>>105562751
When you use a quality parameter of 50 and a speed preset of 0 with AVIF, JXL will AT THE ABSOLUTE BARE MINIMUM require twice the file size to match the quality with clean anime screenshots. That said this is the low quality side of things and as you up the quality parameter for AVIF, the humiliation for JXL is reduced. It's just something about AVIF and large areas of uniform color that turns it into a demon of an image format.
That's why I made a thread yesterday where if AVIF were allowed on 4chan I'd go out of my way to make threads filled with dozens of anime screenshots encoded with speed preset 0 AVIF and since quality 50 is more of a meme thing I'd bump that up to 69 as well. Like I mean this IS a website centered around Anime and whatnot so it seems kind of absurd that AVIF isn't supported yet.