By Mark-Jason Dominus, author of the Higher Order Perl book. Hints, articles, Perl modules, programs.

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A discussion of the complexity of regular expression matching algorithms in Perl.

An article about how to use regular expressions in Perl by M-J Dominus.

Notes and slides from a two part talk that, in its first part, details the algorithm that perl uses internally to do regex matching and, in its second part, discusses practical parsing applications and RegEx optimization

Slides from a talk the author presented at TPC and YAPC. Covers the /o flag and re 'eval'.