> Few realise that JPEG was designed for flickery low resolution analogue CRTs and slow CPUs. To my knowledge, JPEG was initially considerably slow to decode w

> Few realise that JPEG was designed for flickery low resolution analogue CRTs and slow CPUs. To my knowledge, JPEG was initially considerably slow to decode with contemporary CPUs. For example a Usenet post in 1992 [1] stated that decoding "big" images like 800x600 takes 1--2 seconds, which was considered fast at that time. JPEG itself was eventually used as a basis of MPEG-1 video codec, so it couldn't be too slow but I'm not aware of other concrete performance concerns. [1] https://groups.google.com/g/comp.compression/c/oabAk3UibhU/m/7rwXkiuMvioJ https://groups.google.com/g/comp.compression/c/oabAk3UibhU/m...