Batch #1
  Domain 1000x1000
  Vary IPFS 5, 10, ... 75
  Holding DIM=2 Pieces=3500
  Unif/Grid size 100 - so 100 uniform pieces

  - Seems that V3 is faster than V4 - why? Perhaps the grid size is too small st.
    calculating upper bounds is not worth it?
  - Perhaps batch 2 should have Grid size 50, so 400 uniform pieces?