thread_count.cc

const auto processor_count = std::thread::hardware_concurrency();
int minimum_count = 1, minimum_timecost = 0;
    for (int i = 0; i < processor_count; i++) 
    {
        printf("Thread count: %d. ", i + 1);
        int timecost = barcode_decoding(buffer, size, formats, i, license, config);
        if (i == 0) 
        {
            minimum_count = 1; 
            if (timecost > 0)
            {
                minimum_timecost = timecost; 
            }
        }
        else {
            if (timecost < minimum_timecost)
            {
                minimum_count = i + 1;
                minimum_timecost = timecost; 
            }
        }
    }
    printf("Multi-thread best performance: thread_count = %d, timecost = %d \n\n", minimum_count, minimum_timecost);