Image loading time

I already limit the images to 720x720 and Quality Eco when uploading to Cloudinary. This is completely automatic when uploading.
These are upload presets on your Cloudinary settings page. It requires some time to try them out.

When displaying the images I use an extension that also caches them to reduce data consumption. There you can also set a loading image.

DM me if you like to know more about default presets in detail.