0:  real 49.89 user 2.03 sys 17.74
1:  real 50.54 user 2.02 sys 17.80
2:  real 50.51 user 2.04 sys 17.95
3:  real 50.48 user 2.03 sys 17.83
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.92061 s, 8.8 GB/s real 3.92 user 0.12 sys 3.78
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.91986 s, 8.8 GB/s real 3.92 user 0.12 sys 3.78
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.93513 s, 8.7 GB/s real 3.93 user 0.12 sys 3.80
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.95475 s, 8.7 GB/s real 3.95 user 0.12 sys 3.82