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  1. #include <iostream>
  2. #include <chrono>
  3.  
  4. #define MAX_BUFFER 256
  5. const int whileLoops = 1024 * 1024 * 10;
  6.  
  7. void TracedFunction(int blockSize, int controlRate) {
  8.     std::chrono::high_resolution_clock::time_point pStart;
  9.     std::chrono::high_resolution_clock::time_point pEnd;
  10.  
  11.     double A[MAX_BUFFER];
  12.     double B[MAX_BUFFER];
  13.     double C[MAX_BUFFER];
  14.  
  15.     // same traced function
  16.     pStart = std::chrono::high_resolution_clock::now();
  17.  
  18.     int whileCounter = 0;
  19.     while (whileCounter < whileLoops) {
  20.         for (int sampleIndex = 0; sampleIndex < blockSize; sampleIndex++) {
  21.             double value = A[sampleIndex] + B[sampleIndex];
  22.  
  23.             C[sampleIndex] = value;
  24.         }
  25.  
  26.         whileCounter++;
  27.     }
  28.  
  29.     pEnd = std::chrono::high_resolution_clock::now();
  30.     std::cout << "execution time: " << std::chrono::duration_cast<std::chrono::milliseconds>(pEnd - pStart).count() << " ms" << " | fake result: " << A[19] << " " << B[90] << " " << C[129] << std::endl;
  31. }
  32.  
  33. class OptimizeProcess
  34. {
  35. public:
  36.     std::chrono::high_resolution_clock::time_point pStart;
  37.     std::chrono::high_resolution_clock::time_point pEnd;
  38.  
  39.     double A[MAX_BUFFER];
  40.     double B[MAX_BUFFER];
  41.     double C[MAX_BUFFER];
  42.  
  43.     OptimizeProcess() { }
  44.  
  45.     void TracedFunction(int blockSize, int controlRate) {
  46.         // same traced function
  47.         pStart = std::chrono::high_resolution_clock::now();
  48.  
  49.         int whileCounter = 0;
  50.         while (whileCounter < whileLoops) {
  51.             for (int sampleIndex = 0; sampleIndex < blockSize; sampleIndex++) {
  52.                 double value = A[sampleIndex] + B[sampleIndex];
  53.  
  54.                 C[sampleIndex] = value;
  55.             }
  56.  
  57.             whileCounter++;
  58.         }
  59.  
  60.         pEnd = std::chrono::high_resolution_clock::now();
  61.         std::cout << "execution time: " << std::chrono::duration_cast<std::chrono::milliseconds>(pEnd - pStart).count() << " ms" << " | fake result: " << A[19] << " " << B[90] << " " << C[129] << std::endl;
  62.     }
  63. };
  64.  
  65. int main() {
  66.     int blockSize = MAX_BUFFER;
  67.     int controlRate = 8;
  68.  
  69.     // outside class
  70.     TracedFunction(blockSize, controlRate);
  71.  
  72.     // within class
  73.     OptimizeProcess p1;
  74.     p1.TracedFunction(blockSize, controlRate);
  75.  
  76.     std::cout << std::endl;
  77.     system("pause");
  78.  
  79.     return 0;
  80. }
Success #stdin #stdout #stderr 2.89s 15240KB
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stdin
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Standard input is empty
stdout
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execution time: 1458 ms | fake result: 0 0 0
execution time: 1436 ms | fake result: 0 0 8.19596e-318
stderr
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sh: 1: pause: not found
https://ideone.com/uZK787
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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