Parcel: Faster builds using Sucrase

[neilime]

🙋 feature request

Sucrase is about 20x faster than Babel. Here's one measurement of how Sucrase
compares with other tools on a large TypeScript codebase with 4045 files and
661081 lines of code:

             Time      Speed
Sucrase      2.928s    225752 lines per second
swc          13.782s   47966 lines per second
TypeScript   39.603s   16693 lines per second
Babel        52.598s   12569 lines per second

🤔 Expected Behavior

Use Sucrase instead of Babel

😯 Current Behavior

We are forced to use babel

💁 Possible Solution

Use a dedicated plugin instead of using babel.

💻 Examples

https://sucrase.io/
https://github.com/alangpierce/sucrase/tree/master/integrations/gulp-plugin

[mischnic]

Related: #2593

[mischnic]

With Parcel 2's architecture, swapping out the babel plugin for a custom sucrase/swc plugin should be very easy to do.

[Kenttleton]

Would love help if anyone is interested

npm: https://www.npmjs.com/package/parcel-plugin-sucrase
repo: https://github.com/digital-eclecticism/parcel-plugin-sucrase