| // g++ -O3 -DNDEBUG benchmarkX.cpp -o benchmarkX && time ./benchmarkX |
| |
| #include <iostream> |
| |
| #include <Eigen/Core> |
| |
| using namespace std; |
| using namespace Eigen; |
| |
| #ifndef REPEAT |
| #define REPEAT 10000 |
| #endif |
| |
| #ifndef SCALAR |
| #define SCALAR float |
| #endif |
| |
| int main(int argc, char *argv[]) { |
| typedef Matrix<SCALAR, Eigen::Dynamic, Eigen::Dynamic> Mat; |
| Mat m(100, 100); |
| m.setRandom(); |
| |
| for (int a = 0; a < REPEAT; a++) { |
| int r, c, nr, nc; |
| r = Eigen::internal::random<int>(0, 10); |
| c = Eigen::internal::random<int>(0, 10); |
| nr = Eigen::internal::random<int>(50, 80); |
| nc = Eigen::internal::random<int>(50, 80); |
| m.block(r, c, nr, nc) += Mat::Ones(nr, nc); |
| m.block(r, c, nr, nc) *= SCALAR(10); |
| m.block(r, c, nr, nc) -= Mat::constant(nr, nc, 10); |
| m.block(r, c, nr, nc) /= SCALAR(10); |
| } |
| cout << m[0] << endl; |
| return 0; |
| } |