0:  real 50.60 user 2.02 sys 17.98
1:  real 50.74 user 2.01 sys 18.06
2:  real 50.67 user 2.02 sys 18.08
3:  real 50.65 user 2.02 sys 18.10
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.05004 s, 8.5 GB/s real 4.05 user 0.12 sys 3.91
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.95391 s, 8.7 GB/s real 3.95 user 0.12 sys 3.82
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.95785 s, 8.7 GB/s real 3.95 user 0.12 sys 3.82
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.01038 s, 8.6 GB/s real 4.01 user 0.12 sys 3.87