WASM functions

[soamvasani]

Fission should add wasm as an environment runtime. This will allow multiple unrelated functions to be loaded into the same container. This will reduce cold-start times by a couple orders of magnitude. It will also allow each function invocation to be isolated from all other function invocations (a property you don't get today because we have to run multiple invocations of the same function within the same container).

Fastly open sourced lucet, an open source project compiler + runtime. This should give us pretty much everything we need, the remaining work is to write a thing that glues the compiler and runtime into our environment interface.

The compilation would go: {rust,c,AssemblyScript} -> wasm -> loadable binary. The loadable binary would get loaded and run by the lucent runtime.

[life1347]

Would you mind saying more about This will allow multiple unrelated functions to be loaded into the same container. ?

I'm a bit confused for the meaning of functions here, is that means 1) multiple fission functions
or 2) functions write in languages that support WASM and bundle them into one fission function?

If it's 1, how can achieve that? with multiple specializations?
If it's 2, how will builder work to build multiple lang functions into WASM?

[sanketsudake]

https://github.com/cloudflare/workerd
https://blog.cloudflare.com/workerd-open-source-workers-runtime/