0:  real 33.56 user 2.01 sys 17.48
1:  real 33.52 user 2.04 sys 17.43
2:  real 34.09 user 2.05 sys 17.85
3:  real 33.15 user 2.04 sys 18.71
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.95321 s, 8.7 GB/s real 3.95 user 0.12 sys 3.81
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.84837 s, 8.9 GB/s real 3.84 user 0.12 sys 3.71
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.84623 s, 8.9 GB/s real 3.84 user 0.12 sys 3.71
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.05409 s, 8.5 GB/s real 4.05 user 0.12 sys 3.92