It provides everything that you need to speed up your WordPress site (replacing several optimization plugins) and improves users’ website experience. A professional solution even for beginners! Swift Performance provides awesome API features, like Critical CSS, Minify scripts with API, Remote Cron, Remote Prebuild, Image Optimizer, and automatic updates.
It can optimize automatically CSS delivery. For this it will find and merge all embedded or inline CSS on the page, and merge them into one CSS file. In this merged CSS Swift Performance can easily manipulate things (shorten URLs, color codes, force font-display:swap etc), and also can generate critical CSS from it.