You don't need a CDN
Many articles about building SharePoint Framework solutions mention uploading your files to a CDN. But are you sure you actually need one?
SharePoint framework
SharePoint Framework is a new development model for extending SharePoint to your need. Following articles offer you tips and considerations for extending SharePoint using the SharePoint Framework.
Presenting at Microsoft Ignite 2017
Interested in the SharePoint Framework? Join me at Microsoft Ignite 2017!
Build SharePoint Framework solutions for SharePoint Online and on-premises
Now that you can build SharePoint Framework solutions for both SharePoint online and on-premises, you need to decide which one you want to target.
Can users download your SharePoint Framework scripts as quickly as possible?
Serving your scripts as quickly as possible is necessary to get great performance of your SharePoint Framework customizations. So how good is your setup?
Optimize your SharePoint Framework files delivery for performance
Using the standard toolchain you can easily deploy your SPFx files to Azure. Here is what you should do next to load these files as quickly as possible.