@ -27,7 +27,7 @@ class MultiFileReader : public framework::ReaderBase {
const std::vector<framework::DDim>& dims, size_t thread_num,
size_t buffer_size)
: buffer_size_(buffer_size) {
readers_.resize(file_names.size());
readers_.reserve(file_names.size());
for (const std::string& f_name : file_names) {
readers_.emplace_back(CreateReaderByFileName(f_name, dims));
}