Smush admin images to lower file size

[georgestephanis]

Yahoo has a great little website called smushit.com (or smush.it if you prefer) that uses 100% lossless compression methods to make images deliver the same quality in significantly less space.

For example, I ran the contents of the ~/wp-admin/images/ folder through it, and it shaved off 23.34% or 35.87 kb off the files.

Smaller files are always good!

Zip files attached with smushed images.

wp-includes/images folder compressed -- saving 34% or 11kb

Related: #17641

This came up in #13307 too.

it's the sorta obnoxious thing that if it's done too early in the release cycle, the smaller files will just get overwritten as changes happen, but too late in the cycle noone wants to do it as it's late in the cycle. I'm not sure from a workflow perspective if it's really a practical solution as a ticket-action, or if it should be more of a 'guidelines' of smushing images before attaching them to tickets and such -- or if trac could somehow auto-smush uploaded images?

Closed #19857 as a duplicate.

Commenting here as per: ​https://github.com/WordPress/WordPress/pull/5

Hey. I used an OSX app called ImageOptim which uses 'PNGOUT' library to crush the graphics.

I used the 'xtreme' setting which does 1000s of trials over the graphics with no visual changes.

Obviously, saving 150kb (multiplied by the bajillion worpress installs out there) is a significant saving.

Let's handle this in 3.5.

Discussed in IRC this afternoon (​https://irclogs.wordpress.org/chanlog.php?channel=wordpress-ui&day=2012-08-29&sort=asc#m54966).

Georgestephanis said, "This is something nacin's said before he'd rather have be an automated trigger in the repository using a tool like pngcrush, rather than using Yahoo's smushit API"

Nacin said, "I can ask bazza to add the script to ​http://code.trac.wordpress.org/browser/optimize-images. or batmoo".

Closed #21498 as a duplicate.

Done in [21980] - not sure if we should close as fixed or leave it open for an automated script (like bumpbot).

There will be an automated tool at some point, but we can close this out.

Can't we borrow the script from the wp.com themes repo?