0:  real 51.85 user 0.21 sys 22.09
1:  real 52.45 user 0.21 sys 22.12
2:  real 52.50 user 0.22 sys 22.00
3:  real 52.36 user 0.15 sys 22.02
0:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.80769 s, 9.0 GB/s real 3.80 user 0.00 sys 3.80
1:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.82048 s, 9.0 GB/s real 3.82 user 0.01 sys 3.79
2:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.91956 s, 8.8 GB/s real 3.92 user 0.02 sys 3.88
3:  262144+0 records in 262144+0 records out 34359738368 bytes (34 GB) copied, 3.84661 s, 8.9 GB/s real 3.84 user 0.01 sys 3.82