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Re: HTTP/3 options
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From: Daniel Stenberg via curl-library <curl-library_at_lists.haxx.se>
Date: Thu, 12 Jan 2023 22:55:58 +0100 (CET)
On Thu, 12 Jan 2023, Dmitry Karpov via curl-library wrote:
> Daniel, a question about the "Happy eyeballs everything!" section in the
> blog. Is the "happy eyeballs" interval between H3 and H2 going to be
> controlled by the same option as the interval between IPv6 and IPv4 or there
> will be a special option for that?
I imagine that we start out with a fixed mostly arbitrary delay that we think
works and then if someone insists and gives a good reason we make it an
option.
> I am asking because QUIC in H3 is supposed to provide a very quick
> connection start, so the HE interval between H3 and H2 can be made shorter
> than between IPv6 and IPv4, thus allowing faster switch to H2/H1 if UDP is
> blocked.
Sure, but we also have to accept that you might try a h3 request to an old
server on the other side of the globe via a slow network.
A 50-100 ms delay maybe?
Date: Thu, 12 Jan 2023 22:55:58 +0100 (CET)
On Thu, 12 Jan 2023, Dmitry Karpov via curl-library wrote:
> Daniel, a question about the "Happy eyeballs everything!" section in the
> blog. Is the "happy eyeballs" interval between H3 and H2 going to be
> controlled by the same option as the interval between IPv6 and IPv4 or there
> will be a special option for that?
I imagine that we start out with a fixed mostly arbitrary delay that we think
works and then if someone insists and gives a good reason we make it an
option.
> I am asking because QUIC in H3 is supposed to provide a very quick
> connection start, so the HE interval between H3 and H2 can be made shorter
> than between IPv6 and IPv4, thus allowing faster switch to H2/H1 if UDP is
> blocked.
Sure, but we also have to accept that you might try a h3 request to an old
server on the other side of the globe via a slow network.
A 50-100 ms delay maybe?
-- / daniel.haxx.se | Commercial curl support up to 24x7 is available! | Private help, bug fixes, support, ports, new features | https://curl.se/support.html -- Unsubscribe: https://lists.haxx.se/listinfo/curl-library Etiquette: https://curl.se/mail/etiquette.htmlReceived on 2023-01-12