| // 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; | |
| } |