It would be awesome to have a usage example for transforms that showed how to transform some code. I want to try implementing a custom decorator as a preprocessor macro (as hinted by the docs you can do) but I'm not sure where to start.

Hi there.
I'm new to WebAssembly and AssemblyScript ... I was looking to speed up JavaScript code and started to play around with it.

So I had a question:
I was playing with the Mandelbrot demo.
What I did is, I ported the code from the ts file, directly to the js file ... so I can calculate the mandelbot set either by the code in the compiled webassembly - or directly within the javascript code. I expected the webassmbly calculation to be (significantly?) quicker.

But actually these are my results:

Using Chrome: JavaScript Code ~ 530ms ... WebAssembly ~ 1000ms
Using Firefox: JavaScript Code ~ 580ms ... WebAssembly ~ 570ms
("limit" set to do 800 iterations. My PC is running windows, AMD Ryzen 9 3900X)

So it seems that in Chrome the WebAssembly version is half as fast as the normal JavaScript version ... in Firefox both version are at least equal in performance.

Is this expected? Or am I missing something?

Running the loader example results in

> @assemblyscript/[email protected] test
> node tests

Example 1:
/tmp/examples/loader/node_modules/@assemblyscript/loader/umd/index.js:174
      if (id !== STRING_ID) throw Error(`not a string: ${ptr}`);
                            ^

Error: not a string: 1056
    at __getString (/tmp/examples/loader/node_modules/@assemblyscript/loader/umd/index.js:174:35)
    at Object.<anonymous> (/tmp/examples/loader/tests/index.js:22:22)
    at Module._compile (node:internal/modules/cjs/loader:1254:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1308:10)
    at Module.load (node:internal/modules/cjs/loader:1117:32)
    at Module._load (node:internal/modules/cjs/loader:958:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:23:47

Node.js v18.15.0

Inspected examples here : https://github.com/AssemblyScript/examples

We have a web assembly SDK implemented in C++.

Want to be able to link AssemblyScript to to it.

So need to be able to call AssemblyScript from C++ & C++ from AssemblyScript.

Nothing fancy, simple types. Or C interface & can figure out from there.

Can we create examples per feature instead of examples per whatever? Because I need examples with simd and reference types (in future) but I can’t find it.

Also seems examples repo little bit not popular, can we make a monorepo with AS and examples for AS? It will be a self documentation for a project and also e2e tests or integration test, whatever you call it.

License?

Perhaps one of the more simpler requests of an example, which has a complicated solution. If WASI is implemented, this would be a call to fd_write. If they aren't, then this would be one hell of a "Hello, World!".

The build flags specified in the examples are incorrect for asc version 0.20.6.

Currently the build scripts use "-b output.wasm" and "-d build/optimized.d.ts"

The correct flags are "-o output.wasm" and "-b esm"

Here is a diff:

diff --git a/mandelbrot/package.json b/mandelbrot/package.json
index 5b6c6b9..5165d15 100644
--- a/mandelbrot/package.json
+++ b/mandelbrot/package.json
@@ -4,8 +4,8 @@
   "license": "Apache-2.0",
   "private": true,
   "scripts": {
-    "asbuild:untouched": "asc assembly/index.ts -b build/untouched.wasm -t build/untouched.wat --use Math=JSMath --runtime stub --importMemory --sourceMap --debug --measure",
-    "asbuild:optimized": "asc assembly/index.ts -b build/optimized.wasm -t build/optimized.wat -d build/optimized.d.ts --use Math=JSMath --runtime stub -O3 --importMemory --sourceMap --measure",
+    "asbuild:untouched": "asc assembly/index.ts -o build/untouched.wasm -t build/untouched.wat --use Math=JSMath --runtime stub --importMemory --sourceMap --debug --measure",
+    "asbuild:optimized": "asc assembly/index.ts -o build/optimized.wasm -t build/optimized.wat -b esm --use Math=JSMath --runtime stub -O3 --importMemory --sourceMap --measure",
     "asbuild": "npm run asbuild:untouched && npm run asbuild:optimized",
     "start": "npx serve"
   },

Trying to build and load the examples with a recent version of Chrome and Safari on macOS Monterey arm64 gives the following error in console.log:

LinkError: WebAssembly.instantiate(): Import #0 module="env" function="Math.log" error: function import requires a callable

I just followed the instruction guide to tet loader

but there was an error when I teste it

I still can't build game of life example. When running : npm run asbuild

I get the error :

> @assemblyscript/[email protected] asbuild
> npm run asbuild:debug && npm run asbuild:release


> @assemblyscript/[email protected] asbuild:debug
> asc assembly/index.ts --target debug

Fatal: Module::addMemory: 0 already exists

▌ Whoops, the AssemblyScript compiler has crashed during compile :-(
▌ 
▌ There is no stack trace. Perhaps a Binaryen exception above / in console?
▌ 
▌ > undefined
▌ 
▌ If you see where the error is, feel free to send us a pull request. If not,
▌ please let us know: https://github.com/AssemblyScript/assemblyscript/issues
▌ 
▌ Thank you!

I get a problem when trying to access an uninitialized wasmModule. I used the example given here. I was attempting to perform a synchronous instantiation.

It is not obvious how to use @assemblyscript/loader with the browser sdk example, I had to download the loader separately but I see there are some instantiate bits in the dist sources but they're not exported or I can't figure out how to do it.

It would be helpful if we had a full(but simple) e2e example where the compiled binary gets instantiated and used using the loader and maybe also show some passing data back and forth to give the user a head start.