I am no expert at this at all, so I am wandering is there a difference in speed, etc. when using some subdomain (CNAME record) over the original address?
For example, when using CDN like Amazon S3. There is an option to set up custom domain alias, and create CNAME record that points to cloudfront address. So, is there difference in speed when using sub.domain.com that points to someString.cloudfront.net?
I understand the advantage of CNAME if you plan to change CDN provider, and you don't need to change links, but I am interested in speed.