| 1 | <p align="center">
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| 2 | <a href="https://swc-project.github.io/">
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| 3 | <img alt="babel" src="https://raw.githubusercontent.com/swc-project/logo/master/swc.png" width="546">
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| 4 | </a>
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| 5 | </p>
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| 6 |
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| 7 | <p align="center">
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| 8 | Make the web (development) faster.
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| 9 | </p>
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| 10 |
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| 11 | <p align="center">
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| 12 | <a href="https://www.npmjs.com/package/@swc/core">
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| 13 | <img alt="npm Downloads" src="https://img.shields.io/npm/dw/@swc/core">
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| 14 | </a>
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| 15 | <a href="https://crates.io/crates/swc_ecma_parser">
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| 16 | <img alt="undefined" src="https://img.shields.io/crates/d/swc_ecma_parser.svg?label=crates.io%20dowloads">
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| 17 | </a>
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| 18 | </p>
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| 19 | <p align="center">
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| 20 | <a href="https://travis-ci.com/github/swc-project/swc">
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| 21 | <img alt="Travis Status" src="https://img.shields.io/travis/swc-project/swc/master.svg?label=travis&maxAge=43200">
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| 22 | </a>
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| 23 | <a href="https://codecov.io/gh/swc-project/swc">
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| 24 | <img alt="Coverage" src="https://codecov.io/gh/swc-project/swc/branch/master/graph/badge.svg">
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| 25 | </a>
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| 26 | </p>
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| 27 |
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| 28 | swc is a super-fast typescript / javascript compiler written in rust.
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| 29 |
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| 30 | # Documentation
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| 31 |
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| 32 | Check out the documentation [in the website](https://swc-project.github.io/docs/installation).
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| 33 |
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| 34 | # Features
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| 35 |
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| 36 | Please see [comparison with babel](https://swc-project.github.io/docs/comparison-babel).
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| 37 |
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| 38 | # Performance
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| 39 |
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| 40 | The lower bound of the speedup compared to babel is **18**. The benchmarks were run on Macbook pro, dual core, 2.3GHz Intel Core i5, 16 GB ram
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| 41 |
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| 42 | | | performance |
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| 43 | | ------------------ | :------------------------------------: |
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| 44 | | swc (es3) | 761 ops/sec ±0.23% (89 runs sampled) |
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| 45 | | swc (es2015) | 800 ops/sec ±1.02% (87 runs sampled) |
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| 46 | | swc (es2016) | 2123 ops/sec ±0.84% (88 runs sampled) |
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| 47 | | swc (es2017) | 2131 ops/sec ±1.13% (90 runs sampled) |
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| 48 | | swc (es2018) | 2981 ops/sec ±0.25% (90 runs sampled) |
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| 49 | | swc-optimize (es3) | 712 ops/sec ±0.21% (86 runs sampled) |
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| 50 | | babel | 41.75 ops/sec ±8.07% (56 runs sampled) |
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| 51 |
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| 52 |
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| 53 | <h2 align="center">Supporting swc</h2>
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| 54 |
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| 55 | <p align="center">
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| 56 | <a href="#backers">
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| 57 | <img alt="Backers on Open Collective" src="https://opencollective.com/swc/tiers/backer/badge.svg?label=backer&color=brightgreen" />
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| 58 | </a>
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| 59 | <a href="#gold-sponsors">
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| 60 | <img alt="Gold sponsors on Open Collective" src="https://opencollective.com/swc/tiers/gold-sponsors/badge.svg?label=Gold%20sponsors&color=brightgreen"/>
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| 61 | </a>
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| 62 | <a href="#silver-sponsors">
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| 63 | <img alt="Silver sponsors on Open Collective" src="https://opencollective.com/swc/tiers/silver-sponsors/badge.svg?label=Silver%20sponsors&color=brightgreen"/>
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| 64 | </a>
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| 65 | <a href="#bronze-sponsors">
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| 66 | <img alt="Bronze sponsors on Open Collective" src="https://opencollective.com/swc/tiers/bronze-sponsors/badge.svg?label=Bronze%20sponsors&color=brightgreen"/>
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| 67 | </a>
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| 68 | </p>
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| 69 |
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| 70 | swc is a community-driven project, and is maintained by a group of [volunteers](https://opencollective.com/swc#team). If you'd like to help support the future of the project, please consider:
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| 71 |
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| 72 | - Giving developer time on the project. (Message us on [Slack](https://swc-org.slack.com/) for guidance!)
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| 73 | - [Slackin for swc](https://swc-slackin.herokuapp.com)
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| 74 | - Giving funds by becoming a sponsor (see below)!
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| 75 |
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| 76 | ## Open Collective Sponsors
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| 77 |
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| 78 | Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://opencollective.com/swc#sponsor)]
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| 79 |
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| 80 | <h2 id="gold-sponsers" align="center">Gold Sponsors</h2>
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| 81 | <a href="https://opencollective.com/swc">
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| 82 | <img src="https://opencollective.com/swc/tiers/gold-sponsers.svg?avatarHeight=64">
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| 83 | </a>
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| 84 |
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| 85 | <h2 id="silver-sponsers" align="center">Silver Sponsors</h2>
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| 86 | <a href="https://opencollective.com/swc">
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| 87 | <img src="https://opencollective.com/swc/tiers/silver-sponsers.svg?avatarHeight=64">
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| 88 | </a>
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| 89 |
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| 90 |
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| 91 | <h2 id="bronze-sponsers" align="center">Bronze Sponsors</h2>
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| 92 | <a href="https://opencollective.com/swc">
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| 93 | <img src="https://opencollective.com/swc/tiers/bronze-sponsers.svg?avatarHeight=64">
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| 94 | </a>
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| 95 |
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| 96 |
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| 97 | <h2 id="backers" align="center">Backers</h2>
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| 98 | <a href="https://opencollective.com/swc">
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| 99 | <img src="https://opencollective.com/swc/tiers/backer.svg?avatarHeight=64">
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| 100 | </a>
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| 101 |
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| 102 | [Become a backer](https://opencollective.com/swc#backer) and get your image on our README on Github with a link to your site.
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| 103 |
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| 104 | ## Contributing
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| 105 |
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| 106 | See [CONTRIBUTING.md](CONTRIBUTING.md). You may also find the architecture
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| 107 | documentation useful ([ARCHITECTURE.md](ARCHITECTURE.md)).
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| 108 |
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| 109 | ## License
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| 110 |
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| 111 | swc is primarily distributed under the terms of both the MIT license
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| 112 | and the Apache License (Version 2.0).
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| 113 |
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| 114 | See LICENSE-APACHE and LICENSE-MIT for details.
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| 115 |
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| 116 | [babel]: https://github.com/babel/babel
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| 117 | [closure compiler]: https://github.com/google/closure-compiler
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| 118 | [rust]: https://www.rust-lang.org
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