WebAssembly (Wasm) was created for pretty much the same reason it’s attractive for Nix: to allow JavaScript programs in web browsers to offload computationally expensive tasks to a more performant language.
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，详情可参考wps
References passed over the boundary are already passed by ownership by bindgen — but these handles grab the reference off the boundary table. Recall that our Into::into calls clone under the hood, so these are always safe to consume without breaking the JS handle!
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