stafford williamslinks from March 2023
Vitest runs tests 3x slower than Jest with threads: true (default) setting discusses performance differences between Vitest and Jest, leading to the introduction of vmThreads pool in Vitest 0.34.0 to achieve comparable speeds while maintaining test isolation.
Since resolved.
Mark tests that test overall behaviour other tests expand on in more detail proposes improving Jest’s test output by allowing tests to be marked as dependent on others, helping focus on root causes when failures occur in test suites with overlapping assertions. Utlimately this was closed as not planned and --bail was suggested as an alternative.