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gRPC is based on the internal Stubby RPC system, and that works over HTTP/1.1 based on CONNECT and switching to raw TCP. That works well enough, but the HTTP/2 goodies are too good to pass up.

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And using HTTP/2 directly allows using HTTP/2-based load balancers and reverse proxies, which is a huge bonus.

Great context, thanks. I'm excited to start using it :)

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