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  1. #include <vector>
  2. #include <string>
  3. #include <iostream>
  4. #include <iomanip>
  5. #include <list>
  6. #include <chrono>
  7. #include <algorithm>
  8.  
  9. using namespace std;
  10.  
  11. class muTimer
  12. {
  13.     using Clock = std::chrono::high_resolution_clock;
  14.     bool active = false;
  15.     Clock::duration   duration_;
  16.     Clock::time_point start_ = Clock::now(), stop_ = Clock::now();
  17.  
  18.     muTimer(const muTimer&)             = delete;
  19.     muTimer& operator=(const muTimer&)  = delete;
  20. public:
  21.     using ns       = std::chrono::nanoseconds;
  22.     using mks      = std::chrono::microseconds;
  23.     using ms       = std::chrono::milliseconds;
  24.     muTimer() { reset(); start(); }
  25.     ~muTimer() = default;
  26.     muTimer& reset()
  27.     {
  28.         duration_ = std::chrono::nanoseconds(0);
  29.         active    = false;
  30.         return *this;
  31.     }
  32.     muTimer& start()
  33.     {
  34.         if (!active)
  35.         {
  36.             start_ = Clock::now();
  37.             active = true;
  38.         }
  39.         return *this;
  40.     }
  41.     muTimer& stop()
  42.     {
  43.         if (active)
  44.         {
  45.             stop_      = Clock::now();
  46.             duration_ += stop_ - start_;
  47.             active     = false;
  48.         }
  49.         return *this;
  50.     }
  51.     template<typename T = mks>
  52.         unsigned long long duration()
  53.     {
  54.         return static_cast<unsigned long long>
  55.             (std::chrono::duration_cast<T>(stop_-start_).count());
  56.     }
  57. };
  58.  
  59.  
  60. list<int> L;
  61. vector<int> V;
  62.  
  63. int main(int argc, const char * argv[])
  64. {
  65.     for(int i = 0; i < 1000000; ++i)
  66.     {
  67.         int r = rand();
  68.         V.push_back(r);
  69.         L.push_back(r);
  70.     }
  71.     L.sort();
  72.     sort(V.begin(),V.end());
  73.  
  74.     {
  75.         muTimer mu;
  76.         long long int sum = 0;
  77.         for(int i: V) sum += i;
  78.         mu.stop();
  79.         cout << "Sum " << sum << " for " << mu.duration() << " mks\n";
  80.     }
  81.     {
  82.         muTimer mu;
  83.         long long int sum = 0;
  84.         for(int i: L) sum += i;
  85.         mu.stop();
  86.         cout << "Sum " << sum << " for " << mu.duration() << " mks\n";
  87.     }
  88.  
  89. }
  90.  
Success #stdin #stdout 0.57s 46392KB
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Standard input is empty
stdout
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Sum 1073756018481283 for 456 mks
Sum 1073756018481283 for 80300 mks
https://ideone.com/cg7H5J
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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