Benchmarks for type decoding

[dvdplm]

It would be good to have a few benchmarks for decoding types from JSON, perhaps taking inspiration from resolver::tests::should_get_types_from_json and other slow/heavy duty tests. Ideally we should run the benches in CI and store the results to check for regressions (fine to do in separate PRs though).

[jsdw]

Just to clarify, do you mean benchmarks decoding from SCALEd bytes to Value's? (It would be nice to have those for sure!)

Or are you thinking more about the legacy versions of desub which decode type information from the JSON files?

[dvdplm]

I meant both really!