0:  real 49.88 user 2.02 sys 17.98
1:  real 50.83 user 2.02 sys 18.31
2:  real 50.84 user 2.02 sys 18.36
3:  real 51.04 user 2.02 sys 18.55
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.98992 s, 8.6 GB/s real 3.99 user 0.12 sys 3.85
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.97256 s, 8.6 GB/s real 3.97 user 0.12 sys 3.83
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.9576 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, 4.03643 s, 8.5 GB/s real 4.03 user 0.12 sys 3.90