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If it helps at all, I develop software that runs on embedded systems like printers and factory robots. We develop in C, rather than Perl, but we not only have all build-time warnings turned up to maximum, but we won't accept any production code in which any warning occurs, for the same reasons as are mentioned above.<humour>
And also because I imagine that if it is the factory robot the one to issue the warning... it's gonna be a "warning you can't ignore"!!
In reply to Re^2: Warnings and Strict in Production/Performance