refactor: replace os.cpus with os.availableParallelism (#4639)

vitest-dev · Dec 4, 2023 · f35e2c7 · f35e2c7
1 parent 43008fe
commit f35e2c7
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diff --git a/docs/config/index.md b/docs/config/index.md
@@ -1326,7 +1326,7 @@ Watermarks for statements, lines, branches and functions. See [istanbul document
 #### coverage.processingConcurrency
 
 - **Type:** `boolean`
-- **Default:** `Math.min(20, os.cpus().length)`
+- **Default:** `Math.min(20, os.availableParallelism?.() ?? os.cpus().length)`
 - **Available for providers:** `'v8' | 'istanbul'`
 - **CLI:** `--coverage.processingConcurrency=<number>`
 

diff --git a/packages/vitest/src/defaults.ts b/packages/vitest/src/defaults.ts
@@ -1,4 +1,4 @@
-import { cpus } from 'node:os'
+import os from 'node:os'
 import type { BenchmarkUserOptions, CoverageV8Options, ResolvedCoverageOptions, UserConfig } from './types'
 import { isCI } from './utils/env'
 
@@ -43,7 +43,7 @@ export const coverageConfigDefaults: ResolvedCoverageOptions = {
   reporter: [['text', {}], ['html', {}], ['clover', {}], ['json', {}]],
   extension: ['.js', '.cjs', '.mjs', '.ts', '.mts', '.cts', '.tsx', '.jsx', '.vue', '.svelte', '.marko'],
   allowExternal: false,
-  processingConcurrency: Math.min(20, cpus().length),
+  processingConcurrency: Math.min(20, os.availableParallelism?.() ?? os.cpus().length),
 }
 
 export const fakeTimersDefaults = {

diff --git a/packages/vitest/src/types/coverage.ts b/packages/vitest/src/types/coverage.ts
@@ -208,7 +208,7 @@ export interface BaseCoverageOptions {
 
   /**
    * Concurrency limit used when processing the coverage results.
-   * Defaults to `Math.min(20, os.cpus().length)`
+   * Defaults to `Math.min(20, os.availableParallelism?.() ?? os.cpus().length)`
    */
   processingConcurrency?: number
 }