Method getDuration

src/include/common/timer.h:25–31

    }

    double getDuration() const {
        if (finished) {
            auto duration = stopTime - startTime;
            return (double)std::chrono::duration_cast<std::chrono::microseconds>(duration).count();
        }
        throw Exception("Timer is still running.");
    }

    uint64_t getElapsedTimeInMS() const {
        auto now = std::chrono::high_resolution_clock::now();