; Add a comment for make-text-button in rcirc-markup-urls

1 files changed, 3 insertions, 0 deletions

diff --git a/lisp/net/rcirc.el b/lisp/net/rcirc.el
index 60af1973ccb..6377f791f45 100644
--- a/lisp/net/rcirc.el
+++ b/lisp/net/rcirc.el
@@ -2499,6 +2499,9 @@ If ARG is given, opens the URL in a new browser window."
            (end (match-end 0))
            (url (match-string-no-properties 0))
            (link-text (buffer-substring-no-properties start end)))
+      ;; Add a button for the URL.  Note that we use `make-text-button',
+      ;; rather than `make-button', as text-buttons are much faster in
+      ;; large buffers.
       (make-text-button start end
                         'face 'rcirc-url
                         'follow-link t