wizer VS rune

> once by the wasm runtime to compile the rust-python wasm

I'm not sure what you mean by that. The runtime doesn't compile WASM, it simply executes it.

There are tools for dealing with interpreter runtime overhead this by pre-initalizing the environment like Wizer[0]. ComponentizeJS[1] uses it to pre-initialize the Spidermoney engine it packages to gain fast startup times (and you can then prune the initialization only code with wasm-opt). As techniques like ComponentizeJS are also being applied for a specific set of interpreted files, you can even prune parts of the interpreter that would never be used for that specific program. If you want to go even further you could record specific execution profiles and optimize further by those.

[0]: https://github.com/bytecodealliance/wizer

[1]: https://github.com/bytecodealliance/ComponentizeJS

Edge functions are typically run intermittently, with their runtime stopped to free up resources between runs. Therefore a big factor is startup and shutdown speed. Containers are pretty bad there. Deno is better, and WASM is unbeatable, especially with things like Wizer[0].

[0]https://github.com/bytecodealliance/wizer

I imagine startup cost could be amortized by something like wizer: https://github.com/bytecodealliance/wizer

There are security benefits to running each request in its own instance, as it helps prevent accidental leaking of state between requests. To avoid doing lots of expensive initializations, we have a tool called wizer which lets users run their program's initialization once, create a snapshot, and then use that snapshot to do fast startups that don't rerun the whole initialization each time.

See https://github.com/bytecodealliance/wizer for an implementation of this approach.

It should probably be named "Making JavaScript to startup fast on WebAssembly", since the runtime speed is not really improved by the approach they exposed.

Besides that I think Wizer [1] is both an elegant and a simple solution to speed up startup speed with Wasm.

[1] - https://github.com/bytecodealliance/wizer#using-wizer-as-a-l...

A similar project, for WebAssembly so with limited scope is this: https://github.com/bytecodealliance/wizer. And somehow similar but limited on LLVM IR a colleague worked on this for Cheerp (the compiler used here as backend): https://github.com/leaningtech/cheerp-meta/wiki/Cheerp-PreExecuter.

A Lisp, a weird dialect of Lisp, is not better than Lua. Why use Rune [0]?!

[0]: https://rune-rs.github.io/

This is what I based my comment on - https://github.com/rune-rs/rune/issues/444

Late start today as well. I really thought today would be the day that I'd have to abandon my goal of no heap allocations. But, luckily I had an arena allocator available that I could fairly easily adapt to store data on the stack. And with some tweaks we have today's solution:

I'd have given you bonus points for using a rust styled scripting language like rune but that's pretty neat still

As note about using rust syntax for scripting: https://rune-rs.github.io/

I know you said you don’t want to embed another language but IMO Rune is worth a consideration here. It can be a pretty thin abstraction over rust by passing native structs to scripts and calling methods on them. The syntax and semantics are very close to rust so it feels natural. https://github.com/rune-rs/rune

The biggest technical difference I'd say is that Rune uses a stack-based machine which makes adding deep C support somewhat obvious while Rhai performs AST walking to execute scripts.