0:  real 31.41 user 2.03 sys 17.60
1:  real 34.14 user 2.05 sys 17.79
2:  real 34.38 user 2.05 sys 18.45
3:  real 34.90 user 2.04 sys 19.16
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.74961 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, 3.812 s, 9.0 GB/s real 3.81 user 0.12 sys 3.67
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.75853 s, 9.1 GB/s real 3.75 user 0.12 sys 3.62
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.16098 s, 8.3 GB/s real 4.16 user 0.12 sys 4.02