0:  real 52.31 user 0.24 sys 21.85
1:  real 52.49 user 0.14 sys 21.96
2:  real 52.21 user 0.17 sys 21.90
3:  real 52.19 user 0.18 sys 21.92
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.70711 s, 9.3 GB/s real 3.70 user 0.01 sys 3.68
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.78792 s, 9.1 GB/s real 3.78 user 0.01 sys 3.76
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.78544 s, 9.1 GB/s real 3.78 user 0.01 sys 3.76
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.81401 s, 9.0 GB/s real 3.81 user 0.00 sys 3.80