| // g++ -O3 -DNDEBUG benchmarkX.cpp -o benchmarkX && time ./benchmarkX |
| |
| #include <iostream> |
| #include <Eigen/Core> |
| |
| using namespace std; |
| using namespace Eigen; |
| |
| #ifndef VECTYPE |
| #define VECTYPE VectorXLd |
| #endif |
| |
| #ifndef VECSIZE |
| #define VECSIZE 1000000 |
| #endif |
| |
| #ifndef REPEAT |
| #define REPEAT 1000 |
| #endif |
| |
| int main(int argc, char *argv[]) |
| { |
| VECTYPE I = VECTYPE::Ones(VECSIZE); |
| VECTYPE m(VECSIZE,1); |
| for(int i = 0; i < VECSIZE; i++) |
| { |
| m[i] = 0.1 * i/VECSIZE; |
| } |
| for(int a = 0; a < REPEAT; a++) |
| { |
| m = VECTYPE::Ones(VECSIZE) + 0.00005 * (m.cwise().square() + m/4); |
| } |
| cout << m[0] << endl; |
| return 0; |
| } |
