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https://github.com/2fd/rregex

Rust Regex binding for Javascript
https://github.com/2fd/rregex

regex rust typescript

Last synced: 3 days ago
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Rust Regex binding for Javascript

Host: GitHub
URL: https://github.com/2fd/rregex
Owner: 2fd
License: apache-2.0
Created: 2021-12-02T01:58:15.000Z (about 3 years ago)
Default Branch: master
Last Pushed: 2024-12-30T19:23:10.000Z (12 days ago)
Last Synced: 2025-01-02T06:12:19.901Z (10 days ago)
Topics: regex, rust, typescript
Language: JavaScript
Homepage: https://rregex.dev
Size: 4.27 MB
Stars: 30
Watchers: 2
Forks: 3
Open Issues: 1
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

awesome-regex - rregex - Bindings for Rust's `regex`, a non-backtracking engine. (JavaScript regex libraries / Alternative regex builders and engines)

README

# rregex

A dependency-free WebAssembly build of [Rust Regex](https://docs.rs/regex/latest/regex/) for Javascript

![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/2fd/rregex/release.yml?branch=master) ![GitHub Release](https://img.shields.io/github/v/release/2fd/rregex) ![NPM Version](https://img.shields.io/npm/v/rregex)
[![JSR](https://jsr.io/badges/@rregex/rregex)](https://jsr.io/@rregex/rregex)

- [Why Rust Regex](#why-rust-regex)
- [Install](#install)
- [Supported Runtimes](#supported-runtimes)
- [API](https://tsdocs.dev/docs/rregex/latest)
- [`RRegex`](https://tsdocs.dev/docs/rregex/latest/classes/RRegex.html)
- [`RRegexSet`](https://tsdocs.dev/docs/rregex/latest/classes/RRegexSet.html)
- [`Match`](https://tsdocs.dev/docs/rregex/latest/types/Match.html)
- [`Captures`](https://tsdocs.dev/docs/rregex/latest/types/Captures.html)
- [`escape`](https://tsdocs.dev/docs/rregex/latest/functions/escape.html)
- [Benchmarks](#benchmarks)
- [Known Issues](#known-issues)

## Why Rust Regex

Rust has a powerful Regex library with a lot of features that don't exists en the standard `Regex` object

[See the official documentation](https://docs.rs/regex/latest/regex/#syntax) for more detail

## Install

```bash
# NPM
npm install rregex

# Yarn
yarn add rregex

# PNPM
pnpm add rregex

# Deno
deno add @rregex/rregex

# JSR
npx jsr add @rregex/rregex
```

## Supported Runtimes

This package includes builds for multiple runtimes

| Runtime | Import | version |
| ------------------ | ------------------------------------------------------- | ---------- |
| Node.js (esm) | `import { RRegex, RRegexSet } from 'rregex'` | `*` |
| Node.js (commonjs) | `const { RRegex, RRegexSet } = require('rregex')` | `*` |
| Deno | `import { RRegex, RRegexSet } from '@rregex/rregex'` | `>=1.10.8` |
| Bun | `import { RRegex, RRegexSet } from '@rregex/rregex'` | `>=1.10.8` |
| Cloudflare Workers | `import { RRegex, RRegexSet } from 'rregex/lib/cf.mjs'` | `>=1.10.8` |
| Browser | TODO | |
| Standalone | TODO | |

## Benchmarks

In general terms `rregex` is at least 1 order of magnitud slower than the native `RegExp` object, but still have a good performance. **Unless you required some of the features that `rregex` provides, you should always consider using the native `RegExp` object**

> Benchmarks are executed using [test/deno.bench.mjs](./test/deno.bench.mjs), and [test/node.bench.mjs](./test/node.bench.mjs)

### Email

| benchmark | time (avg) | iter/s |
| --------- | -------------: | ------: |
| RegExp | 342.91 µs/iter | 2,916.2 |
| RRegex | 7.27 ms/iter | 137.6 |

> summary: `RegExp` is 21.19x faster than `RRegex`

### IP

| benchmark | time (avg) | iter/s |
| --------- | ------------: | -------: |
| RegExp | 72.63 µs/iter | 13,767.7 |
| RRegex | 7.02 ms/iter | 142.5 |

> summary: `RegExp` is 96.59x faster than `RRegex`

### URI

| benchmark | time (avg) | iter/s |
| --------- | -------------: | ----------: |
| RegExp | 688.79 ns/iter | 1,451,825.0 |
| RRegex | 22.52 ms/iter | 44.4 |

> summary: `RegExp` is 32689.42x faster than `RRegex`

| benckmarks | benckmarks |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [![Simple IP](./img/rregex-vs-native_-simple-ip.png)](https://jsbenchmark.com/#eyJjYXNlcyI6W3siaWQiOiJlZl9VbGJvYThpRGNYeGM3VUl4YnMiLCJjb2RlIjoiREFUQS5tYXRjaCgnKD86KD86MjVbMC01XXwyWzAtNF1bMC05XXxbMDFdP1swLTldWzAtOV0pXFxcXC4pezN9KD86MjVbMC01XXwyWzAtNF1bMC05XXxbMDFdP1swLTldWzAtOV0pJykiLCJkZXBlbmRlbmNpZXMiOltdLCJuYW1lIjoiUmVnRXhwOiBJUCJ9LHsiaWQiOiI0QkxuZmtPd0p4ZTZhQ0NSVmpIOVUiLCJjb2RlIjoibmV3IHJyZWdleC5SUmVnZXgoXCIoPzooPzoyNVswLTVdfDJbMC00XVswLTldfFswMV0_WzAtOV1bMC05XSlcXFxcLil7M30oPzoyNVswLTVdfDJbMC00XVswLTldfFswMV0_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) | [![IP](./img/rregex-vs-native_-ip.png)](https://jsbenchmark.com/#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) |
| [![email](./img/rregex-vs-native_-email.png)](https://jsbenchmark.com/#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) | [![URI](./img/rregex-vs-native_-uri.png)](https://jsbenchmark.com/#eyJjYXNlcyI6W3siaWQiOiJlZl9VbGJvYThpRGNYeGM3VUl4YnMiLCJjb2RlIjoiREFUQS5tYXRjaCgnW1xcXFx3XSs6XFxcXC9cXFxcL1teXFxcXC9cXFxccz8jXStbXlxcXFxzPyNdKyg_OlxcXFw_W15cXFxccyNdKik_KD86I1teXFxcXHNdKik_JykiLCJkZXBlbmRlbmNpZXMiOltdLCJuYW1lIjoiUmVnRXhwOiBVUkkifSx7ImlkIjoiNEJMbmZrT3dKeGU2YUNDUlZqSDlVIiwiY29kZSI6Im5ldyBycmVnZXguUlJlZ2V4KFwiW1xcXFx3XSs6Ly9bXi9cXFxccz8jXStbXlxcXFxzPyNdKyg_OlxcXFw_W15cXFxccyNdKik_KD86I1teXFxcXHNdKik_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) |

> **Note:** In order to compare with native regex these benchmarks follow the [`mariomka/regex-benchmark`](https://github.com/mariomka/regex-benchmark) structure

## Known Issues

If you call `splitn(text, limit)` and the expected result length is equal to `limit - 1` the result will include an extra item `""`, this behavior does not happen if `limit` es greater. **`fixed at >=1.3`**

```ts
const regex = new RRegex(",");
expect(regex.splitn("a,b,c", 0)).toEqual([]);
expect(regex.splitn("a,b,c", 1)).toEqual(["a,b,c"]);
expect(regex.splitn("a,b,c", 2)).toEqual(["a", "b,c"]);
expect(regex.splitn("a,b,c", 3)).toEqual(["a", "b", "c"]);

// This result includes an unexpected extra item
expect(regex.splitn("a,b,c", 4)).toEqual(["a", "b", "c", ""]);
expect(regex.splitn("a,b,c", 5)).toEqual(["a", "b", "c"]);

expect(regex.splitn("abc", 0)).toEqual([]);
expect(regex.splitn("abc", 1)).toEqual(["abc"]);

// This result includes an unexpected extra item
expect(regex.splitn("abc", 2)).toEqual(["abc", ""]);
expect(regex.splitn("abc", 3)).toEqual(["abc"]);
```