Main constraint on the impl is that we don't want to foist a netstandard2.1 dependency on anyone - the codec may hence need to be a separate project/nuget - benchmarks with the memory store should make sense as a way of validating any potential raw perf improvement.

For Equinox.EventStore, the wiring should be straightforward

Wrt Equinox.Cosmos, this could become more messy due to the way in which the data is emitted (and how the DocDb client dll wants to manage its parsing)