Function Test

speed/example/speed_program.cpp:21–45

double global_result = 0.0;

std::string Test(size_t size, size_t repeat)
{  // setup
   double *a = new double[size];
   double *b = new double[size];
   size_t i  = size;;
   while(i)
   {  --i;
      a[i] = double(i);
      b[i] = double(2 * i);
   }
   // operations we are timing
   while(repeat--)
   {  i = size;;
      while(i)
      {  --i;
         global_result += a[i] * b[i];
      }
   }
   // teardown
   delete [] a;
   delete [] b;

   // return a test name that is valid for all sizes and repeats
   return "double: result = sum_i a[i] * b[i]";
}
int main(void)
{
   CppAD::SpeedTest(Test, 20, 20, 100);