0:  real 49.79 user 2.00 sys 18.32
1:  real 50.72 user 2.03 sys 18.23
2:  real 50.55 user 2.02 sys 18.10
3:  real 50.71 user 2.02 sys 18.14
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.91018 s, 8.8 GB/s real 3.91 user 0.12 sys 3.77
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.00882 s, 8.6 GB/s real 4.00 user 0.12 sys 3.87
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.00765 s, 8.6 GB/s real 4.00 user 0.12 sys 3.87
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.97465 s, 8.6 GB/s real 3.97 user 0.12 sys 3.84