Box radius: 1
  Elapsed time erosion VHGW (multi-threaded): 14.719s.
  Elapsed time contour iterative (multi-threaded): 0.688s.
  Elapsed time parabolic (single-threaded): 5.094s.
Box radius: 2
  Elapsed time erosion VHGW (multi-threaded): 19.235s.
  Elapsed time contour iterative (multi-threaded): 1.297s.
  Elapsed time parabolic (single-threaded): 5.094s.
Box radius: 4
  Elapsed time erosion VHGW (multi-threaded): 14.968s.
  Elapsed time contour iterative (multi-threaded): 2.61s.
  Elapsed time parabolic (single-threaded): 5.141s.
Box radius: 8
  Elapsed time erosion VHGW (multi-threaded): 36.89s.
  Elapsed time contour iterative (multi-threaded): 5.125s.
  Elapsed time parabolic (single-threaded): 5.188s.
Box radius: 16
  Elapsed time erosion VHGW (multi-threaded): 20.328s.
  Elapsed time contour iterative (multi-threaded): 10.188s.
  Elapsed time parabolic (single-threaded): 5.312s.
Box radius: 32
  Elapsed time erosion VHGW (multi-threaded): 30.391s.
  Elapsed time contour iterative (multi-threaded): 19.953s.
  Elapsed time parabolic (single-threaded): 5.765s.