I think that you might be talking about pglite.dev when talking about wasm from my understanding, Wasm has a performance hit though from my understanding and unless one plans to run postgres on web.

on the other hand a static cross platform single binary Postgres binary doesn't really have any performance hit.

(anecdotally, Personally I would be interested for something like this existing and maybe even integrating it with golang embed. Some of my apps are full stack golang with sqlite backend all baked into a single static binary which I can run and be cross-compiled but I would like to have the same level of flexibility but with postgres as well hopefully)

Yes, I'm sure the WASM binary for PG has a big perf hit. If you are just using it for testing, it probably doesn't matter?

Why does the perf hit matter to you? Are you trying to run WASM binaries of PG in production? That seems like a terrible idea.