Re: Question about memory usage

["Michał Kondraciuk" <k.michal@zoho.com>]

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On 04/05/2018 08:54 PM, Stefan Monnier wrote:
> We could/should probably arrange to scan for dead buffers every time we
> add a new buffer to it, or from kill-buffer-hook.

Can you take a look at the attached patch?

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diff --git a/lisp/simple.el b/lisp/simple.el
index aad8d3b..23f7c4f 100644
--- a/lisp/simple.el
+++ b/lisp/simple.el
@@ -3014,6 +3014,13 @@ undo-auto--undoably-changed-buffers
 `undo-auto--boundaries' and can be affected by changes to their
 default values.")
 
+(defun undo-auto--remove-buffer-from-changed-list ()
+  "Remove current buffer from list of recently changed ones."
+  (setq undo-auto--undoably-changed-buffers
+        (delq (current-buffer) undo-auto--undoably-changed-buffers)))
+
+(add-hook 'kill-buffer-hook #'undo-auto--remove-buffer-from-changed-list)
+
 (defun undo-auto--add-boundary ()
   "Add an `undo-boundary' in appropriate buffers."
   (undo-auto--boundaries