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Make less garbage in overlay heavy buffers

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* yasnippet.el (yas-active-snippets): Use dolist+when-push instead of
mapcar+delq.
This commit is contained in:
Noam Postavsky 2018-04-10 09:18:36 -04:00
parent 4f78d03f85
commit 4af33546d8
1 changed files with 13 additions and 6 deletions
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19
yasnippet.el
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@ -3273,12 +3273,19 @@ equivalent to a range covering the whole buffer."
(setq beg (point-min) end (point-max)))
((not end)
(setq end (1+ beg))))
(cl-sort
(delete-dups ;; Snippets have multiple overlays.
(delq nil
(mapcar (lambda (ov) (overlay-get ov 'yas--snippet))
(overlays-in beg end))))
#'>= :key #'yas--snippet-id))
;; Note: don't use `mapcar' here, since it would allocate in
;; proportion to the amount of overlays, even though the list of
;; active snippets should be very small. That is important because
;; this function is called in the post-command hook (via
;; `yas--check-commit-snippet').
(let ((snippets nil))
(dolist (ov (overlays-in beg end))
(let ((snippet (overlay-get ov 'yas--snippet)))
;; Snippets have multiple overlays, so check for dups.
(when (and snippet (not (memq snippet snippets)))
(push snippet snippets))))
(cl-sort snippets #'>= :key #'yas--snippet-id)))
(define-obsolete-function-alias 'yas--snippets-at-point
'yas-active-snippets "0.12")