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Thought it surprising that amazon.com uses fastly when they have their own cdn

Someone answered this yesterday. CloudFront is good for video and large download assets (plus very low margins) but not for images and smaller stuff which Fastly is much faster at:

https://www.streamingmediablog.com/2020/05/fastly-amazon-hom...

It is the edge control. You would be amazed how easy it is to do seemingly complicated things at scale if you can do them per request at the edge.

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