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Hm, so besides not having cross-site caching like ahoka mentioned, you can't even use some common fast CDN to host the compiled runtime.

It's more of a go problem than the wasm problem. Don't bundle such a big runtime and pass memory pointers around and you can have nice things.

Something beam-hosted with zero pointer sharing between nodes and smaller runtime maps to wasm much better.

It's also unfortunate for a lot of heavy JS libs out there that they can't be cached locally anymore, but security is important.

One WASM-related case I've actually encountered in the wild is Unity web. Similar problem as Golang, the runtime is heavy.