#include <iostream>
#include <chrono>
using namespace std;
using namespace std::chrono;

size_t foo = 0;

template<int from, int to> struct Loop {
  inline void operator()() { ++foo; Loop<from+1, to>()(); }
};
template<int to> struct Loop<to, to> { void operator()() {} };

struct Incrementer { void operator()() { ++foo; } };

int main()
{
  auto start = high_resolution_clock::now();
  Loop<0, 10000>()();
  auto stop = high_resolution_clock::now();
  size_t duration1 = duration_cast<microseconds>(stop-start).count();

  start = high_resolution_clock::now();
  for(int from=0, to=10000; from < to; ++from) { Incrementer()(); }
  stop = high_resolution_clock::now();
  size_t duration2 = duration_cast<microseconds>(stop-start).count();

  cout << "templated: " << duration1 << ", for: " << duration2 << ", foo: " << foo << endl;
}