Subject: wildcards dir-locals causes significant build slow-down in some cases

From: Glenn Morris <[email-masked]>
Date: Mon, 04 Jan 2016 20:24:23 -0500

Package: emacs
Version: 25.0.50

commit 2e8488858c (allow wildcards in dir-locals) caused a significant
(~20%) build slow down in some cases.

Ref thread:
http://lists.gnu.org/archive/html/emacs-devel/2015-12/msg00636.html