Agreed. As a photographer, I use and love Guetzli, and it offers a bona fide size reduction of more than 30% over typical JPEG compression algorithms at a simil

Agreed. As a photographer, I use and love Guetzli, and it offers a bona fide size reduction of more than 30% over typical JPEG compression algorithms at a similar visual quality level. But it's extremely computationally-intensive, taking over a minute to compress a single web-resolution image on my i7 laptop. I can't see it being practical in a high-volume server scenario.