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

diff --git a/lisp/net/rcirc.el b/lisp/net/rcirc.el
index 60af1973ccb4c7901e823c6c75837c52c7940496..6377f791f456c2d11df3775cda90da378ce89593 100644 (file)
--- 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