From: Dmitry Gutov <dgutov@yandex.ru>
Date: Mon, 6 Jul 2020 00:50:59 +0000 (+0300)
Subject: ; Add a note about a bottleneck
X-Git-Tag: emacs-28.0.90~7064
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=9f9ce631a2ff44ebcb87b0b1390a21b13665db43;p=emacs.git

; Add a note about a bottleneck
---

diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
index 08798d86f8e..188236427da 100644
--- a/lisp/progmodes/project.el
+++ b/lisp/progmodes/project.el
@@ -396,6 +396,8 @@ backend implementation of `project-external-roots'.")
        (setq files
              (mapcar
               (lambda (file) (concat default-directory file))
+              ;; XXX: With large enough project, split-string becomes
+              ;; one of the bottlenecks.
               (split-string
                (apply #'vc-git--run-command-string nil "ls-files" args)
                "\0" t)))