I think ARCHIVE=single doesn't support Zip batch mode, so each file is added separately, instead of adding all files in a single operation, which is slower.
(Disabling Preferences / Zip & Other Archives / Zip Files / Use temporary file when copying to Zip files (safer but slower) may speed things up again, but also means archives can be corrupted if adding or modifying them fails half-way through.)
If it's something you do a lot, a script could probably be written to do the same as ARCHIVE=single via ARCHIVE on its own, with the "single" logic moved into the script instead.
Hi Leo, thanks for your help.
This parameter was already unchecked.
Doing a script is a good idea but I am not experimented enough
If someone with a big heart and magic code in fingers is reading this, his help would be appreciated !