title: Huge sparse matrix - vector multiplication
body: <p>I'm looking for a library to do huge Sparse Matrix x Vector multiplication.
  The matrix itself will almost fill the RAM.</p>
  
  <p>I've found Eigen3, OSKI and some basic Sparse BLAS implementations.</p>
  
  <p>Are there other options? 
  How can I choose between them ?</p>
  
  <p>Edit: There is also Intel's MKL</p>