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CC Mode 5.28 (C++); Huge Performance Problem


From: Jake Colman
Subject: CC Mode 5.28 (C++); Huge Performance Problem
Date: Wed, 08 Oct 2003 14:39:50 -0400

Upgrading from this version of cc-mode (5.28) as delivered in the XEmacs
Package v1.33 my performance is fine.  Upgrading to the latest cc-mode
version as deliverd in XEmacs Package v1.40 ( cc-mode 5.30) causes a huuuge
decrease in scrolling performance. XEmacs becomes remarkably unresponsive.
Simply doing PgUp or PdDn has appx a 1.5 to 2 second delay.  All other
packages, including font-lock (in case that is relevant) are at the latest
revisions.  Only cc-mode displays this problem and only in releases greater
than 5.28.

I don't monitor the bug-reporting mailing lists so I would appreciate a reply
back to my email address.  Thanks!

Emacs  : XEmacs 21.4 (patch 14) "Reasonable Discussion" [Lucid] 
(sparc-sun-solaris2.7) of Thu Sep 11 2003 on newjersey
Package: CC Mode 5.28 (C++)
Buffer Style: PERSONAL_C/C++

c-emacs-features: (8-bit)

current state:
==============
(setq
 c-basic-offset 2
 c-comment-only-line-offset 0
 c-block-comment-prefix "* "
 c-comment-prefix-regexp '((pike-mode . "//+!?\\|\\**") (other . "//+\\|\\**"))
 c-cleanup-list '(scope-operator empty-defun-braces defun-close-semi)
 c-hanging-braces-alist '((substatement-open before after) (inline-open)
                          (inline-close) (brace-list-open)
                          (block-close . c-snug-do-while))
 c-hanging-colons-alist '((member-init-intro before) (inher-intro)
                          (case-label after) (label after) (access-label after))
 c-hanging-semi&comma-criteria '(c-semi&comma-inside-parenlist)
 c-backslash-column 48
 c-label-minimum-indentation 1
 c-offsets-alist '((string . c-lineup-dont-change)
                   (c . c-lineup-C-comments)
                   (defun-open . 0)
                   (defun-close . 0)
                   (defun-block-intro . +)
                   (class-open . 0)
                   (class-close . 0)
                   (inline-close . 0)
                   (func-decl-cont . +)
                   (knr-argdecl . 0)
                   (topmost-intro . 0)
                   (topmost-intro-cont . +)
                   (member-init-intro . +)
                   (member-init-cont . c-lineup-multi-inher)
                   (inher-intro . +)
                   (inher-cont . c-lineup-multi-inher)
                   (block-open . 0)
                   (block-close . 0)
                   (brace-list-close . 0)
                   (brace-list-intro . +)
                   (brace-list-entry . 0)
                   (brace-entry-open . 0)
                   (statement . 0)
                   (statement-case-intro . +)
                   (substatement . +)
                   (case-label . +)
                   (access-label . -)
                   (do-while-closure . 0)
                   (else-clause . 0)
                   (catch-clause . 0)
                   (comment-intro . c-lineup-comment)
                   (arglist-cont . 0)
                   (arglist-cont-nonempty . c-lineup-arglist)
                   (stream-op . c-lineup-streamop)
                   (inclass . +)
                   (cpp-macro . [0])
                   (cpp-macro-cont . c-lineup-dont-change)
                   (friend . 0)
                   (objc-method-intro . [0])
                   (objc-method-args-cont . c-lineup-ObjC-method-args)
                   (objc-method-call-cont . c-lineup-ObjC-method-call)
                   (extern-lang-open . 0)
                   (extern-lang-close . 0)
                   (inextern-lang . +)
                   (namespace-open . 0)
                   (namespace-close . 0)
                   (innamespace . 0)
                   (template-args-cont c-lineup-template-args +)
                   (inlambda . c-lineup-inexpr-block)
                   (lambda-intro-cont . +)
                   (inexpr-statement . 0)
                   (inexpr-class . +)
                   (statement-block-intro . +)
                   (knr-argdecl-intro . +)
                   (substatement-open . 0)
                   (label . 2)
                   (statement-case-open . 0)
                   (statement-cont . +)
                   (arglist-intro . +)
                   (arglist-close . c-lineup-arglist)
                   (inline-open . +)
                   (brace-list-open . 0)
                   )
 c-delete-function 'delete-char
 c-electric-pound-behavior '(alignleft)
 c-indent-comments-syntactically-p nil
 c-tab-always-indent nil
 defun-prompt-regexp nil
 tab-width 8
 comment-column 50
 parse-sexp-ignore-comments t
 signal-error-on-buffer-boundary t
 auto-fill-function 'c-do-auto-fill
 filladapt-mode t
 comment-multi-line t
 comment-start-skip "/\\*+ *\\|//+ *"
 fill-prefix nil
 paragraph-start "[     ]*\\(//+\\|\\**\\)[     ]*$\\|^"
 adaptive-fill-mode t
 adaptive-fill-regexp "[        ]*\\(//+\\|\\**\\)[     ]*\\([  ]*\\([#;>*]+ 
+\\)?\\)"
 )
-- 
Jake Colman                     

Principia Partners LLC                    Phone: (201) 209-2467
Harborside Financial Center                 Fax: (201) 946-0320
902 Plaza Two                          E-mail: address@hidden
Jersey City, NJ 07311                 www.principiapartners.com




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