[CharlesW]

> These tools are no good for automatic lossy image compression

The self-promotion didn't bother me until this claim, because you posted some great advice along with it.

ImageOptim is great. If you choose "lossy minification" it does automatic lossy image compression, preserving perceptual image quality while making huge reductions to file sizes. Users can even adjust how aggressive it is.

I'll take your word for it that I could get 13-24% smaller file sizes with your Optimage product on top of the 80% (or whatever) that I can get with ImageOptim. But I'd prefer that you didn't claim that other choices are "no good".

[vladdanilov]

I specifically meant automatic lossy compression with predictable visual quality. If ImageOptim could actually achieve it (automatically), that would save me and others an awful lot of time. But as it turns out it is not that easy.

Some very smart people at Google go to the trouble of creating projects like Guetzli. I personally have spent months on this, and it gets me every time someone claims "just use that one tool" without any evidence. I presented mine and it's reproducible.

ImageOptim is a great tool otherwise.