css.preprocessorMaxWorkers = true

[sapphi-red]

Making an issue here instead as I feel it's a bit off-topic from the PR (vitejs/vite#17728).

I saw this comment here.

test-vite-sass/vuetify/vite.config.ts

Lines 9 to 12 in 29411c8

	// it doesn't seem affect much
	// functions: {
	// '__force_no_worker()'() {}
	// },

Just in case, did you put css.preprocessorMaxWorkers = true? Otherwise, adding that won't change anything.

Example: https://github.com/vitejs/vite/blob/66bdb1d7b41e46b5361606ff3811bdad6f625bcc/playground/css/vite.config.js#L85

[hi-ogawa]

Good point. I think I've toggled it a few times, but probably not in this example.
I updated README.md to include the build time with and without preprocessorMaxWorkers. The changes looks like this:

• sass-embedded x modern 575ms -> 937ms (slower)
• sass x modern 2.75s -> 1.76s (faster)
• sass x legacy 3.42s -> 2.04s (faster)

sass improved as expected, but sass-embedded might be suffering overhead of each dart process.