Retina image compression draws debate

On the Filament Group blog, Scott Jehl has written about using extreme JPEG compression to deal with hi-res displays, without resorting to JavaScript workarounds. Based on a technique earlier outlined by Daan Jobsis, Jehl noted how with JPEG images, the compression makes a much larger difference than physical dimensions. By way of example, he showed a 400x300 pixel 95 kB JPEG at 90 per cent compression next to one with dimensions of 1024x768. The latter was scaled down but compression was set to zero, and the resulting output was 44 kB – half that of the 'non-Retina' original.

Jehl said he's “not sure it stands to replace the responsive image techniques currently in play”, but is “excited about its potential for complementing them”, and added that the proposed

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