0:  real 50.56 user 2.02 sys 17.69
1:  real 50.93 user 2.06 sys 17.98
2:  real 50.74 user 2.03 sys 18.05
3:  real 50.72 user 2.02 sys 18.13
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.08081 s, 8.4 GB/s real 4.08 user 0.12 sys 3.94
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.98293 s, 8.6 GB/s real 3.98 user 0.12 sys 3.84
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.0426 s, 8.5 GB/s real 4.04 user 0.12 sys 3.90
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.96659 s, 8.7 GB/s real 3.96 user 0.12 sys 3.83