Remember to cover the basics, that is, what you expected to happen and what in fact did happen. You don't know how to make a good report? See
https://orgmode.org/manual/Feedback.html#Feedback Your bug report will be posted to the Org mailing list. ------------------------------------------------------------------------ Tangling a file with a lot of src blocks can get quite slow because write-region is called for each individual src block. On my machine it takes 8 seconds to tangle a file with 160 blocks of the same language. Tangling the file over tramp would probably take about 5 minutes. Perhaps it would be more optimal to only save each file at the end of src block extraction. Emacs : GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.22, cairo version 1.17.3) of 2020-08-28 Package: Org mode version 9.4.4 (9.4.4-elpa @ /home/miha/.config/emacs/elpa/org-20201222/)