/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 * @format
 */

'use strict';

const os = require('os');

module.exports = (workers: ?number) => {
  const cores = os.cpus().length;
  return typeof workers === 'number' && Number.isInteger(workers)
    ? Math.min(cores, workers > 0 ? workers : 1)
    : Math.max(1, Math.ceil(cores * (0.5 + 0.5 * Math.exp(-cores * 0.07)) - 1));
};