Found the following significant warnings:

  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.points' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.points' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.points' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.points' is deprecated.
  Warning: 'rgl.lines' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
  Warning: 'rgl.triangles' is deprecated.
  Warning: 'rgl.viewpoint' is deprecated.
Deprecated functions may be defunct as soon as of the next release of
R.
See ?Deprecated.
Examples with CPU (user + system) or elapsed time > 5s
            user system elapsed
smooth.FEM 3.895  0.371   5.657