Testing boost::chrono

test_process_cpu_clock.cpp

#include <boost/chrono.hpp>
#include <chrono>
#include <thread>
#include <iostream>
#include "/space/code/sufex/src/util/proctime.hpp"

int main()
{
  typedef boost::chrono::process_user_cpu_clock         CPUClock;

  auto boost_tp1  = CPUClock::now();
  auto user_tp1   = rlxutil::cpu_clock::now();
  unsigned long step1 = 1;
  unsigned long step2 = 1;
  for (int i = 0 ; i < 10000000 ; ++i) {
    unsigned long step3 = step1 + step2;
    std::swap(step1,step2);
    std::swap(step2,step3);
  }
  std::cout << "Arithmetic result: " << step2 << std::endl;
  auto boost_tp2  = CPUClock::now();
  auto user_tp2   = rlxutil::cpu_clock::now();

  std::cout << "CPU time (Boost)  "
      << boost::chrono::duration_cast<boost::chrono::microseconds>(boost_tp2 - boost_tp1).count()
      << std::endl;

  std::cout << "CPU time (direct) "
      << std::chrono::duration_cast<std::chrono::microseconds>(user_tp2 - user_tp1).count()
      << std::endl;

  return 0;
}