I remember seeing "gcc/clang/cl -o blah.so/dll/dylib" for an UDF functions (various DBs), and then dlload/loadlibrary/etc it. Nothing new really, but avoids having a compiler, and maybe the `wasm` sandbox helps with security.

My only worry in all this (and wasm) in general is how well you can debug this later - be it interactive, or postmortem dump. I'm having my reservations, but would have to experiment and see.

So far the best integration I've seen between different languages/runtimes have been C++ / .NET (C#) and C++/CLI (e.g. their managed C++) - I can debug, step in, post-mortem debug without an issue.

I can't even do this properly with GoLang, and had mixed success with Python (+.pyd files).

Debugging (interactive, and post-mortem) is often overlooked, and thought about later.

But I'm all excited about wasm now :)