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| // 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;
| }
|
|
