0:  real 13.18 user 0.05 sys 11.15
1:  real 13.07 user 0.05 sys 11.50
2:  real 13.18 user 0.05 sys 11.49
3:  real 13.01 user 0.05 sys 11.46
0:  262144+0 records in 262144+0 records out real 3.13 user 0.09 sys 3.02
1:  262144+0 records in 262144+0 records out real 3.11 user 0.10 sys 3.01
2:  262144+0 records in 262144+0 records out real 3.20 user 0.10 sys 3.08
3:  262144+0 records in 262144+0 records out real 3.13 user 0.09 sys 3.03