Timer to measure performance in c++

Timer in cpp

#include <iostream>
#include <chrono>

class Timer
{
public:
    Timer() {
        startTimePoint = std::chrono::high_resolution_clock::now();
    }
    ~Timer() {
        auto endTimePoint = std::chrono::high_resolution_clock::now();
        // change below from nano to milliseconds or microseconds if needed
        auto start = std::chrono::time_point_cast<std::chrono::nanoseconds>(startTimePoint).time_since_epoch().count();
        auto end = std::chrono::time_point_cast<std::chrono::nanoseconds>(endTimePoint).time_since_epoch().count();
        auto duration = end - start;
        
        std::cout << "duration :: " << duration << std::endl;
    }
private:
    std::chrono::time_point<std::chrono::high_resolution_clock> startTimePoint;
};