[eru]

Have you benchmarked against Rust's rkyv, too?

[eliasdejong]

No, I have not benchmarked yet against other languages. Rkyv is Rust only.

One primary difference is that Rkyv does not support in-place mutation. So any modification of a message requires full reserialization, unlike Lite³.

[eru]

Rkyv supports a limited amount of in-place mutation. But not in general like your approach does.