The "Performance issues" sub-section of perlvar that Marshall links to covers this of course, but I think it's worth emphasizing that the related variables  $` $& $' all have the same problem prior to Perl 5.20.

Give a man a fish:  <%-{-{-{-<

In reply to Re^2: match function by AnomalousMonk
in thread match function by catfish1116

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