I'm trying to determine what my image processing workflow should look like. I know WordPress automatically resizes and compresses images to various different sizes on upload. I'm curious if it does any compression on the original image.
Since it's doing compression (as it should) on the smaller images, I wouldn't want to upload an already compressed JPEG to have it re-compressed on the smaller sizes. But, if it doesn't compress the original, I'll have much larger image file than necessary when someone goes to view the original.
I'm thinking the ideal workflow would be to upload a quality 100 JPEG to WordPress, have it resize and compress all of the smaller images using the full quality image, and then compress the original as well. Does anyone know if this is possible (or if this is what is being done already)?