alt Hacker NewsQUIC does not work very well for use cases like machine-to-machine traffic. However most of traffic in Internet today is from mobile phones to servers and it is were QUIC and HTTP 3 shine.
For other use cases we can keep using TCP.
Replies
thickice • 07/31/2025
Why doesn't QUIC work well for machine-to-machine traffic ? Is it due to the lack of offloads/optimizations for TCP and machine-to-machine traffic tend to me high volume/high rate ?
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mort96 • 08/01/2025
I don't understand what you mean by "machine-to-machine" if a phone (a machine) talking to a server (a machine) is not machine-to-machine.
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Let me try providing a different perspective based on experience. QUIC works amazingly well for _some_ kinds of machine to machine traffic.
ssh3, based on QUIC is quicker at dropping into a shell compared to ssh. The latency difference was clearly visible.
QUIC with the unreliable dgram extension is also a great way to implement port forwarding over ssh. Tunneling one reliable transport over another hides the packer losses in the upper layer.