[justusw]

Am I right to assume that Prettier runs single-threaded? I was never able to find an option to parallelize (and I assume it is paralellizable). Being able to speed up Prettier would improve my workflow by a lot.

[esprehn]

You can run it through jest:

https://github.com/keplersj/jest-runner-prettier

Or run it through eslint through jest (which is what we do):

https://github.com/jest-community/jest-runner-eslint

https://www.npmjs.com/package/eslint-plugin-prettier

Either way gets you parallelism from jest. Personally I like the approach of using jest for all the "match files and run actions" logic (tests, lint etc) and then eslint for all the kinds of linting and formatting.

We then configure VSCode to lint autofix on save and get a really nice experience.

[ajgrover]

There are third party options you could try like this one (no personal experience): https://github.com/microsoft/parallel-prettier

Alternatively, it’s pretty common to only run prettier on changed files using lint-staged or pretty-quick.