master 28bf387: Tweak Fdirectory_append for efficiency

[Lars Ingebrigtsen]

branch: master
commit 28bf38743db6656715c5f3221d52467cbac4872f
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Tweak Fdirectory_append for efficiency
    
    * src/fileio.c (Fdirectory_append): Make slightly more efficient.
---
 src/fileio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/fileio.c b/src/fileio.c
index a4f0838..ddce472 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -795,7 +795,8 @@ usage: (record DIRECTORY &rest COMPONENTS) */)
       for (i = 0; i < nargs; i++)
        {
          Lisp_Object arg = args[i];
-         if (STRING_MULTIBYTE (arg))
+         /* Use multibyte or all-ASCII strings as is. */
+         if (STRING_MULTIBYTE (arg) || SCHARS (arg) == SBYTES (arg))
            elements[i] = arg;
          else
            elements[i] = make_multibyte_string (SSDATA (arg), SCHARS (arg),