Generic function timer - could be more fancy but it is good enough

main.cpp

// -First idea was to do it thanks to RAII. Problem is it requires a lot of brackets
// -Then i wanted to go full variadic generic template function, 
//   but i got stuck because i would have to pass a variadic function
//   to a function which doesn't make any sense, and was overkill 
// - This solution seems the best for now... Client code is okay-ish...

#include <iostream>
#include <chrono>
#include <thread>
#include <string>
#include <utility>
using namespace std;
using namespace std::chrono;


template <class F, class ... Args>
   auto genericTimer(F f, Args && ... args)
   {
      auto avant = system_clock::now();
      f(forward<Args>(args)...);
      auto apres = system_clock::now();
      return 0.001f * duration_cast<microseconds>(apres-avant).count();
   }

void foo(int, string){ std::this_thread::sleep_for(std::chrono::milliseconds(16));}

int main()
{
   auto res = genericTimer(foo, 42, "Scene");
   cout << "Function time : " << res << endl;
}