Can I get a link to the completely unoptimized original? Neither of the ones you posted appeared to be completely optimized. What options are you running jpegtran with?
It looks like imgur compressed one of them automatically. Here’s a link to the uncompressed image and compressed image:
https://www.dropbox.com/sh/bv2qbqambb8vtnx/hPDVqCyr18
I’m just running
jpegtran -optimize in.jpg out.jpg
The answer is metadata. I wasn’t aware of this, but the default behavior of jpegtran must strip metadata. When I turned on metadata stripping, it reduced the original to the same size as the other.
EDIT: should have mentioned that the default behavior of EWWW IO is to NOT strip metadata.
Running EWWW on the image shows that there is “No savings” . I have remove metadata set to Enabled, but it doesn’t seem to be detecting the difference in file sizes.
I also can’t seem to empty the database for the plugin. I even tried deactivating and deleting the plugin.
Either way, it certainly isn’t registering there’s optimizations to be made: http://i.imgur.com/8i782WS.png
Maybe this is related to my other ticket where Bulk Optimize doesn’t work?
I reran EWWW on a new version of the file:
Media Library ‹ Denimology — WordPress
Seems to work.
It seems EWWW is only having problems stripping metadata from files that have already been optimized.
Depending on how you are attempting to re-optimize the image, it may outright refuse to re-optimize the images. Using the bulk-tool, you must check the Force box to re-optimize. Otherwise, you can just click the Re-Optimize link on the Media Library, and that will send the ‘force’ parameter to the optimize function.
