diff options
Diffstat (limited to 'lisp')
| -rw-r--r-- | lisp/net/puny.el | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lisp/net/puny.el b/lisp/net/puny.el index 5874871a90d..389a6dc2700 100644 --- a/lisp/net/puny.el +++ b/lisp/net/puny.el @@ -32,7 +32,11 @@ (defun puny-encode-domain (domain) "Encode DOMAIN according to the IDNA/punycode algorith. For instance, \"fśf.org\" => \"xn--ff-2sa.org\"." - (mapconcat 'puny-encode-string (split-string domain "[.]") ".")) + ;; The vast majority of domain names are not IDNA domain names, so + ;; add a check first to avoid doing unnecessary work. + (if (string-match "\\'[[:ascii:]]*\\'" domain) + domain + (mapconcat 'puny-encode-string (split-string domain "[.]") "."))) (defun puny-encode-string (string) "Encode STRING according to the IDNA/punycode algorithm. |