1// g++ -fopenmp -I .. -O3 -DNDEBUG -finline-limit=1000 benchmarkX.cpp -o b && time ./b 2 3#include <iostream> 4 5#include <Eigen/Core> 6 7using namespace std; 8using namespace Eigen; 9 10#ifndef MATTYPE 11#define MATTYPE MatrixXLd 12#endif 13 14#ifndef MATSIZE 15#define MATSIZE 400 16#endif 17 18#ifndef REPEAT 19#define REPEAT 100 20#endif 21 22int main(int argc, char *argv[]) 23{ 24 MATTYPE I = MATTYPE::Ones(MATSIZE,MATSIZE); 25 MATTYPE m(MATSIZE,MATSIZE); 26 for(int i = 0; i < MATSIZE; i++) for(int j = 0; j < MATSIZE; j++) 27 { 28 m(i,j) = (i+j+1)/(MATSIZE*MATSIZE); 29 } 30 for(int a = 0; a < REPEAT; a++) 31 { 32 m = I + 0.0001 * (m + m*m); 33 } 34 cout << m(0,0) << endl; 35 return 0; 36} 37