Content I pull in from a Document Library

This is just f.. slow..
Same site pulls in content from our own HTTPS server

Questions
Will using Microsofts CDN solution par our own HTTPS server speed?
from answer > Yes
My clients edit these HTML files using the built-in Office365 HTML Editor
Is this Editor available on the CDN as well?from answer > Not on the CDN,
original files remain in the Tenant library and sync to the CDN (update may take 15 minutes)
[also see comments in first answer]
CDN resources