With the current CVS Emacs, info is quite slow. Calling (info) takes
about 1.7 seconds here. I've already set
Info-fontify-maximum-menu-size to 30000 and so fontification is
disabled. (With fontification it takes 2.4 seconds.)
With the patch below it takes about only 0.3 seconds.
The modification is quite small: it replaces the expensive call to
member-ignore-case with a call to member and only keeps downcased
strings around.
Helmut.
--- info.el 07 Aug 2005 16:06:08 +0200 1.438
+++ info.el 07 Aug 2005 23:51:10 +0200
@@ -1152,17 +1152,17 @@ (defun Info-dir-remove-duplicates ()
(delete-region (1- (point)) (point))))
;; Now remove duplicate entries under the same heading.
- (let ((seen nil)
+ (let ((seen '())
(limit (point)))
(goto-char start)
(while (re-search-forward "^* \\([^:\n]+:\\(:\\|[^.\n]+\\).\\)"
limit 'move)
- (let ((x (match-string 1)))
- (if (member-ignore-case x seen)
+ (let ((key (downcase (match-string 1))))
+ (if (member key seen)
(delete-region (match-beginning 0)
(progn (re-search-forward "^[^ \t]" nil t)
(match-beginning 0)))
- (push x seen))))))))))
+ (push key seen))))))))))
;; Note that on entry to this function the current-buffer must be the
;; *info* buffer; not the info tags buffer.
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