in reply to Warnings and Strict in Production/Performance
There are different types of warnings: Perl-warnings and other warnings. I think you should never see Perl-warnings in production for multiple reasons:
- variables used without initialisation or declaration, accessing non-existent array cells; this will undoubtedly cause unreliable output
- security concerns: warnings might reveal more than you want in case security is an issue
Of course, there are other, non-Perl errors, like "Disk is almost full". These messages should be logged to a file and regularly inspected. I would not use "warn" for this.
Back to your question: I use strict in production, and depending on the type of application and its audience (general audience: no, expert audience: yes) warnings.
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Seekers of Perl Wisdom