0:  real 52.49 user 0.24 sys 22.29
1:  real 52.33 user 0.23 sys 21.91
2:  real 52.14 user 0.24 sys 21.77
3:  real 52.31 user 0.25 sys 21.91
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.82779 s, 9.0 GB/s real 3.82 user 0.02 sys 3.79
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.85319 s, 8.9 GB/s real 3.85 user 0.01 sys 3.83
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.86811 s, 8.9 GB/s real 3.86 user 0.00 sys 3.85
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.89809 s, 8.8 GB/s real 3.89 user 0.03 sys 3.86