c++ hash speed of program

gistfile1.cpp

class Benchmark
{
private:
    bool started = false;
    bool benched = false;
    float functionCalls = 0;
    std::chrono::high_resolution_clock::time_point startHash;
    std::chrono::high_resolution_clock::time_point startBenchmark;
public:
    void
    incrementHashCount()
    {
        if (!this->started)
        {
            this->started = true;
            this->startHash = std::chrono::high_resolution_clock::now();
        }
        this->functionCalls++;
        if (this->functionCalls == 1000000)
        {
            this->functionCalls = 0;
            std::chrono::high_resolution_clock::time_point endHash = std::chrono::high_resolution_clock::now();
            double timeFor1MCalls = std::chrono::duration_cast<std::chrono::milliseconds>(endHash - startHash).count();
            startHash = std::chrono::high_resolution_clock::now();
            long callsSecond = long((1000000 / (timeFor1MCalls / 1000)));
            std::cout << "Puissance de l'ensemble des threads : " << callsSecond / 1000 << "MH/s" << std::endl;
        }
    };
}

int
main(int argc, char **argv)
{
    auto *benchmark = new Benchmark();
    while (!signal(SIGINT, {}) && !done)
    {
        benchmark->incrementHashCount();
    }
    return 0;
}