Also jpegmini and kraken.io Anecdotally jpegmini's 'optically-lossless' algorythm seems to provide better results than the other options, but obviously ymmv.

Also jpegmini and kraken.io Anecdotally jpegmini's 'optically-lossless' algorythm seems to provide better results than the other options, but obviously ymmv. I'm super interested in this because i want to optimize in the region of 20k photos a day (don't ask :() and the PAYG options all work out relatively expensive with that kind of throughput, whilst mozjpeg is generally only saving us between 5% and 7% on the most-served images.