Comment by shadowfaxRodeo

Hi Surma! fantastic article. You can save a lot of data switching to a lossless format as you said, and especially when using ordered dithering. Even if the color palette is quite large.

Error diffusion causes problems for certain color palettes, but usually results in a smaller image size.

I've made a tool for doing this: https://doodad.dev/dither-me-this, you can easily half the size of a jpeg by dithering it and exporting it as a png.