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org-babel-tangle-collect-blocks: Use cache 

* lisp/ob-tangle.el (org-babel-tangle-collect-blocks): Use element
cache to find the containing headline instead of regexp search.
Direct regexp search sometimes causes quadratic scaling.

See https://lists.gnu.org/r/emacs-orgmode/2022-01/msg00484.html
This commit is contained in:
Ihor Radchenko 2022-01-26 19:27:03 +08:00
parent 70970dff8d
commit 2ae8d6c1cf
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GPG Key ID: 6470762A7DA11D8B
1 changed files with 7 additions and 2 deletions
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lisp/ob-tangle.el
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@ -37,6 +37,9 @@
(declare-function org-babel-update-block-body "ob-core" (new-body))
(declare-function org-back-to-heading "org" (&optional invisible-ok))
(declare-function org-before-first-heading-p "org" ())
(declare-function org-element--cache-active-p "org-element" ())
(declare-function org-element-lineage "org-element" (datum &optional types with-self))
(declare-function org-element-property "org-element" (property element))
(declare-function org-element-at-point "org-element" (&optional pom cached-only))
(declare-function org-element-type "org-element" (element))
(declare-function org-heading-components "org" ())
@ -425,8 +428,10 @@ code blocks by target file."
(let ((counter 0) last-heading-pos blocks)
(org-babel-map-src-blocks (buffer-file-name)
(let ((current-heading-pos
(org-with-wide-buffer
(org-with-limited-levels (outline-previous-heading)))))
(if (org-element--cache-active-p)
(or (org-element-property :begin (org-element-lineage (org-element-at-point) '(headline) t)) 1)
(org-with-wide-buffer
(org-with-limited-levels (outline-previous-heading))))))
(if (eq last-heading-pos current-heading-pos) (cl-incf counter)
(setq counter 1)
(setq last-heading-pos current-heading-pos)))