bench/benchmark.cpp


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// g++ -O3 -DNDEBUG -DMATSIZE=<x> benchmark.cpp -o benchmark && time ./benchmark
#include <cstdlib>
#include <cmath>
#include <Eigen/Core>

#ifndef MATSIZE
#define MATSIZE 3
#endif

using namespace std;
USING_PART_OF_NAMESPACE_EIGEN

int main(int argc, char *argv[])
{
    Matrix<double,MATSIZE,MATSIZE> I;
    Matrix<double,MATSIZE,MATSIZE> m;
    for(int i = 0; i < MATSIZE; i++)
        for(int j = 0; j < MATSIZE; j++)
        {
            I(i,j) = (i==j);
            m(i,j) = (i+MATSIZE*j);
        }
    asm("#begin");
    for(int a = 0; a < 40000000; a++)
    {
        m = I + 0.00005 * (m + m*m);
    }
    asm("#end");
    cout << m << endl;
    return 0;
}