTIMING("Next");
+	if(ii < count) {
+		pos += dlen;
+		ptr = (byte *)~wb[ii].d;
+		dlen = wb[ii].dlen;
+		rdlim = ptr + dlen;
+		ii++;
+		return true;
 	}
-	String data = in->GetAll(len);
-	if(IsNull(data)) {
-		SetError();
-		return Null;
-	}
-	if(lz4hdr & LZ4F_BLOCKCHECKSUM)
-		in->Get32le();
-	return data;
+	return false;
 }
 
-String LZ4DecompressStream::Fetch()
+
+void LZ4DecompressStream::Fetch()
 {
-	RTIMING("Fetch");
-	int blksz;
-	String data = Read(blksz);
-	if((blksz & 0x80000000) || IsNull(data))
-		return data;
-	StringBuffer b(maxblock);
-	int sz = LZ4_decompress_safe(~data, ~b, data.GetCount(), maxblock);
-	if(sz < 0) {
-		SetError();
-		return 0;
+	if(Next())
+		return;
+	if(eof)
+		return;
+#ifdef _MULTITHREADED
+	CoWork co;
+#endif
+	bool   error = false;
+	bool last = false;
+	ii = 0;
+	count = concurrent ? 16 : 1;
+	for(int i = 0; i < count; i++) {
+		Workblock& t = wb[i];
+		int blksz = in->Get32le();
+		if(blksz == 0) { // This is EOF
+			last = true;
+			count = i;
+			break;
+		}
+		t.clen = blksz & 0x7fffffff;
+		if(t.clen > maxblock) {
+			SetError();
+			return;
+		}
+		if(!t.c) {
+			RTIMING("Alloc");
+			t.c.Alloc(maxblock);
+			t.d.Alloc(maxblock);
+		}
+		if(blksz & 0x80000000) { // block is not compressed
+			t.dlen = t.clen;
+			if(!in->GetAll(~t.d, t.clen)) {
+				SetError();
+				return;
+			}
+		}
+		else {
+			{ RTIMING("GetAll");
+			if(!in->GetAll(~t.c, t.clen)) {
+				SetError();
+				return;
+			}
+			}
+#ifdef _MULTITHREADED
+			if(concurrent)
+				co & [=, &error] {
+					Workblock& t = wb[i];
+					t.dlen = LZ4_decompress_safe(~t.c, ~t.d, t.clen, maxblock);
+					CoWork::FinLock();
+					if(t.dlen < 0)
+						error = true;
+				};
+			else
+#endif
+			{
+				RTIMING("LZ4 decompress");
+				t.dlen = LZ4_decompress_safe(~t.c, ~t.d, t.clen, maxblock);
+				if(t.dlen < 0)
+					error = true;
+			}
+		}
+		if(lz4hdr & LZ4F_BLOCKCHECKSUM)
+			in->Get32le(); // just skip it
+	}
+#ifdef _MULTITHREADED
+	if(concurrent)
+		co.Finish();
+#endif
+	if(error)
+		SetError();
+	else {
+		for(int i = 0; i < count; i++) {
+			RTIMING("xxh");
+			xxh.Put(wb[i].d, wb[i].dlen);
+		}
+		if(last) {
+			if(in->Get32le() != xxh.Finish())
+				SetError();
+			eof = true;
+		}
+		Next();
 	}
-	if(sz <= 0)
-		return Null;
-	b.SetLength(sz);
-	return b;
 }
 
 bool LZ4DecompressStream::IsOpen() const
@@ -104,33 +169,11 @@ bool LZ4DecompressStream::IsOpen() const
 	return in->IsOpen() && !IsError();
 }
 
-void LZ4DecompressStream::CheckEof()
-{
-	if(!eof) {
-		if(in->Get32le() != xxh.Finish())
-			SetError();
-		eof = true;
-	}
-}
-
-void LZ4DecompressStream::NewBuffer(const String& s)
-{
-	RTIMING("NewBuffer");
-	pos += buffer.GetCount();
-	buffer = s;
-	ptr = (byte *)buffer.begin();
-	rdlim = (byte *)buffer.end();
-	{ RTIMING("XXH");
-	xxh.Put(s, s.GetCount()); }
-	if(ptr == rdlim)
-		CheckEof();
-}
-
 int LZ4DecompressStream::_Term()
 {
 	if(eof)
 		return -1;
-	NewBuffer(Fetch());
+	Fetch();
 	return ptr == rdlim ? -1 : *ptr;
 }
 
@@ -138,34 +181,32 @@ int LZ4DecompressStream::_Get()
 {
 	if(eof)
 		return -1;
-	NewBuffer(Fetch());
+	Fetch();
 	return ptr == rdlim ? -1 : *ptr++;
 }
 
-int64 copied;
-EXITBLOCK { RDUMP(copied); }
-
 dword LZ4DecompressStream::_Get(void *data, dword size)
 {
 	RTIMING("_Get");
 	byte *t = (byte *)data;
 	while(size) {
-		if(IsError() || in->IsError() || IsEof())
+		if(IsError() || in->IsError() || ptr == rdlim && ii == count && eof)
 			break;
 		dword n = dword(rdlim - ptr);
 		if(size < n) {
-			{ RTIMING("memcpy1");
-			memcpy(t, ptr, size); }
+			RTIMING("memcpy1");
+			memcpy(t, ptr, size);
 			t += size;
 			ptr += size;
 			break;
 		}
 		else {
-			{ RTIMING("memcpy2"); copied += n;
+			{ RTIMING("memcpy2");
 			memcpy(t, ptr, n); }
 			t += n;
 			size -= n;
-			NewBuffer(Fetch());
+			ptr = rdlim;
+			Fetch();
 		}
 	}
 	
@@ -175,6 +216,7 @@ dword LZ4DecompressStream::_Get(void *data, dword size)
 LZ4DecompressStream::LZ4DecompressStream()
 {
 	in = NULL;
+	concurrent = false;
 }
 
 LZ4DecompressStream::~LZ4DecompressStream()
diff --git a/uppsrc/plugin/lz4/lz4.h b/uppsrc/plugin/lz4/lz4.h
index 267bb1d27..42c9c79c5 100644
--- a/uppsrc/plugin/lz4/lz4.h
+++ b/uppsrc/plugin/lz4/lz4.h
@@ -84,6 +84,7 @@ public:
 	~Lz4();
 };
 
+#ifdef flagCOMPLEXLZ4
 class LZ4CompressStream : public Stream  {
 public:
 	virtual   void  Close();
@@ -113,7 +114,7 @@ protected:
 	int               inblock;
 #endif
     
-	void          Init();
+    void          Init();
 	void          SetupBuffer();
 	void          FinishBlock(char *outbuf, int clen, const char *origdata, int origsize);
 	void          FlushOut();
@@ -130,6 +131,47 @@ public:
 	LZ4CompressStream(Stream& out) : LZ4CompressStream() { Open(out); }
 	~LZ4CompressStream();
 };
+#else
+class LZ4CompressStream : public Stream  {
+public:
+	virtual   void  Close();
+	virtual   bool  IsOpen() const;
+
+protected:
+	virtual   void  _Put(int w);
+	virtual   void  _Put(const void *data, dword size);
+	
+	Stream      *out;
+	
+	Buffer<byte> buffer;
+	Buffer<byte> outbuf;
+	Buffer<int>  outsz;
+
+	enum { BLOCK_BYTES = 1024 * 1024 };
+	
+	xxHashStream xxh;
+
+#ifdef _MULTITHREADED
+	bool         concurrent;
+#endif
+    
+    void          Alloc();
+	void          Init();
+	void          FlushOut();
+
+public:
+	Event<int64>                 WhenPos;
+
+#ifdef _MULTITHREADED
+	void Concurrent(bool b = true);
+#endif
+	void Open(Stream& out_);
+
+	LZ4CompressStream();
+	LZ4CompressStream(Stream& out) : LZ4CompressStream() { Open(out); }
+	~LZ4CompressStream();
+};
+#endif
 
 class LZ4DecompressStream : public Stream {
 public:
@@ -142,8 +184,17 @@ protected:
 
 private:
 	Stream        *in;
-	String         buffer;
-	Vector<String> ahead;
+	struct Workblock {
+		Buffer<char> c, d; // compressed, decompressed data
+		int   clen = 0, dlen = 0; // compressed, decompressed len
+		
+		bool Decompress();
+		void Clear() { c.Clear(); d.Clear(); }
+	};
+	Workblock wb[16];
+	int       count; // count of workblocks fetched
+	int       ii; // next workblock to be read
+	int       dlen; // length of current workblock
 	
 	enum { BLOCK_BYTES = 1024*1024 };
 	
@@ -152,14 +203,14 @@ private:
 	int          blockchksumsz;
 	byte         lz4hdr;
 	bool         eof;
+	
+	bool         concurrent;
 
     void          TryHeader();
 
 	void          Init();
-	String        Read(int& blksz);
-	String        Fetch();
-	void          CheckEof();
-	void          NewBuffer(const String& s);
+	bool          Next();
+	void          Fetch();
 
 public:	
 	Callback2<const void *, int> WhenOut;
@@ -167,7 +218,7 @@ public:
 	bool Open(Stream& in);
 
 #ifdef _MULTITHREADED
-	void Concurrent(bool b = true)           { co = b; }
+	void Concurrent(bool b = true)           { concurrent = b; }
 #endif
 
 	LZ4DecompressStream();
diff --git a/uppsrc/plugin/lz4/lz4.upp b/uppsrc/plugin/lz4/lz4.upp
index 4dbcfad90..66afcd908 100644
--- a/uppsrc/plugin/lz4/lz4.upp
+++ b/uppsrc/plugin/lz4/lz4.upp
@@ -7,6 +7,7 @@ file
 	lz4.h,
 	lz4upp.cpp,
 	Compress.cpp,
+	Compress2.cpp,
 	Decompress.cpp,
 	util.cpp,
 	lib\LICENSE,
diff --git a/uppsrc/plugin/lz4/util.cpp b/uppsrc/plugin/lz4/util.cpp
index b59631aa2..f7c332deb 100644
--- a/uppsrc/plugin/lz4/util.cpp
+++ b/uppsrc/plugin/lz4/util.cpp
@@ -4,10 +4,11 @@ namespace Upp {
 	
 static void sCopy(Stream& out, Stream& in, Gate2<int64, int64> progress)
 {
+	const int CHUNK = 16384;
+	Buffer<byte> b(CHUNK);
 	while(!in.IsEof()) { // TODO: progress!!!
-		String h;
-		h = in.Get(4 * 1024*1024);
-		out.Put(h);
+		int n = in.Get(b, CHUNK);
+		out.Put(b, n);
 	}
 }