Lib.rs

› Parser implementations › swc_ecmascript
#ecma #ast #ecmascript #compiler #swc

swc_ecma_ast

Ecmascript ast

by 강동윤, David Sherret, Zimon Dai and 34 contributors

32 breaking releases

new 0.33.1 Oct 15, 2020
0.32.0 Sep 23, 2020
0.27.0 Jul 31, 2020
0.18.1 Mar 10, 2020
0.3.1 Nov 26, 2018

#353 in Parser implementations

Download history 1300/week @ 2020-06-28 1671/week @ 2020-07-05 1001/week @ 2020-07-12 1112/week @ 2020-07-19 1259/week @ 2020-07-26 1127/week @ 2020-08-02 1433/week @ 2020-08-09 1725/week @ 2020-08-16 1944/week @ 2020-08-23 1890/week @ 2020-08-30 1522/week @ 2020-09-06 774/week @ 2020-09-13 640/week @ 2020-09-20 1183/week @ 2020-09-27 1398/week @ 2020-10-04 1150/week @ 2020-10-11

5,590 downloads per month
Used in 23 crates (11 directly)

Apache-2.0/MIT

415KB
10K SLoC

babel

Make the web (development) faster.

npm Downloads undefined

Travis Status Coverage

Supporting swc

Backers on Open Collective Gold sponsors on Open Collective Silver sponsors on Open Collective Bronze sponsors on Open Collective

swc is a community-driven project, and is maintained by a group of volunteers. If you'd like to help support the future of the project, please consider:

  • Giving developer time on the project. (Message us on Slack for guidance!)
  • Slackin for swc
  • Giving funds by becoming a sponsor (see below)!

Open Collective Sponsors

Become a sponsor and get your logo on our README on Github with a link to your site. [Become a sponsor]

Gold Sponsors

Silver Sponsors

Bronze Sponsors

Backers

Become a backer and get your image on our README on Github with a link to your site.

Documentation

Check out the documentation in the website.

Features

Please see comparison with babel.

Performance

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

performance
swc (es3) 761 ops/sec ±0.23% (89 runs sampled)
swc (es2015) 800 ops/sec ±1.02% (87 runs sampled)
swc (es2016) 2123 ops/sec ±0.84% (88 runs sampled)
swc (es2017) 2131 ops/sec ±1.13% (90 runs sampled)
swc (es2018) 2981 ops/sec ±0.25% (90 runs sampled)
swc-optimize (es3) 712 ops/sec ±0.21% (86 runs sampled)
babel 41.75 ops/sec ±8.07% (56 runs sampled)

Contributing

See CONTRIBUTING.md. You may also find the architecture documentation useful (ARCHITECTURE.md).

License

swc is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).

See LICENSE-APACHE and LICENSE-MIT for details.

Dependencies

~1.8–2.6MB
~56K SLoC