0:  real 31.03 user 0.17 sys 19.86
1:  real 31.10 user 0.14 sys 20.03
2:  real 31.50 user 0.13 sys 20.81
3:  real 31.26 user 0.11 sys 21.21
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.66137 s, 9.4 GB/s real 3.66 user 0.02 sys 3.63
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.59173 s, 9.6 GB/s real 3.59 user 0.00 sys 3.58
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.57237 s, 9.6 GB/s real 3.57 user 0.01 sys 3.55
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.83518 s, 9.0 GB/s real 3.83 user 0.01 sys 3.81