Essential Image Optimization
Addy Osmani’s ebook makes the case the image optimization is too important to be left to manual processes. All images need optimization and it’s the perfect job for automation.
I agree, of course. At the moment I’ve got a WordPress plugin + Cloudinary one-two punch helping out around here. Optimized images, served with a responsive images syntax, from a CDN that also handles sending the best format according to the browser, is quite a performance improvement.