I'm surprised; "use warnings" saved my a** a couple of times, and the overhead is really small : 
$ wc -l *.p* | tail -n 1
  6949 total
$ grep "no warnings" *.pl | wc -l
8

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In reply to Re^3: Coding styles: OOP vs. Subs by wazoox
in thread Coding styles: OOP vs. Subs by nikos

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