Lazy-loading images is one well-known win for site speed, and at present if you want to implement it in WordPress you have to choose among one of many subtly different plugin options.

If you or your client is working with web images and wondering about web image DPI guidelines, this article’s for you. It explains why DPI doesn’t matter for web images, and why pixel count does.

David wrote a really good article on WordPress site speed a few weeks ago. He also, casually, made WPShout a lot faster—up to an 89% desktop score on PageSpeed Insights, which is about as high as I’ve ever seen a WordPress site score.

I really love being able to set custom image sizes in WordPress. The power and flexibility this system opens up for building beautiful, easy-to-administer, performant websites is hard to overstate.

I’ve loved TinyPNG for a long time, but didn’t realize until quite recently that they’ve got a WordPress plugin. I just tried it on a client’s site, and it’s amazing: automatic lossless image compression for all .jpg and .png images uploaded through the Media uploader. That means that all your images are exactly the same, but have smaller filesizes.

We’ll be looking at some useful ways to display images on the page that you simply can’t get with the Visual editor alone.