perf: reduce the number of unused imports #8508
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sheremet-va
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This was referenced Nov 3, 2025
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Description
This PR combines
worker.jsandworkers/*files together removing the need to have a dynamic import.It also removes
@vitest/utilsentry point, everything has to be imported from@vitest/utils/*for better performance.@vitest/utils/source-mapperformance was improved by inlining only used functions from@jridgewell/trace-mapping.The
tinyrainbowpackage was updated to v3 where I removed the check forisattythat took a few ms.With these changes I managed to shave of ~6ms of startup time. The main bottleneck at this point is just the sheer amount of code that we import during the startup.