Consider using System.Reflection.Emit to generate per-type record and union cons/unconsers

[baronfel]

The FSharp.Reflection members are slow and allocate-y. It would be great to mimic the approach used in Tarmil/FSharp.SystemTextJson#15 to make these much faster/more useful.

[sungam3r]

@baronfel PR is welcome! As you can see I've already added dynamic code compilation to other destructurama projects:

• https://github.com/destructurama/by-ignoring/blob/master/src/Destructurama.ByIgnoring/ByIgnoring/DestructureByIgnoringPolicy.cs#L69
• https://github.com/destructurama/attributed/blob/master/src/Destructurama.Attributed/Attributed/AttributedDestructuringPolicy.cs#L101

[github-actions]

This issue was marked as stale since it has not been active for a long time