wizard-engine VS js-compute-runtime

I think I would like the former syntax. Witness one of the several nested matching situations I run into:

https://github.com/titzer/wizard-engine/blob/master/src/engi...

This would be much, much better if Virgil had pattern matching on tuples of ADTs.

Congrats to the Wasmtime team on the 1.0 release!

I'm happy to see that more runtimes are maturing and getting use on production cases... I can't wait to see and show what the future entails for WebAssembly on both the server side and the browser!

Keep up the good work. Also I'd like to use this message to congratulate other runtimes that I'm excited about (apart from Wasmer, of course!): Wizard Engine [1], Wazero [2] and Lunatic [3].

The future is bright in Wasm land :)

[1] https://github.com/titzer/wizard-engine

[2] https://github.com/tetratelabs/wazero

[3] https://github.com/lunatic-solutions/lunatic

A classic "easy" thing that appears "hard": write a little bit of assembly. Note, a little bit[1].

Writing assembly, again, in small amounts, is exactly the kind of thing that is difficult to start, and fails spectacularly if you have little experience. Debugging is a pain. But you can totally get the hang of writing assembly, and as long as you are doing it for the right reasons (TM), it's justified, and heroic. The key is you need to write and debug a little at a time.

Case in point, I wrote an entire Wasm interpreter[2] in x86-64 asm over the past few months. I wrote it a little at a time, had lots of unit tests, and am working in an engine that was already working (with a slower interpreter).

[1] If you find yourself writing more than a few hundred assembly instructions in a sitting, you are going to fail. If you find yourself writing more than a few thousand assembly instructions, you have already failed.

[2] https://github.com/titzer/wizard-engine/blob/master/src/engi...

There are multiple JavaScript runtimes. SpiderMonkey is one example that has nothing to do with Node.js, see (js-compute-runtime)[https://github.com/fastly/js-compute-runtime].

We listened to the community feedback, filled in feature gaps, and addressed many bugs in the SDK. Not only that, we’ve also overhauled the SDK reference docs making it easier for you to know what’s supported and how to implement the features. All the Fastly specific features of the JS SDK now have interactive example applications in the documentation.

These are good questions! Here's some answers from the corner of the world I know best as a Wasmtime contributor at Fastly:

1. Spidermonkey.wasm is the basis of Fastly's JavaScript on Compute@Edge support. We have found it to be faster than QuickJS. The source code is here: https://github.com/fastly/js-compute-runtime.

2. Fastly Compute@Edge is built on wasmtime. You can develop web services for it in Rust, JS, and Go: https://developer.fastly.com/learning/compute/

3. Fastly's multi-tenant platform is closed source, but our single-tenant local development platform, which also uses wasmtime under the hood as well, is open source: https://github.com/fastly/viceroy. It isn't a big leap to make viceroy multi-tenant: Wasmtime provides everything you need, and all Viceroy would have to do is dispatch on e.g. HTTP host header to the correct tenant. Our multi-tenant platform is closed source because it is very specialized for use on Fastly's edge, not because the multi-tenant aspect is special.

btw. for what it's worth their javascript to wasm is opensource:

- https://github.com/fastly/js-compute-runtime

- https://github.com/tschneidereit/spidermonkey-wasi-embedding

and besides that it is slower than nodejs it is still plenty fast (no matter that it is not as fast as they want) btw. it's startup is faster than node. (maybe better pgo might help)