0:  real 33.10 user 2.03 sys 17.61
1:  real 34.14 user 2.05 sys 18.05
2:  real 33.43 user 2.03 sys 17.86
3:  real 35.00 user 2.02 sys 18.92
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.75036 s, 9.2 GB/s real 3.75 user 0.12 sys 3.61
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.8327 s, 9.0 GB/s real 3.83 user 0.12 sys 3.70
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.78127 s, 9.1 GB/s real 3.78 user 0.12 sys 3.64
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.15015 s, 8.3 GB/s real 4.15 user 0.12 sys 4.01