The frame encoder for AV1 would blow away anything we have now but there isn't a push to use it on images unfortunately. HN tends to dislike abuses of JS but o

The frame encoder for AV1 would blow away anything we have now but there isn't a push to use it on images unfortunately. HN tends to dislike abuses of JS but one of the coolest polyfills I've seen tricks browsers into using their video decoders to render WebP and other more modern image formats. Definitely worth looking into if you've got a lot of huge images