WordPress blog owners can install the free WordPress plugin WP-Smush.it that uses Yahoo’s Smush.it service to reduce the size of images. The plugin works automatically in the background: It sends all uploaded images to Yahoo’s image compression service and uploads that optimized version to the server, instead of the unoptimized original version.
via Reduce Page Loading Time With WP-Smush.it For WordPress Blogs.
Smush.it definitely looks like an interesting service to quickly optimize your page loading speeds with shrunken images. However, it’s a pity you can’t perform a batch optimization for multiple images within the plugin although there is a roundabout way of doing it.
Adding another WP plugin, along with the added server load, is not necessarily the answer.
Here’s a simple, offline solution that will work at least as well as a smish.it plugin and perhaps better:
http://luci.criosweb.ro/riot/
RIOT will process your pictures in a number of ways. I use it every day and it’s superior to any software-based processing as I have full control over the quality of the output.
It also has a batch function to process a folder of pictures at once.
Don’t add to server load if there’s a good solution offline.