perl demo_win.pl 1e7 :  3.288 seconds ( 8 workers)
perl demo_win.pl 1e8 : 41.899 seconds

perl demo_win.pl 1e7 :  2.331 seconds (16 workers)
perl demo_win.pl 1e8 : 23.329 seconds

perl demo_win.pl 1e7 :  1.642 seconds (24 workers)
perl demo_win.pl 1e8 : 16.941 seconds

perl demo_win.pl 1e7 :  1.310 seconds (32 workers)
perl demo_win.pl 1e8 : 13.198 seconds

perl demo_win.pl 1e7 :  1.139 seconds (40 workers)
perl demo_win.pl 1e8 : 10.925 seconds

perl demo_win.pl 1e7 :  1.004 seconds (48 workers)
perl demo_win.pl 1e8 :  9.791 seconds

perl demo_win.pl 1e7 :  0.946 seconds (56 workers)
perl demo_win.pl 1e8 :  8.913 seconds

perl demo_win.pl 1e7 :  0.877 seconds (64 workers)
perl demo_win.pl 1e8 :  8.305 seconds