I am using jpegoptim with cronjob to optimize (even with lossy) my JPG formatted images. I use the following command
find . -iname '*.jpg' -print0 | \
xargs -0 jpegoptim --max=90 --strip-all --preserve --totals
But even, when I test with GTMetrix or Google's tool, they are still marked as "lossless compressable".
I wonder how to manage that? Is there any other method or suggested lib that I could use to compress my images without lossless compression? I've read about libjpeg-turbo (http://www.libjpeg-turbo.org/) but I don't seem to find a way to execute it upon my images.
I appreciate for any suggestion and helps!
Thanks in advance!