35 lines
605 B
C++
35 lines
605 B
C++
// g++ -O3 -DNDEBUG benchmarkX.cpp -o benchmarkX && time ./benchmarkX
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#include <iostream>
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#include <Eigen/Core>
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using namespace std;
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using namespace Eigen;
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#ifndef VECTYPE
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#define VECTYPE VectorXLd
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#endif
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#ifndef VECSIZE
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#define VECSIZE 1000000
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#endif
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#ifndef REPEAT
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#define REPEAT 1000
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#endif
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int main(int argc, char *argv[])
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{
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VECTYPE I = VECTYPE::Ones(VECSIZE);
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VECTYPE m(VECSIZE,1);
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for(int i = 0; i < VECSIZE; i++)
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{
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m[i] = 0.1 * i/VECSIZE;
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}
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for(int a = 0; a < REPEAT; a++)
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{
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m = VECTYPE::Ones(VECSIZE) + 0.00005 * (m.cwise().square() + m/4);
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}
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cout << m[0] << endl;
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return 0;
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}
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