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Work around os.cpus() returning an empty array on unsupported platforms #3095

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merged 5 commits into from Aug 27, 2022
Merged

Work around os.cpus() returning an empty array on unsupported platforms #3095

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478f4a9
Accommodate for os.cpus() bug
catink123 Aug 25, 2022
37d0d8a
Add comment and combine cases
novemberborn Aug 26, 2022
9ffa0b6
Merge branch 'main' into the-fix
novemberborn Aug 26, 2022
811a94d
Fix linting and link to Node.js issue
novemberborn Aug 26, 2022
5da9fe7
Merge remote-tracking branch 'origin/main' into the-fix
novemberborn Aug 26, 2022
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14 changes: 8 additions & 6 deletions lib/api.js
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Expand Up @@ -246,14 +246,16 @@ export default class Api extends Emittery {
}
}));

// Resolve the correct concurrency value.
let concurrency = Math.min(os.cpus().length, isCi ? 2 : Number.POSITIVE_INFINITY);
if (apiOptions.concurrency > 0) {
concurrency = apiOptions.concurrency;
}

// Resolve the correct concurrency value. Note that `os.cpus()` can return empty arrays on
// platforms not officially supported by Node.js. Use 1 as a minimum.
// See <https://github.com/nodejs/node/issues/38190>.
let concurrency = Math.max(1, os.cpus().length);
if (apiOptions.serial) {
concurrency = 1;
} else if (apiOptions.concurrency > 0) {
concurrency = apiOptions.concurrency;
} else if (isCi) {
concurrency = 2;
}

const deregisteredSharedWorkers = [];
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