 The dominant cost is in the solutions of linear least squares problems that arise from quadrature points, and they can be readily parallelized in practice.
<clarity>  The dominant cost is in the solutions of linear least squares problems that arise from quadrature points, and they can be readily parallelized in practice.
 The primary cost is in the solutions of linear least squares problems that arise from quadrature points, and they can be readily parallelized in practice.