c:\test>junk7 -N=10e3 ### 1/2 MB
Took 0.098 seconds
Took 34.255 seconds

c:\test>junk7 -N=20e3 ### 1 MB
Took 0.197 seconds
Took 137.506 seconds

c:\test>junk7 -N=1e6 ### 50 MB
Took 9.449 seconds
^C