#include <iostream>
#include <string>
#include <sys/timeb.h>

/*!
  Test on empty() compare to size() == 0
*/
void test_str_empty()
{
  std::string s(20, 'a');
  struct timeb tb0, tb1, tb2;
  size_t i1 = std::string::npos/100;

  ::ftime(&tb0);  
  for (size_t i = 0; i < i1; ++ i) {
    if (s.size()) {
      ::rand();
    }
  }
  ::ftime(&tb1);
  for (size_t i = 0; i < i1; ++ i) {
    if (s.empty()) {
      ::rand();
    }
  }
  ::ftime(&tb2);

  time_t diff1 = (tb1.time - tb0.time)*1000 + (tb1.millitm - tb0.millitm);
  time_t diff2 = (tb2.time - tb1.time)*1000 + (tb2.millitm - tb1.millitm);
  double ratio = diff1/(double)diff2;
#ifdef NDEBUG
  std::cout << "Release - ";
#else
  std::cout << "Debug   - ";
#endif
  std::cout << "Time spend: if (s.size())/if (s.empty()) = " << diff1 << "/" << diff2 << "\t= " << ratio << std::endl;
}

int main()
{
  //test_str_it();
  test_str_empty();
  return 0;
}