E3 splits, cap=128, N=1000000, random order, seed 3
height 3, leaves 11220, internal 129
level 0 splits    11219  per insert 0.011219
level 1 splits      127  per insert 0.000127
level 2 splits        0  per insert 0.000000
total splits 11346, per insert 0.011346, nodes-1 = 11348
Bayer-McCreight bound on split page writes per insert 2/k = 0.031250 (k=64)
inserts by number of nodes split:  0:988781  1:11092  2:127