optimize all the jpg's for your (rails or other) application

image optimization instructions

 # This assumes you're using OS X, but should work on any linux-based system
 # These two find commands could be run as part of the asset packaging step...
 
 brew install jpegoptim
 # checkout disk usage before hand
 du -h -d 1 .
 # add -n to jpegoptim options to do a dry run
 find . -name "*.jpg" -exec  jpegoptim --strip-all {} \;
 
 brew install optipng
 # use optipng takes a -simulate option for a dry run
 find . -name "*.png" -exec  optipng  {} \;
 
 # check optimized disk usage
 du -h -d 1 .
 # profit!