Okay, this isn't really an obfuscation, but it is better here than anywhere else I believe. What does it do? Pass it any number and it will see how many seconds it takes for your computer to count that high. Granted, your computer is actually faster: it would run faster without the print statements :)
#Usage: "script.pl INT" [INT = any # (5000+ to see anything)]
No, it doesn't break Deparse. I am still working on figuring out a destruction method for that...