'c++ Eigen::VectorXd initialized in a loop

I have a for loop in which i initialize randomly 3 eigen vectors like

for(int i=0; i<10000; i++){
  Eigen::VectorXd state(mysize), dstate(mysize),  tau(mysize);
  state.setRandom();
  tau.setRandom();

   double time = 0.0;
    dstate = dosomething(time, state, tau);

   }

Everything work quite well but the memory grows indefinitely. I know that using Eigen::VectorXd the memory is reserved on the heap but when I initialize again should by released, right?. I also tried to resize the vectors to zero at the end of the loop but nothing change the occupied memory grows. My question is, why this happen?

c++memory-leakseigen3


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