Took forever to load.

Is this another example of a "free" Oreilly book for one of those products that everybody wants to believe in but always fails (ex. Neo4J?)

So far as I can tell, CDNs are a scam. If you use http/2 and serve everything off one IP, you get fast loading consistently. Every DNS lookup you add to a website is just another chance for the web browser to go out to lunch for 30 seconds.