0:  real 49.00 user 2.02 sys 17.98
1:  real 51.00 user 2.01 sys 18.38
2:  real 50.54 user 2.01 sys 18.01
3:  real 50.74 user 2.04 sys 18.27
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.9214 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, 4.03492 s, 8.5 GB/s real 4.03 user 0.12 sys 3.90
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.86327 s, 8.9 GB/s real 3.86 user 0.12 sys 3.73
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 4.02995 s, 8.5 GB/s real 4.03 user 0.12 sys 3.89