0:  real 33.30 user 2.03 sys 17.38
1:  real 32.92 user 2.06 sys 17.65
2:  real 33.34 user 2.03 sys 17.61
3:  real 32.80 user 2.05 sys 18.96
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.88165 s, 8.9 GB/s real 3.88 user 0.12 sys 3.74
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.7496 s, 9.2 GB/s real 3.75 user 0.12 sys 3.61
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.85426 s, 8.9 GB/s real 3.85 user 0.12 sys 3.72
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.18059 s, 8.2 GB/s real 4.18 user 0.12 sys 4.04