> I haven't worked with pgzx, but it's possible that memory management is easier. Zig uses memory arenas, and so does Postgres. If one can map directly to the other, it would be a huge win.

Yes. This was indeed a great motivator for using Zig. It was quite easy to integrate Zig with the Postgres memory management. This way we can use the Zig standard library or other Zig libraries without a second thought. Another advantage is that in Postgres memory context cleanup and error handling are somewhat well integrated with each other. This gives us some peace of mind as almost any Postgres function you might want to use in your extension is likely to raise an exception.