web-worker

I have always thought that web workers create separate threads, but today I ran into the spec on w3c website. Below is a citation about web workers: This allows for thread-like operation with message-passing as the coordination mechanism. The question is - if it is thread-like , not actual thread what is an advantage(performance wise) of using this technology? Any help will be appreciated! Yes, web workers create actual threads (or processes, the spec is flexible on this). According to the Web Workers specification, when a worker is created the first step is: Create a separate parallel

(Using Sails.js) I am testing webworker-threads ( https://www.npmjs.com/package/webworker-threads ) for long running processes on Node and the following example looks good: var Worker = require('webworker-threads').Worker; var fibo = new Worker(function() { function fibo (n) { return n > 1 ? fibo(n - 1) + fibo(n - 2) : 1; } this.onmessage = function (event) { try{ postMessage(fibo(event.data)); }catch (e){ console.log(e); } } }); fibo.onmessage = function (event) { //my return callback }; fibo.postMessage(40); But as soon as I add any code to query Mongodb, it throws an exception: (not using

If I edit my web worker script and refresh the page, the web worker script is a cached version. I am reasonably confident it is not my webserver, because I can immediately load the latest copies of all other files, and even restarting the webserver does not fix the problem. It only loads the newest version of the web worker script if I reboot chrome, which is highly inefficient, needless to say! It doesn't fix it even if I restart chrome. Is there anything I can do to get around this? Your web server determines how cachable a given web resource is and the browser attempts to respect those

I am using ES2015 Import / Export modules. In my worker file, when I try to import functions like I normally do: worker.js import { a, b, c } from "./abc.js"; I get the error: SyntaxError: import declarations may only appear at top level of a module As I am exporting functions in my module 'abc.js', I am not sure how to use them using the old (& apparently on its way out) syntax: self.importScripts( "/app/abc.js" ); So, my question is, how do we use the new import module syntax with workers? Second question is, what does importScripts import into when it imports from a module in where is there

I am trying to initialize a Breeze manager inside a 'Web Worker'. RequireJs, knockout, q, breeze are being imported inside the worker. After a call to: EntityQuery.from('name').using(manager).execute() , the following error appears: Uncaught Error: Q is undefined. Are you missing Q.js? See https://github.com/kriskowal/q . A live preview is uploaded here http://plnkr.co/edit/meXjKa?p=preview (plunk supports downloading for easier debug). EDIT -- relevant code Worker.js importScripts('knockout.js', 'q.js', 'breeze.js', 'require.js'); define('jquery', function () { return jQuery; }); define(

I have a website that is heavy on CPU usage that I decide to port to web workers. I have followed this step by step tutorial: https://medium.com/@enriqueoriol/angular-with-web-workers-step-by-step-dc11d5872135 I have cloned this rep and made it seem identical: https://github.com/kaikcreator/angular-cli-web-worker I encountered a few issues where the document was not defined or the window. In these cases I tested on the github rep if its a problem with or with the module and it was the module so I removed them. Basically I have no error right now and the page simply doesn't display: I assume it