xref: /aosp_15_r20/external/eigen/bench/bench_sum.cpp (revision bf2c37156dfe67e5dfebd6d394bad8b2ab5804d4) 
1*bf2c3715SXin Li #include <iostream>
2*bf2c3715SXin Li #include <Eigen/Core>
3*bf2c3715SXin Li using namespace Eigen;
4*bf2c3715SXin Li using namespace std;
5*bf2c3715SXin Li 
main()6*bf2c3715SXin Li int main()
7*bf2c3715SXin Li {
8*bf2c3715SXin Li   typedef Matrix<SCALAR,Eigen::Dynamic,1> Vec;
9*bf2c3715SXin Li   Vec v(SIZE);
10*bf2c3715SXin Li   v.setZero();
11*bf2c3715SXin Li   v[0] = 1;
12*bf2c3715SXin Li   v[1] = 2;
13*bf2c3715SXin Li   for(int i = 0; i < 1000000; i++)
14*bf2c3715SXin Li   {
15*bf2c3715SXin Li     v.coeffRef(0) += v.sum() * SCALAR(1e-20);
16*bf2c3715SXin Li   }
17*bf2c3715SXin Li   cout << v.sum() << endl;
18*bf2c3715SXin Li }
19