How to escape the Linux networking stack

I had to read their article on "soft-unicast" before I could really grok this one: https://blog.cloudflare.com/cloudflare-servers-dont-own-ips-...

I'm slightly surprised cloudflare isn't using a userspace tcp/ip stack already (faster - less context switches and copies). It's the type of company I'd expect to actually need one.

Being a networking company I always wondered why did they pick Linux over FreeBSD.

SLATFATF - "So long and thanks for all the fish" is a Douglas Adams quote

https://en.wikipedia.org/wiki/So_Long,_and_Thanks_for_All_th...