Measure elapsed time in C++

chrono_elapsed.cpp

#include <chrono>
#include <iostream>

    auto start = std::chrono::high_resolution_clock::now();
    // do something
    auto end = std::chrono::high_resolution_clock::now();
    std::cout << std::chrono::duration_cast<std::chrono::microseconds>(end - start).count() << std::endl;