in reply to •Re: RegEx re-compilation
in thread RegEx re-compilation

Is it helpful? No. Is it harmful? No, except that including that switch on a regex without variables might make me question the rest of your Perl understanding in a code review.

I'd say that it can be harmful. Given the dynamic nature of code, an /o on a RE could cause some hard-to-find bugs if the RE were modified to use a variable but the /o not removed. In fact, I'd advocate that /o on a RE without variables should illicit a warning when -w is in effect.

duff

In Section Seekers of Perl Wisdom