Subject: Re: #39595: M-x compile still very line-length weak

From: Mattias Engdegård <[email-masked]>
Date: Fri, 14 Feb 2020 23:47:43 +0100

14 feb. 2020 kl. 18.00 skrev Eli Zaretskii <[email-masked]>:

> Is there some forum where the relevant people could be asked about
> this?

Not sure where to go for that. The problem is really in Emacs's hacky implementation: when 'omake' is included in compilation-error-regexp-alist, many other regexps are rewritten in a way that makes them potentially slower. This is why it's not an ideal feature to have enabled by default.

Attached are two patches: one that anchors the regexp for Maven, and one that speeds up 'msft' and 'watcom' by eliminating the same repetition-after-repetition flaw in each (not much different from those found by the latest relint/xr scan posted to emacs-devel).