Bird matters (i.e. the extremely slow Brep/Plane section component)

Well friends,

Appears to me that the Brep/Plane section component (but other relative components as well) is slow...I mean extremely slow. Play with the available options (rectilinear geometry and/or nurbs breps) and observe the quite hideous delays (~ 40 intersection events asked but you can change this obviously).

Is it a doc.tolerance thing? Can some method speed things a "bit"?

Best, Peter