Eliminate render blocking assets Swift Performance not just minify and combine the CSS and javascript files, but it can create critical CSS on the fly for your pages. Innovative, super fast cache Swift Performance provide intelligent caching, you can cache AJAX requests and dynamic requests as well. Image Optimizer Swift Performance comes with a built-in image optimizer. You can losslessly compress your JPEG and PNG images, and improve your sites performance. CDN Support Swift Performance provides CDN support. You can specify a hostname what will be used for static resources. You can also set 3 different hosts for CSS, JS and for media files.