Bug: create latex png while export to HTML become very slow [6.35i]

[Lucas Peng <lucasp0927@gmail.com>]

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------------------------------------------------------------------------

After upgrade to 6.35i, export .org file with latex fragment become
extremly slow.

Emacs  : GNU Emacs 23.1.95.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.0)
 of 2010-04-05 on lucaspeng-laptop
Package: Org-mode version 6.35i

current state:
==============
(setq
 org-export-with-LaTeX-fragments t
 org-export-latex-after-initial-vars-hook '(org-beamer-after-initial-vars)
 org-agenda-custom-commands '(("h" "HomeWorks"
			       ((agenda "") (tags "HOMEWORK") (tags "STUDY")))
			      )
 org-agenda-files '("~/homework/wiki/todo.org")
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 outline-minor-mode-prefix [(control o)]
 org-export-latex-format-toc-function 'org-export-latex-format-toc-default
 org-export-preprocess-hook '(org-export-blocks-preprocess)
 org-tab-first-hook '(org-hide-block-toggle-maybe)
 org-src-mode-hook '(org-src-mode-configure-edit-buffer)
 org-confirm-shell-link-function 'yes-or-no-p
 org-export-first-hook '(org-beamer-initialize-open-trackers)
 org-agenda-include-all-todo t
 org-todo-keywords '("TODO" "STARTED" "DONE")
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
		  org-cycle-show-empty-lines
		  org-optimize-window-after-visibility-change)
 org-publish-project-alist '(("wiki" :base-directory "~/WikiNotes/org/"
			      :base-extension "org" :publishing-directory
			      "~/WikiNotes/publish/" :recursive t
			      :publishing-function org-publish-org-to-html
			      :section-numbers nil :auto-preamble t
			      :table-of-contents nil :style
			      "<link rel='stylesheet' type='text/css' href='css/style.css' />" :style-include-default t :author-info nil :email-info nil :creator-info nil)
			     ("wiki2" :base-directory "~/WikiNotes/org/"
			      :base-extension
			      "css\\|js\\|png\\|jpg\\|gif\\|pdf\\|mp3\\|ogg\\|swf" :publishing-directory "~/WikiNotes/publish/" :recursive t :publishing-function org-publish-attachment)
			     ("website" :components ("wiki" "wiki2")))
 org-export-preprocess-before-normalizing-links-hook '(org-remove-file-link-modifiers)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
		   [org-add-hook change-major-mode-hook org-show-block-all
		    append local]
		   5]
		 turn-on-org-cdlatex)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-occur-hook '(org-first-headline-recenter)
 org-export-preprocess-before-selecting-backend-code-hook '(org-beamer-select-beamer-code)
 org-remember-templates '(("Tasks" 116 "* TODO %?\n  %i\n  %a"
			   "/home/lucaspeng/homework/wiki/todo.org" nil)
			  ("Appointments" 97
			   "* Appointment: %?\n%^T\n%i\n  %a"
			   "~/organizer.org" nil)
			  )
 org-export-latex-final-hook '(org-beamer-amend-header org-beamer-fix-toc
			       org-beamer-auto-fragile-frames
			       org-beamer-place-default-actions-for-lists)
 )