// mspNewReader returns a *Reader that reads from the provided reader.
// The reader will be buffered.
// Return with readMsgpReaderPoolPut when done.
func msgpNewReader(r io.Reader) *msgp.Reader {
	p := readMsgpReaderPool.Get().(*msgp.Reader)
	if p.R == nil {
		p.R = xbufio.NewReaderSize(r, 4<<10)
	} else {
		p.R.Reset(r)
	}
	return p
}

	case err != nil:
		logger.LogIf(ctx, fmt.Errorf("tier-journal: failed open read-only journal for processing %s", err))
		return
	}
	defer ro.Close()
	mr := msgpNewReader(ro)
	defer readMsgpReaderPoolPut(mr)

	done := false
	for {
		var entry jentry
		err := entry.DecodeMsg(mr)
		if errors.Is(err, io.EOF) {
			done = true
			break
		}
		if err != nil {

	totalVersions, err := strconv.Atoi(r.Form.Get(storageRESTTotalVersions))
	if err != nil {
		s.writeErrorResponse(w, err)
		return
	}

	versions := make([]FileInfoVersions, totalVersions)
	decoder := msgpNewReader(r.Body)
	defer readMsgpReaderPoolPut(decoder)
	for i := 0; i < totalVersions; i++ {
		dst := &versions[i]
		if err := dst.DecodeMsg(decoder); err != nil {
			s.writeErrorResponse(w, err)
			return
		}

// newMetacacheReader creates a new cache reader.
// Nothing will be read from the stream yet.
func newMetacacheReader(r io.Reader) *metacacheReader {
	dec := s2DecPool.Get().(*s2.Reader)
	dec.Reset(r)
	mr := msgpNewReader(dec)
	return &metacacheReader{
		mr: mr,
		closer: func() {
			dec.Reset(nil)
			s2DecPool.Put(dec)
			readMsgpReaderPoolPut(mr)
		},
		creator: func() error {
			v, err := mr.ReadByte()