C:\test>junk -N=100
Took 0.001339 seconds for 100 items (0.000013 per item)

C:\test>junk -N=1000
Took 0.105176 seconds for 1000 items (0.000105 per item)

C:\test>junk -N=10000
Took 11.326000 seconds for 10000 items (0.001133 per item)

C:\test>junk -N=20000
Took 46.241000 seconds for 20000 items (0.002312 per item)

C:\test>junk -N=30000
Took 105.498000 seconds for 30000 items (0.003517 per item)

C:\test>junk -N=40000
Took 186.630000 seconds for 40000 items (0.004666 per item)