Bug: org-babel-expand-noweb-references is very slow [9.1.9 (release_9.1.9-65-g5e4542 @ /usr/share/emacs/26.3/lisp/org/)]

[Vladimir Nikishkin <lockywolf@gmail.com>]

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

Hello, everyone.

The mwe would be like:

#+begin_src scheme :exports both :results output :noweb-ref bug1
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug2
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug3
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug4
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug5
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug6
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug7
#+end_src
#+begin_src scheme :exports both :results output :noweb-ref bug8
#+end_src
#+begin_src scheme :exports both :results output
<<bug1>>
<<bug2>>
<<bug3>>
<<bug4>>
<<bug5>>
<<bug6>>
<<bug7>>
<<bug8>>
#+end_src

C-c C-v C-v is already very slow, takes ~15 seconds to resolve the references
(can be seen in the Emacs Profiler), even though the inclusion graph is
very simple.

Emacs  : GNU Emacs 26.3 (build 1, x86_64-slackware-linux-gnu, GTK+ Version 3.24.10)
 of 2019-08-30
Package: Org mode version 9.1.9 (release_9.1.9-65-g5e4542 @ /usr/share/emacs/26.3/lisp/org/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-babel-after-execute-hook '((lambda nil
				 (if org-inline-image-overlays
				  (progn (org-redisplay-inline-images)))
				 )
				)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-html-format-inlinetask-function 'org-html-format-inlinetask-default-function
 org-pretty-entities t
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-agenda-files '("~/DevLinux/chibi-sicp/index.org" "~/Personal_Planner/Planner.org")
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-modules '(org-habits org-w3m org-bbdb org-bibtex org-docview org-gnus org-info org-irc
	       org-mhe org-rmail)
 org-plantuml-jar-path "/usr/local/bin/plantuml.jar"
 org-mode-hook '(turn-on-org-cdlatex (lambda nil (imenu-add-to-menubar "Imenu"))
		 #[0 "\300\301\302\303\304$\207"
		   [add-hook change-major-mode-hook org-show-block-all append local] 5]
		 #[0 "\300\301\302\303\304$\207"
		   [add-hook change-major-mode-hook org-babel-show-result-all append local] 5]
		 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3 "\n\n(fn ENTRY)"]
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-latex-compiler "lualatex"
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe org-babel-header-arg-expand)
 org-babel-load-languages '((plantuml . t) (C . t) (scheme . t) (latex . t))
 org-log-done 'time
 org-startup-align-all-tables t
 org-ascii-format-drawer-function #[771 "\207" [] 4 "\n\n(fn NAME CONTENTS WIDTH)"]
 org-catch-invisible-edits t
 org-occur-hook '(org-first-headline-recenter)
 org-edit-src-auto-save-idle-delay 15
 org-agenda-include-diary t
 org-structure-template-alist '(("E"
				 "#+begin_src elisp :exports both :results output\n?\n#+end_src")
				("SV"
				 "#+begin_src scheme :exports both :results value\n?\n#+end_src")
				("SO"
				 "#+begin_src scheme :exports both :results output\n?\n#+end_src")
				("p"
				 "#+begin_src plantuml :exports both :file ? \n#+end_src ")
				("s" "#+BEGIN_SRC ?\n\n#+END_SRC")
				("e" "#+BEGIN_EXAMPLE\n?\n#+END_EXAMPLE")
				("q" "#+BEGIN_QUOTE\n?\n#+END_QUOTE")
				("v" "#+BEGIN_VERSE\n?\n#+END_VERSE")
				("V" "#+BEGIN_VERBATIM\n?\n#+END_VERBATIM")
				("c" "#+BEGIN_CENTER\n?\n#+END_CENTER")
				("C" "#+BEGIN_COMMENT\n?\n#+END_COMMENT")
				("l" "#+BEGIN_EXPORT latex\n?\n#+END_EXPORT")
				("L" "#+LaTeX: ")
				("h" "#+BEGIN_EXPORT html\n?\n#+END_EXPORT") ("H" "#+HTML: ")
				("a" "#+BEGIN_EXPORT ascii\n?\n#+END_EXPORT")
				("A" "#+ASCII: ") ("i" "#+INDEX: ?")
				("I" "#+INCLUDE: %file ?"))
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
		  org-cycle-show-empty-lines org-optimize-window-after-visibility-change)
 org-edit-src-turn-on-auto-save t
 org-speed-command-hook '(org-speed-command-activate org-babel-speed-command-activate)
 org-hierarchical-todo-statistics nil
 org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function
 org-babel-tangle-lang-exts '(("latex" . "tex") ("D" . "d") ("C++" . "cpp")
			      ("emacs-lisp" . "el") ("elisp" . "el"))
 org-format-latex-options '(:foreground default :background default :scale 2.0
			    :html-foreground "Black" :html-background "Transparent"
			    :html-scale 1.0 :matchers ("begin" "$1" "$" "$$" "\\(" "\\["))
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("id" :follow org-id-open)
		       ("rmail" :follow org-rmail-open :store org-rmail-store-link)
		       ("mhe" :follow org-mhe-open :store org-mhe-store-link)
		       ("irc" :follow org-irc-visit :store org-irc-store-link)
		       ("info" :follow org-info-open :export org-info-export :store
			org-info-store-link)
		       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
		       ("docview" :follow org-docview-open :export org-docview-export :store
			org-docview-store-link)
		       ("bibtex" :follow org-bibtex-open :store org-bibtex-store-link)
		       ("bbdb" :follow org-bbdb-open :export org-bbdb-export :complete
			org-bbdb-complete-link :store org-bbdb-store-link)
		       ("w3m" :store org-w3m-store-link) ("file+sys") ("file+emacs")
		       ("doi" :follow org--open-doi-link)
		       ("elisp" :follow org--open-elisp-link)
		       ("file" :complete org-file-complete-link)
		       ("ftp" :follow (lambda (path) (browse-url (concat "ftp:" path))))
		       ("help" :follow org--open-help-link)
		       ("http" :follow (lambda (path) (browse-url (concat "http:" path))))
		       ("https" :follow (lambda (path) (browse-url (concat "https:" path))))
		       ("mailto" :follow (lambda (path) (browse-url (concat "mailto:" path))))
		       ("news" :follow (lambda (path) (browse-url (concat "news:" path))))
		       ("shell" :follow org--open-shell-link))
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-agenda-start-with-follow-mode t
 org-latex-format-inlinetask-function 'org-latex-format-inlinetask-default-function
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-image-actual-width nil
 org-html-use-infojs t
 org-html-format-headline-function 'org-html-format-headline-default-function
 org-confirm-babel-evaluate 'my-org-confirm-babel-evaluate
 org-use-speed-commands t
 org-latex-bib-compiler "biber"
 org-default-notes-file "~/org/notes.org"
 )
-- 
--
Vladimir Nikishkin (MiEr, lockywolf)