web-worker

I've started tinkering with Node.js HTTP server and really like to write server side Javascript but something is keeping me from starting to use Node.js for my web application. I understand the whole async I/O concept but I'm somewhat concerned about the edge cases where procedural code is very CPU intensive such as image manipulation or sorting large data sets. As I understand it, the server will be very fast for simple web page requests such as viewing a listing of users or viewing a blog post. However, if I want to write very CPU intensive code (in the admin back end for example) that

I'm working on comparison for several different methods of implementing (real or fake) multithreading in JavaScript. As far as I know only webworkers and Google Gears WorkerPool can give you real threads (ie. spread across multiple processors with real parallel execution). I've found the following methods: switch between tasks using yield() use setInterval() (or other non-blocking function) with threads waiting one for another use Google Gears WorkerPool threads (with a plugin) use html5 web workers I read related questions and found several variations of the above methods, but most of those

How can angularJS use web workers to run processes in the background? Is there any pattern I should follow on doing this? Currently, I am using a service that has the model in a separate web worker. This service implements methods like: ClientsFacade.calculateDebt(client1); //Just an example.. In the implementation, this method sends a message to the worker with the data. This allows me to abstract the fact that it is being performed in a separate thread and I could also provide an implementation that queries against a server or even one that does this action in the same thread. Since I'm new

I'd like to generate images in a bit of asm.js code running on a web worker. And I'd like to regularly composite the latest state of that computation onto a user-visible 2d canvas, together with some other content. Currently I have code which constructs an ImageData object using its constructor , based on a portion of the array buffer used by the asm.js code, calls createImageBitmap to turn the ImageData into an ImageBitmap , transfers that image bitmap from the worker to the GUI thread and uses that ImageBitmap as an argument to CanvasRenderingContext2D.drawImage . Things work nicely in

I'm wondering if I can use jQuery inside the web worker file. Google Chrome gives me this error: "Uncaught ReferenceError: $ is not defined". Here is the code: The parent file: var loader = new Worker(BASE_URL + "js/rss_loader_worker.js"); // Ask the worker to start loading the RSS from the server loader.postMessage("loadRss"); // When receive the response from the server loader.onmessage = function (event) { console.log(event.data); } The worker file: onmessage = function (event) { if (event.data === "loadRss") { loadRss(); } } /** * This function handles the AJAX request to the server side *

Context: I have a web application that processes and shows huge log files. They're usually only about 100k lines long, but it can be up to 4 million lines or more. To be able to scroll through that log file (both user initiated and via JavaScript) and filter the lines with decent performance I create a DOM element for each line as soon as the data arrives (in JSON via ajax). I found this better for performance then constructing the HTML at the back-end. Afterwards I save the elements in an array and I only show the lines that are visible. For max 100k lines this takes only about a few seconds,