This seems like a limitation that sits in a somewhat unusable place: For something simple and platform-specific (e.g. a HTTP transform) we can just use JS where the boot time perf makes up for the execution perf, and for something more serious like a full-fledged API 120ms should be more than enough time (and we can preemtively scale as long as we're not already at 0)
But we might be able to do even better than that by leveraging Wasm Components [1] and WASI 0.2 [2]. Using a VM guest based on Wasmtime, suddenly it becomes possible to run functions written in any language that can compile to Wasm Components — all using standard tooling and interfaces.
I believe the team has a prototype VM guest based on Wasmtime working, but they still needed a little more time before it’s ready to be published. Stay tuned for future announcements?
[1]: https://component-model.bytecodealliance.org/introduction.ht...
[2]: https://wasi.dev
I think this is really cool, and the library was just released on GitHub for anyone to try. I’m happy I got to help them write their announcement post — and I figured this might be interesting for folks here!