Created by: dancingpipi

fluid 1.4 代码如下：

int Classifier::predict(paddle::PaddleTensor &image_tensor, paddle::PaddleTensor &audio_tensor, std::vector<float> &output, const int index){
    int ret_code = 0;
    try {
        std::vector<paddle::PaddleTensor> tensor_feeds;
        std::vector<paddle::PaddleTensor> outputs;
        tensor_feeds.emplace_back(std::move(image_tensor));
        tensor_feeds.emplace_back(std::move(audio_tensor));

        auto predictor = _main_predictor->Clone();
        predictor->Run(tensor_feeds, &outputs, 1);

        const size_t num_elements = outputs.front().data.length() / sizeof(float);

        auto *output_data = static_cast<float *>(outputs.front().data.data());
        output.assign(output_data, output_data + num_elements);
    } catch (const std::exception &err){
        LOG(ERROR) << "error occur in predict : " << err.what();
        ret_code = -1;
    }
    return ret_code;
}

QPS特别低，请问下原因，我的使用姿势正确吗？