found := false
	for range sz {
		var foundKey, foundVal []byte
		var err error
		foundKey, buf, err = msgp.ReadMapKeyZC(buf)
		if err != nil {
			break
		}
		foundVal, buf, err = msgp.ReadBytesZC(buf)
		if err != nil {
			break
		}
		plSize += len(foundVal) + msgp.StringPrefixSize + msgp.ArrayHeaderSize
		vals = append(vals, foundVal)
		if string(foundKey) != oldKey {
			keys = append(keys, foundKey)