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89a134ba0b
dimension. The advantage is that evaluating a dynamic-sized block in a fixed-size matrix no longer causes a dynamic memory allocation. Other new thing: IntAtRunTimeIfDynamic allows storing an integer at zero cost if it is known at compile time.
24 lines
410 B
C++
24 lines
410 B
C++
// g++ -O3 -DNDEBUG benchmark.cpp -o benchmark && time ./benchmark
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#include <Eigen/Core>
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using namespace std;
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USING_PART_OF_NAMESPACE_EIGEN
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int main(int argc, char *argv[])
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{
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Matrix3d I;
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Matrix3d m;
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for(int i = 0; i < 3; i++) for(int j = 0; j < 3; j++)
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{
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I(i,j) = (i==j);
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m(i,j) = (i+3*j);
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}
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for(int a = 0; a < 400000000; a++)
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{
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m = I + 0.00005 * (m + m*m);
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}
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cout << m << endl;
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return 0;
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}
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