if cap(b) >= wantSz {
			return b
		}
		PutByteBuffer(b)
	}
	if wantSz <= maxBufferSize {
		b := *internal32KByteBuffer.Get().(*[]byte)
		if cap(b) >= wantSz {
			return b[:0]
		}
		internal32KByteBuffer.Put(&b)
	}
	return make([]byte, 0, wantSz)
}

// PutByteBuffer is for returning byte buffers.
var PutByteBuffer = func(b []byte) {
	if cap(b) >= biggerBufMin && cap(b) < biggerBufMax {

	if payload != nil {
		if sz := payload.Msgsize(); cap(msg.Payload) < sz {
			PutByteBuffer(msg.Payload)
			msg.Payload = GetByteBufferCap(sz)
		}
		var err error
		msg.Payload, err = payload.MarshalMsg(msg.Payload[:0])
		msg.Op = payload.Op()
		if err != nil {
			return err
		}
	}
	defer PutByteBuffer(msg.Payload)
	dst := GetByteBufferCap(msg.Msgsize())
	dst, err := msg.MarshalMsg(dst)

		req := h.NewRequest()
		_, err := req.UnmarshalMsg(payload)
		if err != nil {
			PutByteBuffer(payload)
			r := RemoteErr(err.Error())
			return nil, &r
		}
		resp, rerr := handle(req)
		h.recycleReq(req)

		if rerr != nil {
			PutByteBuffer(payload)
			return nil, rerr
		}
		payload, err = resp.MarshalMsg(payload[:0])
		if !h.sharedResp {
			h.PutResponse(resp)

	// Create n managers.
	for _, remote := range grid.Managers {
		// Register a single handler which echos the payload.
		errFatal(remote.RegisterSingleHandler(handlerTest, func(payload []byte) ([]byte, *RemoteErr) {
			defer PutByteBuffer(payload)
			return append(GetByteBuffer()[:0], payload...), nil
		}))
		errFatal(rpc.Register(remote, func(req *testRequest) (resp *testResponse, err *RemoteErr) {
			return &testResponse{
				OrgNum:    req.Num,

				if err := enc.Encode(tmpEvt); err != nil {
					bugLogIf(ctx, err, "event: Encode failed")
					continue
				}
				mergeCh <- append(grid.GetByteBuffer()[:0], buf.Bytes()...)
			case <-ctx.Done():
				grid.PutByteBuffer(buf.Bytes())
				return
			}
		}
	}()
	peers, _ := newPeerRestClients(globalEndpoints)
	err := globalHTTPListen.Subscribe(mask, localCh, ctx.Done(), func(ev event.Event) bool {

	if b == nil {
		return bytes, errors.New("Bytes: UnmarshalMsg on nil pointer")
	}
	if bytes, err := msgp.ReadNilBytes(bytes); err == nil {
		if *b != nil {
			PutByteBuffer(*b)
		}
		*b = nil
		return bytes, nil
	}
	val, bytes, err := msgp.ReadBytesZC(bytes)
	if err != nil {
		return bytes, err
	}
	if cap(*b) >= len(val) {
		*b = (*b)[:len(val)]

		if debugReqs {
			fmt.Println(m.MuxID, m.parent.String(), "CHECKSEQ FAIL", m.RecvSeq, seq)
		}
		PutByteBuffer(r.Msg)
		r.Msg = nil
		r.Err = ErrIncorrectSequence
		m.addResponse(r)
		return
	}
	atomic.StoreInt64(&m.LastPong, time.Now().Unix())
	ok := m.addResponse(r)
	if !ok {
		PutByteBuffer(r.Msg)
	}
}

var errStreamEOF = errors.New("stream EOF")

                    break
                }           
                // Do something with payload
                out <- []byte("response")

                // Return the request for reuse
                grid.PutByteBuffer(req)
            }
        }
        // out is closed by the caller and should never be closed by the handler.
        return nil
    }

		m.Payload = GetByteBuffer()[:0]
	}
	h, err := m.UnmarshalMsg(b)
	if err != nil {
		return nil, nil, fmt.Errorf("read write: %v", err)
	}
	if len(m.Payload) == 0 && m.Flags&FlagPayloadIsZero == 0 {
		PutByteBuffer(m.Payload)
		m.Payload = nil
	}
	if m.Flags&FlagCRCxxh3 != 0 {
		const hashLen = 4
		if len(h) < hashLen {
			return nil, nil, fmt.Errorf("want crc len 4, got %v", len(h))
		}

}

// Recycle will reuse the memory allocated for the FileInfo data.
func (r *RenameDataInlineHandlerParams) Recycle() {
	if r == nil {
		return
	}
	if cap(r.FI.Data) >= xioutil.SmallBlock {
		grid.PutByteBuffer(r.FI.Data)
		r.FI.Data = nil
	}
}

// RenameFileHandlerParams are parameters for RenameFileHandler.
type RenameFileHandlerParams struct {
	DiskID      string `msg:"id"`
	SrcVolume   string `msg:"sv"`