0:  real 52.18 user 0.21 sys 22.09
1:  real 52.43 user 0.17 sys 22.04
2:  real 52.35 user 0.23 sys 21.87
3:  real 52.14 user 0.21 sys 21.75
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.74558 s, 9.2 GB/s real 3.74 user 0.00 sys 3.73
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.78859 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, 3.80233 s, 9.0 GB/s real 3.80 user 0.00 sys 3.79
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.82496 s, 9.0 GB/s real 3.82 user 0.00 sys 3.81