Yeah server-timing is one of the headers that sprang to mind when reading the proposal. Which really focuses the question, who is this data for and why should it be added to every request on the wire? Server-timing is useful because it provides information related to the performance of the request. That can help with spot debugging and/or beaconed back somewhere. In the reporting case, this might be sampled to provide some protection for the data aggregator. With this carbon header, who is anticipated to be processing it? So far we've heard it could be the client software, a site operator, or even a hop (by summing the received value with its own). If its just a header that hits a browser, what good is it in isolation? At TPAC 2022 there was discussion that overlaps this proposal[1]. Some of that discussion related to how a sizeable amount of energy is cobsumed by the user agent to request, receive, and process resources. There seems an opportunity to have more utility via a more joined up strategy than _just_ adding a single header about the server side. Cheers Lucas [1] - https://w3c.github.io/web-performance/meetings/2022/2022-09-TPAC/#h.u3vuybw1fxr3 On Tue, 11 Apr 2023, 19:20 , <gs-lists-ietf-http-wg@gluelogic.com> wrote: > On Tue, Apr 11, 2023 at 01:56:44PM -0400, Michael Sweet wrote: > > If we really want a short header name, why not just: > > > > CO2: <value> > > > > (our shed is a lovely shade now, isn't it?) > > > > WRT negotiation, I think adding a request header/value limits the > opportunistic value and adds a tiny bit more resource usage over just > sending it if you have it. > > > > > > > On Apr 11, 2023, at 1:34 PM, Greg Wilkins <gregw@webtide.com> wrote: > > > > > > > > > Really good idea to get some eco accounting into http. > > Server-Timing already exists for some metrics and might be extended > with a CO2 metric. > > https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Server-Timing > https://www.w3.org/TR/server-timing/ > > Cheers, Glenn > >
Received on Tuesday, 11 April 2023 19:40:44 UTC