We have some more comprehensive benchmarks at https://r-carissimi.github.io/wasure/, with fairly different results.

libsodium is very numeric operation heavy IIRC

What are the numbers in that table? Is higher better or is higher worse? How does fully native C compare? What options are you using?

Edit: ah, higher numbers are better. But that fact is hidden way down in a block of text behind a collapsed details view.