#include <chrono>
 #include <iostream>

 constexpr auto tenMill = 10000000;

 class MySingleton{
 public:
   static MySingleton& getInstance(){
     static MySingleton instance;
     return instance;
   }
 private:
   MySingleton() = default;
   ~MySingleton() = default;
   MySingleton(const MySingleton&) = delete;
   MySingleton& operator=(const MySingleton&) = delete;

 };

 int main(){

   auto begin = std::chrono::steady_clock:: now();
   for (size_t i = 0; i <= tenMill; ++i){
     MySingleton::getInstance();
   }
   std::chrono::duration<double> res= std::chrono::steady_clock::now() - begin;

   std::cout << res.count() << std::endl;

 }