+time `dired-insert-directory' is called.
+
+Note that if you set this option to nil, either through choice or
+because your \"ls\" program does not support \"--dired\", Dired
+will fail to parse some \"unusual\" file names, e.g. those with leading
+spaces. You might want to install ls from GNU Coreutils, which does
+support this option. Alternatively, you might want to use Emacs's
+own emulation of \"ls\", by using:
+ \(setq ls-lisp-use-insert-directory-program nil)
+ \(require 'ls-lisp)
+This is used by default on MS Windows, which does not have an \"ls\" program.
+Note that `ls-lisp' does not support as many options as GNU ls, though.
+For more details, see Info node `(emacs)ls in Lisp'."