JSON for AssemblyScript focused on performance, low-overhead, and ease-of-use.
npm install json-as
Add the transform to your asc
command (e.g. in package.json)
--transform json-as/transform
Alternatively, add it to your asconfig.json
{
// ...
"options": {
"transform": ["json-as/transform"]
}
}
import { JSON } from "json-as/assembly";
// @json or @serializable work here
@json
class Vec3 {
x!: f32;
y!: f32;
z!: f32;
}
@json
class Player {
firstName!: string;
lastName!: string;
lastActive!: i32[];
age!: i32;
pos!: Vec3 | null;
isVerified!: boolean;
}
const player: Player = {
firstName: "Emmet",
lastName: "West",
lastActive: [8, 27, 2022],
age: 23,
pos: {
x: 3.4,
y: 1.2,
z: 8.3
},
isVerified: true
};
const stringified = JSON.stringify<Player>(player);
const parsed = JSON.parse<Player>(stringified);
If you use this project in your codebase, consider dropping a star. I would really appreciate it!
Run or view the benchmarks here
Below are benchmark results comparing JavaScript, WAVM (WebAssembly Virtual Machine), and Wasmtime environments.
JavaScript Results
NodeJS v20.5.1 - TinyBench v2.5.0 (V8)
┌───────────────────────────┬───────────────┐
│ Task Name │ ops / sec │
├───────────────────────────┼───────────────┤
│ 'Stringify Object (Vec3)' │ '1,191,221' │
│ 'Parse Object (Vec3)' │ '897,759' │
│ 'Stringify Number Array' │ '1,552,255' │
│ 'Parse Number Array' │ '1,225,325' │
│ 'Stringify String' │ '1,761,011' │
│ 'Parse String' │ '80,845' │
└───────────────────────────┴───────────────┘
AssemblyScript Results
WAVM v0.0.0-prerelease - as-bench v0.0.0-alpha (LLVM)
┌───────────────────────────┬───────────────┐
│ Task Name │ ops / sec │
├───────────────────────────┼───────────────┤
│ 'Stringify Object (Vec3)' │ '6,270,322' │
│ 'Parse Object (Vec3)' │ '8,000,195' |
│ 'Stringify Number Array' │ '6,664,937' │
│ 'Parse Number Array' │ '6,557,357' │
│ 'Stringify String' │ '6,946,947' │
│ 'Parse String' │ '10,952,502' │
└───────────────────────────┴───────────────┘
Wasmtime v11.0.1 - as-bench v0.0.0-alpha (Cranelift)
┌───────────────────────────┬───────────────┐
│ Task Name │ ops / sec │
├───────────────────────────┼───────────────┤
│ 'Stringify Object (Vec3)' │ '2,038,684' │
│ 'Parse Object (Vec3)' │ '4,623,337' |
│ 'Stringify Number Array' │ '2,500,947' │
│ 'Parse Number Array' │ '2,959,180' │
│ 'Stringify String' │ '3,236,896' │
│ 'Parse String' │ '5,634,594' │
└───────────────────────────┴───────────────┘
Please submit an issue to https://github.com/JairusSW/as-json/issues if you find anything wrong with this library