Can you not return objects via to runTask? about piscina HOT 5 CLOSED

You can. runTask returns a Promise that resolves with the return value of the worker function.

so... if worker worker is:

module.exports = async () => return { a: 1, b: 2 };

then... const ret = await piscina.runTask() will return the object.

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I get a UnhandledPromiseRejectionWarning: DataCloneError: [object Object] could not be cloned. error ...

off piscina/dist/src/worker.js line 175

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That can happen if any of the values in your object can't be cloned. What kind of values do you have in there?

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nested object of strings and binary

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Without more detail there's not much we can do here. The objects transfered need to work with the structured clone algorithm or transferring will fail. There's nothing we can do in piscina to influence that as the requirements are set by node and v8

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