mirror of
https://gitlab.com/libeigen/eigen.git
synced 2025-03-01 18:26:24 +08:00
e092cbc75c
-use row-major traversal when the number of columns is fixed and the number of rows is dynamic -other minor changes
24 lines
429 B
C++
24 lines
429 B
C++
// g++ -O3 -DNDEBUG benchmark.cpp -o benchmark && time ./benchmark
|
|
|
|
#include <Eigen/Core>
|
|
|
|
using namespace std;
|
|
USING_PART_OF_NAMESPACE_EIGEN
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
Matrix3d I;
|
|
Matrix3d m;
|
|
for(int i = 0; i < 3; i++) for(int j = 0; j < 3; j++)
|
|
{
|
|
I(i,j) = (i==j);
|
|
m(i,j) = (i+3*j);
|
|
}
|
|
for(int a = 0; a < 400000000; a++)
|
|
{
|
|
m = Matrix3d::identity() + 0.00005 * (m + m*m);
|
|
}
|
|
cout << m << endl;
|
|
return 0;
|
|
}
|