Re: [Cbor] Record proposal
Kris Zyp <kriszyp@gmail.com> Wed, 17 November 2021 15:16 UTC
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From: Kris Zyp <kriszyp@gmail.com>
Date: Wed, 17 Nov 2021 08:16:04 -0700
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To: Carsten Bormann <cabo@tzi.org>
Cc: Christian Amsüss <christian@amsuess.com>, cbor@ietf.org
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Subject: Re: [Cbor] Record proposal
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I have updated my tag registration proposal/submission at https://github.com/kriszyp/cbor-records to use 1+2 tag entries, which hopefully makes this a much less intrusive registry entry. I have also updated the proposed tag definitions to also support up-front declaration of a set of record structure definitions for a data item ("around" that data item, like the packed approach, as you suggested), in addition to the current inline record definitions (which can be scoped with record definitions and should follow a well-specified order for when they can be referenced by subsequent references). I hope this offers flexibility for encoders that have all structures known a-priori and streaming encoders (that do not), while still maintaining nearly the same mechanics for decoders. Let me know if you think this looks reasonable. Thank you! Kris On Thu, Nov 11, 2021 at 9:15 PM Kris Zyp <kriszyp@gmail.com> wrote: > > > Actually, stats would be very interesting. > > I was assuming that the 1+1 setup comes with a number of 1+2 referencing records, the hit from going to 1+2 there as well would be relatively insignificant. > > Number are better than assumptions! > > You are definitely right, using 1+2 tag for defining records is pretty > insignificant (around a quarter of percent in my tests). Anyway, I put > together some tests comparing CBOR packed, record structures, and > combinations with a couple test data structures, with my library, for > the sake of further comparisons: > https://gist.github.com/kriszyp/b623b85d2dc25ac9e3b07d8f39df9307 > > Anyway, seeing this, I am happy to go ahead and update my proposal to > use a 1+2 tag for defining records. And thinking about this, I don't > think my proposal necessarily even needs to mandate the tag ids used > for referencing records since those are dynamically assigned and > explicitly specified by the encoder itself (encoder obviously must not > conflict and use tag ids that will be used for other purposes), albeit > can encourage a certain range (presumably from the first-come > first-serve range). > > Do you have any preference for a tag id to use? It looks like 279 is > the next in the contiguous block, but sounds like choosing aesthetic > characters is the new preference (29299/"rs" perhaps). > > Anyway, thanks again for the helpful feedback, really appreciate it! > > Thanks, > Kris
- [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Christian Amsüss
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Christian Amsüss
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Emile Cormier
- Re: [Cbor] Record proposal Kris Zyp
- Re: [Cbor] Record proposal Emile Cormier
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Record proposal Emile Cormier
- Re: [Cbor] Record proposal Kris Zyp
- [Cbor] Request for reviewers for external documen… Christian Amsüss
- Re: [Cbor] Request for reviewers for external doc… Christian Amsüss
- Re: [Cbor] Record proposal Carsten Bormann
- Re: [Cbor] Request for reviewers for external doc… Christian Amsüss