I live in Australia, how is it that Stack Exchange is so fast without using any CDN?

I had a look at the Stack Exchange Servers:

https://meta.stackexchange.com/questions/10369/which-tools-and-technologies-are-used-to-build-the-stack-exchange-network

Seems they only have two data centres with 11 servers. There’s no mention of CDN, which I presume is not possible since they are using server side html rendering (ASP.Net).

Yet, I feel like they are as fast as google (which has a gazillion servers).
How is this possible?

Answer

They do use CDN. It’s at the moment Fastly: https://www.fastly.com/network-map.

Attribution
Source : Link , Question Author : user1034912 , Answer Author : d.c.

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