zenphoto-precache Jan 19, 2018
This python script will, when given correct paths and database information, iterate across all images in your zenphoto gallery and create cached thumbnails and other cached images for them, so it does not need to be done on the fly when the gallery is accessed.
It only caches needed sizes for the current theme and the admin theme, but you can use
--themes to specify additional themes you need to cache sizes for.
This extension is hosted and (hopefully maintnained) by its author.