Testing · Senior · Question 28 of 75

What is the trade-off between Vitest pools `threads` and `forks`?

✓Correct answer: Threads (worker_threads) are lighter; forks (child processes) are more compatible with native modules and process-level APIs
2Threads run in the browser, forks in Node.js
3There is no difference

Explanation

Vitest uses forks by default because some libraries break inside worker threads (e.g. segfaults with native addons).

Further reading

Vitest: Features ↗

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