How are these speeds possible?

Hi,

I have found a site that loads incredibly quickly using CloudFlare and I would like to know how they do it. Here is an example URL: https://colorlib.com/wp/construction-company-wordpress-themes/

If you run this through Pingdom speed tools you’ll see the page weight is 10MB (due to all the images) and yet the load time is under 0.5s. My question is: what kind of caching are they using to achieve this? Are they edge caching HTML maybe? Something else?

They are.

Though, for me it loads in about three seconds.

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