Since it's a pure function, you can even keep using the legacy C code while still putting it in a sandbox: compile to WASM, then AOT transform to native code, a

Since it's a pure function, you can even keep using the legacy C code while still putting it in a sandbox: compile to WASM, then AOT transform to native code, and now it runs in the WASM sandbox at practically-native speed. https://hacks.mozilla.org/2021/12/webassembly-and-back-again-fine-grained-sandboxing-in-firefox-95/ https://hacks.mozilla.org/2021/12/webassembly-and-back-again... (Of course, new code is preferred in Rust over C, for sure.)