Array file prototype using a worker

array_filter_in_worker.js

const workerpool = require('workerpool');
const pool = workerpool.pool({maxWorkers: 7});

//Define filter prototype for be used into a worker.
const filterWorker = (values,fnStr) => values.filter(eval(fnStr));

//Declare new prototype for array filter into a worker.
Array.prototype.filter = async function(fn){

  //Assign the operation in the worker.
  const result = await pool.exec(filterWorker, [this,fn.toString()]);

  pool.terminate();
  return result;

};
 

const run = async ()=>{

  const result = await [1,2,3,4,5,6,7,8].filter(e=>e==3);
  console.log('fin',result);

}

run();