AS-JSON

Probably the fastest JSON implementation for AssemblyScript with many more optimizations coming down the pipeline.

Installation

npm install json-as

npm install visitor-as --save-dev

For arbitrary-length numbers, use

npm install as-bignum

Add the transform to your asc command

--transform json-as/transform

Or, add it to asconfig.json

{
  "options": {
    "transform": ["json-as/transform"]
  }
}

Usage

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);

Notes

Performance exceeds JavaScript JSON implementation by an average of 230% but this decreases with larger data packets.

Planned Features

• Serialize
  • Objects
  • Other Types
  • Dynamic Types
• Deserialize
  • Objects
  • Other Types
  • Dynamic Types
• Streaming API
• Whitespace support
• Integrate features from SIMDJson
• Optimize
  • Strings
  • Int/Float
  • Bool
  • Object Serialization
  • Object Parsing
  • Arrays

Performance

Serialize Object (Vec3): ~11.1m ops/s

Deserialize Object (Vec3): ~3.2m ops/s

Serialize Array (int[]): ~1.4m ops/s

Deserialize Array (int[]): ~2.8m ops/s

Serialize String (5): ~4.2m ops/s

Deserialize String (5): ~12m ops/s

Issues

Please submit an issue to https://github.com/JairusSW/as-json/issues if you find anything wrong with this library