--- Comment #1 from Tim Starling <tstarl...@wikimedia.org> ---
I think the idea is to postprocess the article HTML in MobileFrontend to
replace the img src attributes with ones that include a quality class
parameter. Obviously we want to keep the number of quality classes small for
optimal cache hit ratio -- I suggested two classes, Yuri suggested three. I
showed Yuri a few images scaled with various quality parameters. It seems that
for JPEG, ImageMagick -quality 30 is roughly what he is thinking, for a
I'm not sure how devices would be assigned to quality classes, or whether the
carrier would influence quality class choice. I suppose feature phones known to
lack support for 3G etc. would be given low quality images.
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