Hi Sebastian, Sebastian Fischmeister writes: > Hi, > > For some time already I experience a slowdown of the emacs notmuch interface over time. After using emacs with notmuch for a day or two, loading the inbox tree view (a search on tag:inbox) takes a significant amount of time to build the view. When I quite and restart emacs, the view loads instantly again. > > Do you have any suggestions on how to debug this issue other than > removing all customizations? Unfortunately no, but I have observed this issue as well. What sometimes appeared to help is to manually trigger a garbage collection. I must admit that I have not suffered from this recently though and it might have disappeared when I added --8<---------------cut here---------------start------------->8--- (setq helm-ff-keep-cached-candidates nil) --8<---------------cut here---------------end--------------->8--- to my init.el to work around https://issues.guix.gnu.org/43406 In case you are using helm, you could give that a try. Cheers, Dan