Optimize all jpg and png images in current directory and sub-directories recursively with imagemagick mogrify to google pagespeed spec.

optimize.sh

#!/bin/sh
find . -name '*.jpg' -execdir mogrify -sampling-factor 4:2:0 -strip -quality 85 -interlace JPEG -colorspace RGB -format jpg {} \;
find . -name '*.png' -execdir mogrify -strip {} \;