I have been making Optimage which is currently the only tool that can automatically optimize images without ruining visual quality [1]. It is also the new state of the art in lossless PNG compression.
I have raised a number of issues [2] with this guide. It’s been over a year and they still have not been addressed [3].
I have raised a number of issues [2] with this guide. It’s been over a year and they still have not been addressed [3].
[1] https://getoptimage.com/benchmark
[2] https://github.com/GoogleChrome/essential-image-optimization...
[3] https://twitter.com/addyosmani/status/914207017589288960