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> I didn't know that a single request can actually have multiple round trips!

If you load something from a third-party origin (e.g. 23789dz89asd789s.cloudfront.something), then it can actually be a lot worse than that. DNS needs resolving, which can take quite a while, depending on if and where things are cached. Then you get a full TCP handshake (since TFO doesn't work for the first connection), a full TLS handshake and then you get to roundtrip your request(s).

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