[wittekm]

Some projects need performant regexes, and some honestly just don't. I agree that keeping the base regex library linear is admirable, but it's be nice if they offered a well-marked thing like regex.slow_and_perl_like in the stdlib

[alexhutcheson]

https://godoc.org/github.com/glenn-brown/golang-pkg-pcre/src...

[patrec]

This would contravene the training-wheels nature of Go.

Also, Perl-style (ir-)regular expressions, despite their popularity, are not a worthwhile abstraction IMO and thus should not be enshrined in the standard library of programming languages, even if you want them in your library eco-system for end-user facing API compatibility.