FAQ 1.7 How stable is Perl?

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This is an excerpt from the latest version perlfaq1.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .


1.7: How stable is Perl?

    Production releases, which incorporate bug fixes and new functionality,
    are widely tested before release. Since the 5.000 release, we have
    averaged only about one production release per year.

    Larry and the Perl development team occasionally make changes to the
    internal core of the language, but all possible efforts are made toward
    backward compatibility. While not quite all Perl 4 scripts run
    flawlessly under Perl 5, an update to perl should nearly never
    invalidate a program written for an earlier version of perl (barring
    accidental bug fixes and the rare new keyword).


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