0:  real 36.21 user 0.19 sys 22.10
1:  real 36.67 user 0.20 sys 22.35
2:  real 36.22 user 0.19 sys 22.07
3:  real 35.91 user 0.21 sys 22.66
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.6853 s, 9.3 GB/s real 3.68 user 0.02 sys 3.65
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.70229 s, 9.3 GB/s real 3.70 user 0.02 sys 3.67
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.68703 s, 9.3 GB/s real 3.68 user 0.02 sys 3.65
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.93823 s, 8.7 GB/s real 3.93 user 0.01 sys 3.91