Multiple Workers

It is possible for a single Piscina pool to run multiple workers at the same time. To do so, pass the worker filename to run method rather than to the Piscina constructor.

To work with multiple workers using Typescript, check out multiple workers in one file.

index.js

"use strict";

const Piscina = require("piscina");
const { resolve } = require("path");

const pool = new Piscina();

(async () => {
  console.log(
    await Promise.all([
      pool.run({ a: 2, b: 3 }, { filename: resolve(__dirname, "add_worker") }),
      pool.run(
        { a: 2, b: 3 },
        { filename: resolve(__dirname, "multiply_worker") }
      ),
    ])
  );
})();

Here are the two worker files used in this example:

add_worker.js

"use strict";

module.exports = ({ a, b }) => a + b;

multiply_worker.js

"use strict";

module.exports = ({ a, b }) => a * b;

You can also check out this example on github.