Another wonderful article from Tim where he takes a look at the save-data header. Someone was worried that when people enabled save data that they’ll get a worse experience, but this shows ways that you can still maintain a great experience while still honouring your brand and you user’s preferences.
Often we serve high-resolution images to high-resolution screens. When the Save-Data header is enabled, we could instead serve up a lower resolution image by default.
If I pass the Save-Data header and reload the page, the site weighs 791kb, with 176kb of that being images. That’s a 12% drop in page weight. And visually, I frankly can’t tell the difference.An excerpt from Less Data Doesn’t Mean a Lesser Experience