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perf: avoid fetchModule roundtrip if the module is cached #9075

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Merged
sheremet-va merged 2 commits into from
Nov 21, 2025
+6 −0
Merged

perf: avoid fetchModule roundtrip if the module is cached #9075

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b0b1e71
perf: avoid fetchModule roundtrip if the module is cached
sheremet-va Nov 21, 2025
86bc49d
chore: return cached after the mocker check
sheremet-va Nov 21, 2025
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6 changes: 6 additions & 0 deletions packages/vitest/src/runtime/moduleRunner/startModuleRunner.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -128,6 +128,12 @@ export function startVitestModuleRunner(options: ContextModuleRunnerOptions): Vi
return { externalize: toBuiltin(rawId), type: 'builtin' }
}

// if module is invalidated, the worker will be recreated,
// so cached is always true in a single worker
if (options?.cached) {
return { cache: true }
}

const otelCarrier = traces?.getContextCarrier()
const result = await rpc().fetch(
id,
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