https://bugs.exim.org/show_bug.cgi?id=547
--- Comment #6 from Ouims <c_moi_l_mas...@hotmail.com> --- Yes, just some feedbacks... I think that modern regex engine, which pcre2 is, left the 'efficiency' as well as the 'regular' boat a long time ago. Many, many, many typical regex pattern are nowadays written by using lookaround and others more complex structures instead of normal alternatives and groups and character classes. Almost everytime, this is resulting in the same result but being achieved slower. Of course it can be made to be as good as what basic ERE can do, but it's often not the case that the adjustement are made. And there's no claim from regex engines supporting variable width lookbehind that they are doing so efficiently. I don't think that arguing it's not going to be efficient is a good reason to not do it, I would find a reason such as perl not supporting it way better. I guess I should convince perl people to do it hehe. -- You are receiving this mail because: You are on the CC list for the bug. -- ## List details at https://lists.exim.org/mailman/listinfo/pcre-dev
