Xnview vs PS Save as JPG (Max.quality)

[xnrv]

Hello, out of curiosity - why JPGs (saved from PNGs) from Xnview are approx. 35% larger than saved from Photoshop (both are saved with maximum quality). What is the reason? Thanks

[user0]

different codec

[xnrv]

and why the more efficient one is not in Xnview?

[user0]

adobe's codec is proprietary and closed-source, but it isn't 'more efficient' - it's just different
https://photo.stackexchange.com/questio ... ops-0-12-q
https://jpegartifactgenerator.com/blog/ ... ings-guide

[xnrv]

thanks for explanation!

but it isn't 'more efficient'

-I'd disagree (especially with today's prices of hard disks. and besides textures size is very important in 3D rendering