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https://github.com/planttheidea/fast-stringify
A blazing fast stringifier that safely handles circular objects
https://github.com/planttheidea/fast-stringify
Last synced: about 2 months ago
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A blazing fast stringifier that safely handles circular objects
- Host: GitHub
- URL: https://github.com/planttheidea/fast-stringify
- Owner: planttheidea
- License: mit
- Created: 2018-06-02T13:47:19.000Z (over 6 years ago)
- Default Branch: master
- Last Pushed: 2024-03-28T17:33:26.000Z (6 months ago)
- Last Synced: 2024-07-18T21:17:45.691Z (2 months ago)
- Language: TypeScript
- Homepage:
- Size: 2.53 MB
- Stars: 51
- Watchers: 7
- Forks: 3
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE
Awesome Lists containing this project
- awesome-blazingly-fast - fast-stringify - A blazing fast stringifier that safely handles circular objects (TypeScript)
README
# fast-stringify
A tiny, [blazing fast](#benchmarks) stringifier that safely handles circular objects
## Table of contents
- [fast-stringify](#fast-stringify)
- [Table of contents](#Table-of-contents)
- [Summary](#Summary)
- [Usage](#Usage)
- [stringify](#stringify)
- [Importing](#Importing)
- [Benchmarks](#Benchmarks)
- [Simple objects](#Simple-objects)
- [Complex objects](#Complex-objects)
- [Circular objects](#Circular-objects)
- [Special objects](#Special-objects)
- [Development](#Development)
## Summary
The fastest way to stringify an object will always be the native `JSON.stringify`, but it does not support circular objects out of the box. If you need to stringify objects that have circular references, `fast-stringify` is there for you! It maintains a very similar API to the native `JSON.stringify`, and aims to be the most performant stringifier that handles circular references.
## Usage
```javascript
import stringify from 'fast-stringify';
const object = {
foo: 'bar',
deeply: {
recursive: {
object: {},
},
},
};
object.deeply.recursive.object = object.deeply.recursive;
console.log(stringify(object));
// {"foo":"bar","deeply":{"recursive":{"object":"[ref=.deeply.recursive]"}}}
```
#### stringify
```ts
type StandardReplacer = (key: string, value: any) => any;
type CircularReplacer = (key: string, value: any, referenceKey: string) => any;
function stringify(
value: any,
replacer?: StandardReplacer,
indent?: number,
circularReplacer: CircularReplacer,
): string;
```
Stringifies the object passed based on the parameters you pass. The only required value is the `object`. The additional parameters passed will customize how the string is compiled.
- `value` => the value to stringify
- `replacer` => function to customize how the non-circular value is stringified (see [the documentation for JSON.stringify](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) for more details)
- `indent` => number of spaces to indent the stringified object for pretty-printing (see [the documentation for JSON.stringify](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) for more details)
- `circularReplacer` => function to customize how the circular value is stringified (defaults to `[ref=##]` where `##` is the `referenceKey`)
- `referenceKey` is a dot-separated key list reflecting the nested key the object was originally declared at
## Importing
```javascript
// ESM in browsers
import stringify from 'fast-stringify';
// ESM in NodeJS
import stringify from 'fast-stringify/mjs';
// CommonJS
const stringify = require('fast-stringify');
```
## Benchmarks
#### Simple objects
_Small number of properties, all values are primitives_
| | Operations / second | Relative margin of error |
| -------------------------- | ------------------- | ------------------------ |
| **fast-stringify** | **598,072** | **0.59%** |
| fast-json-stable-stringify | 339,082 | 0.86% |
| json-stringify-safe | 333,447 | 0.46% |
| json-stable-stringify | 255,619 | 0.71% |
| json-cycle | 194,553 | 0.60% |
| decircularize | 141,821 | 1.35% |
#### Complex objects
_Large number of properties, values are a combination of primitives and complex objects_
| | Operations / second | Relative margin of error |
| -------------------------- | ------------------- | ------------------------ |
| **fast-stringify** | **97,559** | **0.32%** |
| json-stringify-safe | 59,948 | 0.44% |
| fast-json-stable-stringify | 57,656 | 1.14% |
| json-cycle | 51,892 | 0.59% |
| json-stable-stringify | 39,180 | 1.01% |
| decircularize | 27,047 | 0.84% |
#### Circular objects
_Objects that deeply reference themselves_
| | Operations / second | Relative margin of error |
| ------------------------------------------ | ------------------- | ------------------------ |
| **fast-stringify** | **87,030** | **0.51%** |
| json-stringify-safe | 56,329 | 0.49% |
| json-cycle | 48,116 | 0.77% |
| decircularize | 25,240 | 0.68% |
| fast-json-stable-stringify (not supported) | 0 | 0.00% |
| json-stable-stringify (not supported) | 0 | 0.00% |
#### Special objects
_Custom constructors, React components, etc_
| | Operations / second | Relative margin of error |
| -------------------------- | ------------------- | ------------------------ |
| **fast-stringify** | **24,250** | **0.38%** |
| json-stringify-safe | 19,526 | 0.52% |
| json-cycle | 18,433 | 0.74% |
| fast-json-stable-stringify | 18,202 | 0.73% |
| json-stable-stringify | 13,041 | 0.87% |
| decircularize | 9,175 | 0.82% |
## Development
Standard practice, clone the repo and `npm i` to get the dependencies. The following npm scripts are available:
- `benchmark` => run benchmark tests against other equality libraries
- `build` => build dist files with `rollup`
- `clean` => run `clean:dist` and `clean:mjs` scripts
- `clean:dist` => run `rimraf` on the `dist` folder
- `clean:mjs` => run `rimraf` on the `mjs` folder
- `copy:mjs` => copy and transform the ESM file generated by `dist` to be consumable as an `.mjs` file
- `dev` => start webpack playground App
- `dist` => run `clean`, `build`, and `copy:mjs` scripts
- `lint` => run ESLint on all files in `src` folder (also runs on `dev` script)
- `lint:fix` => run `lint` script, but with auto-fixer
- `prepublishOnly` => run `lint`, `typecheck`, `test:coverage`, and `dist` scripts
- `release` => run `release-it` for standard versions (expected to be installed globally)
- `release:beta` => run `release-it` for beta versions (expected to be installed globally)
- `start` => run `dev`
- `test` => run Jest with NODE_ENV=test on all files in `__tests__` folder
- `test:coverage` => run same script as `test` with code coverage calculation
- `test:watch` => run same script as `test` but keep persistent watcher
- `typecheck` => run TypeScript types validation