The benchmark doesn't make sense at all. The encoders under the test were set to the same JPEG quality numbers, but this is a completely meaningless metric, and

The benchmark doesn't make sense at all. The encoders under the test were set to the same JPEG quality numbers, but this is a completely meaningless metric, and JPEG quantization matrices were not even examined to ensure that the quality is objectively comparable. See my blog post from 2008 regarding this very issue: https://patrakov.blogspot.com/2008/12/jpeg-quality-is-meaningless-number.html https://patrakov.blogspot.com/2008/12/jpeg-quality-is-meanin...