@bep wrote:
Both. But since both Hugo and Gift is limited by that constraint**, there currently is no (known to me) progressive JPEG encoder written in Go (stdlib has a decoder). Which is unfortunate, and the reason is probably that “Google doesn’t need it”. I’ve been banking on that it should happen already, but …
** This is a little the same situation as with webp, where there also is not Go encoder/decoder. Google has one webp library written in C (or C++) which we, if we really really wanted it, could use. The same applies to progressive JPEGs, I assume – but it comes at a high cost.