maximize-iterator/dist/esm/maximizeIterator.js

Maximize the parallel calls of an iterator supporting asyncIterator interface

import worker from './worker.js';
export default function maximizeIterator(iterator, each, options, callback) {
    if (typeof each !== 'function') throw new Error('Missing each function');
    callback = typeof options === 'function' ? options : callback;
    options = typeof options === 'function' ? {} : options || {};
    if (typeof callback === 'function') {
        worker(iterator, each, options, callback);
        return;
    }
    return new Promise((resolve, reject)=>worker(iterator, each, options, (err)=>err ? reject(err) : resolve()));
}