This independent comparison finds WebP has a fairly narrow sweet spot for a certain type and dimension of photos where it is ~9% smaller than JPEG.

For other types and sizes it is on-par.. or larger?

siipo.la/blog/is-webp-really-b

Interesting correlations (and lack thereof) between "Save Data" preferences and various national socio-economic statistics, income distribution, cost of bandwidth, device, and connectivity type.

Also, data is really cheap in India! … and in most of Europe; whilst insanely expensive in the US, topped only by Canada and the Cayman Islands.

simonhearne.com/2020/save-data

Videos from the Web Performance track by Wikipedia at FOSDOM are up at:

wikimedia.github.io/fosdem20we

The conference took place Feb 1st in Brussels.

Timo Tijhof's choices:

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