isntitvacant, I wrote a bit about how Extism works (& how that strategy performs!): https://dylibso.com/blog/how-does-extism-work/
(tl;dr: wasmtime is fast, our kernel uses wasm time’s linker, & as a result, we can transfer about 1.5GiB/s across the host/guest boundary — at about 4.7ns per 8 byte-function call on my M2 mac.)
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