optimize(orbyte): use manual destroy

gold/head/box.go

@@ -47,6 +47,7 @@ func (p *Packet) PreCRC64() (crc uint64) {
 			)
 		}
 	})
+	w.Destroy()
 	return
 }
 
@@ -58,11 +59,13 @@ func (p *Packet) WriteHeaderTo(buf *bytes.Buffer) {
 		buf.Write((*[PacketHeadNoCRCLen]byte)(
 			(unsafe.Pointer)(p),
 		)[:])
-		pbuf.NewBytes(buf.Len()).V(func(b []byte) {
+		b := pbuf.NewBytes(buf.Len())
+		b.V(func(b []byte) {
 			copy(b, buf.Bytes())
 			ClearTTL(b)
 			p.md5h8 = algo.MD5Hash8(b)
 		})
+		b.ManualDestroy()
 		_ = binary.Write(buf, binary.LittleEndian, p.md5h8)
 		return
 	}
@@ -76,14 +79,17 @@ func (p *Packet) WriteHeaderTo(buf *bytes.Buffer) {
 	w.Write(p.src[:])
 	w.Write(p.dst[:])
 	w.P(func(buf *pbuf.Buffer) {
-		pbuf.NewBytes(buf.Len()).V(func(b []byte) {
+		b := pbuf.NewBytes(buf.Len())
+		b.V(func(b []byte) {
 			copy(b, buf.Bytes())
 			ClearTTL(b)
 			p.md5h8 = algo.MD5Hash8(b)
 		})
+		b.ManualDestroy()
 	})
 	w.WriteUInt64(p.md5h8)
 	w.P(func(b *pbuf.Buffer) {
 		_, _ = buf.ReadFrom(b)
 	})
+	w.Destroy()
 }

gold/head/builder.go

@@ -91,6 +91,7 @@ func (pb *DataBuilder) Zstd() *DataBuilder {
 		if config.ShowDebugLog {
 			logrus.Debugln(file.Header(), strconv.FormatUint(ub.DAT.md5h8, 16), "data after zstd", file.ToLimitHexString(ub.Bytes(), 64))
 		}
+		data.ManualDestroy()
 	})
 }
 
@@ -125,7 +126,9 @@ func (pb *DataBuilder) Seal(aead cipher.AEAD, teatyp uint8, additional uint16) *
 				data := algo.EncodeAEAD(aead, additional, b.Bytes())
 				ub.Reset()
 				data.V(func(b []byte) { ub.Write(b) })
+				data.ManualDestroy()
 			})
+			w.Destroy()
 		}))
 }
 
@@ -139,6 +142,7 @@ func (pb *DataBuilder) Plain(teatyp uint8, additional uint16) *PacketBuilder {
 				ub.Reset()
 				_, _ = ub.ReadFrom(b)
 			})
+			w.Destroy()
 		}))
 }
 
@@ -228,6 +232,11 @@ func (pb *PacketBuilder) Split(mtu int, nofrag bool) (pbs []PacketBytes) {
 	return
 }
 
+// Destroy call this once no one use it.
+func (pb *PacketBuilder) Destroy() {
+	(*PacketItem)(pb).ManualDestroy()
+}
+
 func BuildPacketFromBytes(pb PacketBytes) pbuf.Bytes {
 	w := bin.SelectWriter()
 	pb.B(func(_ []byte, p *Packet) {

gold/head/unbox.go

@@ -55,11 +55,13 @@ func ParsePacketHeader(data []byte) (pbytes PacketBytes, err error) {
 			return
 		}
 		var crc uint64
-		pbuf.NewBytes(int(PacketHeadNoCRCLen)).V(func(b []byte) {
+		b := pbuf.NewBytes(int(PacketHeadNoCRCLen))
+		b.V(func(b []byte) {
 			copy(b, data[:PacketHeadNoCRCLen])
 			ClearTTL(b)
 			crc = algo.MD5Hash8(b)
 		})
+		b.ManualDestroy()
 		if crc != pb.DAT.md5h8 {
 			err = ErrBadCRCChecksum
 			if config.ShowDebugLog {
@@ -80,6 +82,7 @@ func ParsePacketHeader(data []byte) (pbytes PacketBytes, err error) {
 		pb.DAT.hashrem = int64(sz)
 	})
 	if err != nil {
+		p.ManualDestroy()
 		return
 	}
 	pbytes = pbuf.BufferItemToBytes(p)