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perf(utils): optimized reducer to avoid creating new objects #8818

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merged 1 commit into from
Oct 26, 2025
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perf(utils): optimized reducer to avoid creating new objects #8818

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10 changes: 5 additions & 5 deletions packages/vitest/src/utils/serialization.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -3,11 +3,11 @@
function cloneByOwnProperties(value: any) {
// Clones the value's properties into a new Object. The simpler approach of
// Object.assign() won't work in the case that properties are not enumerable.
return Object.getOwnPropertyNames(value).reduce(
(clone, prop) => ({
...clone,
[prop]: value[prop],
}),
return Object.getOwnPropertyNames(value).reduce<Record<string, any>>(
(clone, prop) => {
clone[prop] = value[prop]
return clone
},
{},
)
}
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