0:  real 50.75 user 2.00 sys 18.13
1:  real 50.45 user 2.02 sys 17.96
2:  real 50.55 user 2.03 sys 17.94
3:  real 50.52 user 2.04 sys 18.02
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.93566 s, 8.7 GB/s real 3.93 user 0.12 sys 3.79
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.95267 s, 8.7 GB/s real 3.95 user 0.12 sys 3.82
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.90258 s, 8.8 GB/s real 3.90 user 0.12 sys 3.77
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.93717 s, 8.7 GB/s real 3.93 user 0.12 sys 3.80