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by cryptonector 2204 days ago
The fact that UDP involves much smaller PCBs than TCP alone will drive adoption of HTTP/3 because it will free up a fair bit of memory.

More availability of HTTP version gateways in load balancers and other reverse proxies is all that's needed, and that's coming along.
3 comments
moreati 2204 days ago
Protocol Control Block for anyone else wondering https://www.oreilly.com/library/view/tcpip-illustrated/02016...
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the8472 2204 days ago
You still need to keep your unacknowledged data buffered somewhere. If the kernel isn't holding it then it's in userspace.
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microcolonel 2204 days ago
More specifically no PCB, for UDP itself.
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cryptonector 2204 days ago
It's not nil. For "connected" UDP sockets, it's smaller than TCP's, but not nil because, well, buffers. And for non-connected UDP sockets there's still buffers. The main thing is that you can have much less buffer space because you might always be willing to drop packets. Ultimately you can have much lower memory pressure from those buffers and the smaller PCBs.
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