Quote:
At Google, we care about giving users the best possible online experience, both through our own services and products and by contributing new tools and industry standards for use by the online community. That?s why we?re excited to announce Guetzli, a new open source algorithm that creates high quality JPEG images with file sizes 35% smaller than currently available methods, enabling webmasters to create webpages that can load faster and use even less data.
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https://research.googleblog.com/2017...urce-jpeg.html
https://github.com/google/guetzli
You either save BW or gain quality. The choice is yours