rkyv and postcard seem to be very promising and have been in development for a little while now https://rkyv.org/ https://rkyv.org/ https://github.com/jamesmun

rkyv and postcard seem to be very promising and have been in development for a little while now https://rkyv.org/ https://rkyv.org/ https://github.com/jamesmunns/postcard https://github.com/jamesmunns/postcard postcard seems like it would be particularly strong for the wasm use case as it produces small messages that are light in memory.