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38 lines
835 B
38 lines
835 B
// 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 REPEAT
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#define REPEAT 10000
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#endif
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#ifndef SCALAR
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#define SCALAR float
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#endif
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int main(int argc, char *argv[])
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{
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typedef Matrix<SCALAR, Eigen::Dynamic, Eigen::Dynamic> Mat;
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Mat m(100, 100);
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m.setRandom();
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for(int a = 0; a < REPEAT; a++)
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{
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int r, c, nr, nc;
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r = Eigen::internal::random<int>(0,10);
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c = Eigen::internal::random<int>(0,10);
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nr = Eigen::internal::random<int>(50,80);
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nc = Eigen::internal::random<int>(50,80);
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m.block(r,c,nr,nc) += Mat::Ones(nr,nc);
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m.block(r,c,nr,nc) *= SCALAR(10);
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m.block(r,c,nr,nc) -= Mat::constant(nr,nc,10);
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m.block(r,c,nr,nc) /= SCALAR(10);
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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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