stardiviner writes: > I have a large `org-tag-alist` value that contains about ~7000 tags. > When I press [C-c C-q] `org-set-tags-command`. Emacs suspends a long time. Indeed. That's because `org-fast-tag-selection' tries to put all those 7k tags into tag selection window. We can probably limit the maximum number of tags in the quick selection window. Can you try the attached simple diff for `org-fast-tag-selection' and check if it is enough to solve the hang?