Gzipping components is now pervasive, but it’s such an easy, big win that you should confirm your web server is sending compressed files. For scripts and CSS the savings are huge; less so for images, which should already be optimized.

Depending on the number of components on your site, the sizes of those components, and the geographic distribution of your users, it may be a big performance advantage to use a Content Delivery Network. CDNs serve data physically closer to your users, and can make sites much faster.