Package: emacs;
Reported by: joaotavora <at> gmail.com (Joao Tavora)
Date: Wed, 17 Mar 2010 22:11:02 UTC
Severity: normal
Done: Chong Yidong <cyd <at> gnu.org>
Bug is archived. No further changes may be made.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: joaotavora <at> gmail.com (Joao Tavora) To: bug-gnu-emacs <at> gnu.org Subject: 23.1.94; (forward-sexp N) at the very end of large latex-mode buffer takes time proportional to N Date: Wed, 17 Mar 2010 23:04:18 +0100
Hi, This originated in http://code.google.com/p/autopair/issues/detail?id=21: start with `emacs -Q' M-x eval-expression RET (insert (make-string 100000 ?a)) RET M-x eval-expression RET (latex-mode) RET M-x eval-expression RET (forward-sexp 200) RET M-x eval-expression RET (forward-sexp 500) RET M-x eval-expression RET (forward-sexp (point-max)) RET In some versions of emacs this does not happen, notably my earlier Carbon Emacs "GNU Emacs 22.3.1 (i386-apple-darwin9.7.0, Carbon Version 1.6.0) of 2009-07-26 on gs674-seijiz.local" after loading some lisp libraries (don't know which), like the ones I have bellow (autopair, yasnippet). The purpose I use these kind of calls to `forward-sexp' is to check if the buffer is sexp-balanced, as in autopair.el. Now I think I can work around this in my lisp code without using this kind of call, but still... When point reaches the end of the buffer, scan_lists in syntax.c can just return right? Thanks in advance, Joao Tavora In GNU Emacs 23.1.94.5 (x86_64-apple-darwin10.2.0, NS apple-appkit-1038.25) of 2010-03-16 on king.local Windowing system distributor `Apple', version 10.3.1038 configured using `configure '--with-ns'' Important settings: value of $LC_ALL: nil value of $LC_COLLATE: nil value of $LC_CTYPE: nil value of $LC_MESSAGES: nil value of $LC_MONETARY: nil value of $LC_NUMERIC: nil value of $LC_TIME: nil value of $LANG: nil value of $XMODIFIERS: nil locale-coding-system: nil default enable-multibyte-characters: t Major mode: Apropos Minor modes in effect: shell-dirtrack-mode: t yas/global-mode: t display-time-mode: t cua-mode: t autopair-mode: t autopair-global-mode: t global-hl-line-mode: t recentf-mode: t show-paren-mode: t ido-everywhere: t global-hs-mode: t heretic/mode: 0 tooltip-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Recent input: <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <wheel-down> <double-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <triple-wheel-up> <wheel-down> <double-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <wheel-down> <double-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up> <down-mouse-1> <mouse-1> <wheel-down> <double-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <triple-wheel-down> <down-mouse-1> <mouse-1> s-x M-< C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n M-x e m a c <tab> r e p o <tab> <backspace> <backspace> <backspace> <backspace> b u <tab> <tab> <tab> <backspace> <backspace> <tab> C-g M-x b C-g M-x a p r o p o s RET b u g <tab> <backspace> RET C-x o C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-s e m a c s C-s C-s C-s C-p C-b C-b C-b C-b C-b C-b RET C-n C-n C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-n C-n C-n C-n C-n C-n M-x r e p o r t SPC e m a c <tab> RET Recent messages: 1293422 (#o4736156, #x13bc6e) nil [2 times] byte-code: End of buffer [2 times] byte-code: Beginning of buffer [2 times] byte-code: End of buffer [7 times] Mark set Making completion list... Quit [2 times] Mark saved where search started Type M-x display-buffer RET to restore the other window. 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