[Feature]: Packed Encoding

[jonatino]

Is there an existing issue for this?

• I have searched the existing issues

Description

Looking to get packed encoding support added. I use CBOR to save cached OCR data

the file is around 8.6mb which is around 50% smaller than the JSON equivalent. Reading the cbor file in a hex editor shows a lot of stuff are repeated like field names/certain fields that repeat the same value over and over.

Packed encoding would be wonderful 😄

Acceptance Criteria

• Works
• Smaller file size

Suggestions for a technical implementation

No response

[raylu]

would love to be able to send packed CBOR to my frontend to decode with https://github.com/kriszyp/cbor-x#cbor-packing

[TheButlah]

Would love packed encoding. We are trying to use ciborium to communicate with a microprocessor and we need to use integer based field names, payloads are 10x smaller this way.

Additionally, integer based names are helpful for evolution of schemas over time - for example, take a look at how minicbor_derive works. By using integers for names, fields can be renamed in code without breaking binary compatiblity (much like protobufs/flatbuffers).