Akamai’s content delivery network (CDN) for static Lightning
components is now enabled in all new and existing communities. A CDN speeds up page load time by
storing cached versions in multiple geographic locations.
Where: This change applies to Lightning communities accessed through Lightning
Experience and Salesforce Classic in Essentials, Enterprise, Performance, Unlimited, and
Developer editions. This setting doesn't affect any version of the Salesforce app.
Lightning Component framework. It doesn’t distribute your org’s data or metadata in a CDN.
Lightning CDN is different than Communities CDN. See Set Up the Community Cloud Content Delivery
for more information.