I think the measure here is "information density on a physical surface". For example, someone commented on a 4x3 font for English: https://news.ycombinator.com/

I think the measure here is "information density on a physical surface". For example, someone commented on a 4x3 font for English: https://news.ycombinator.com/item?id=30046035 https://news.ycombinator.com/item?id=30046035. This allows you to put way more information on a pixel surface, but at the cost (at least to my eyes) of time spent reading, as this font is harder (at least to me) to read. Which I would compare to more efficient compression algorithm, that take more time to encode/decode. This could be used when storing information on a physical media, like a book or a microfilm.