#SUBINTERVALS IMAGES _TIME
          200      1 0.075
          200      2 0.302
          200      3 0.837
          200      5 1.958
          200      8 3.223
        20000      1 0.073
        20000      2 0.231
        20000      3 0.902
        20000      5 2.016
        20000      8 3.313
      2000000      1 0.464
      2000000      2 0.738
      2000000      3 1.315
      2000000      5 2.252
      2000000      8 3.321
     20000000      1 4.059
     20000000      2 3.777
     20000000      3 4.527
     20000000      5 5.042
     20000000      8 5.740
    200000000      1 39.707
    200000000      2 33.461
    200000000      3 34.740
    200000000      5 31.726
    200000000      8 28.450