On: Real-world HTTP/2: 400GB of images per day

[MichaelGG]

If there's a way to tell it not to render until x% downloaded, sure. Otherwise slower connections see the low-q versions for a while and it can disconcerting. Either to some users or some PMs.

[xzyfer → MichaelGG]

This is correct. Visually completion will not be achieved until the entirety of the images within the viewport are downloaded.

However progressive jpegs could improve initial paint times. These are dynamic so each page would have it's own unique (although related) profile.