This is benchmarking Perl-5.8 that was already 3 years old in 2010. With Perl-5.10 there is an optimization for matching alternations (|) that should drasticall

This is benchmarking Perl-5.8 that was already 3 years old in 2010. With Perl-5.10 there is an optimization for matching alternations (|) that should drastically change the results for the "URI|Email" pattern. In later versions of Perl (the last stable is 5.20) there are more optimizations in the RE engine and better Unicode support.