web-worker

Workers JSNI at GWT svn It looks like WebWorkers have not been fully implemented yet. I know that elemental is in early stage of development but might be someone already have tried to make it works? The problem with web workers is that they don't really fit the standard GWT/Java model - in my opinion they barely fit the standard JS model. Web workers work by passing data back and forth between what are essentially different JavaScript VMs. That data must be in the form of a string, and each worker has to load its JS separately. This means that no variables declared in one worker (or the main

I'm writing a library for WebWorkers, and I want to test the difference between running a script in the main page thread, versus in one or more workers. The problem is: I can't find out of hand a short function which will strain my browser enough that I can observe the difference. A quick search didn't return much, but it might just be that I don't really know what to search for; usually I try to optimise my code, not make it slower... I'm looking for algorithms or patterns that can be easily implemented in pure Javascript, that do not depend on the DOM or XHR, and which can have an argument

I have an iOS application built using a UIWebView and HTML5 websockets. The app experiences seemingly random crashes. It has occurred while a user is interacting with it and during longevity tests where no interaction between user and app occurs. The crash logs all have the following: Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS at 0x00000000 and the thread logs contain: Thread XX name: WebCore: Worker Thread XX Crashed: 0 WebCore 0x36c8c7a0 WebCore::UserGestureIndicator::processingUserGesture() + 20 1 WebCore 0x36d7070a WebCore::DOMTimer::DOMTimer(WebCore:

The expected workflow of my code is getting the data from getData . getData calls the worker that will do ImageUtil.getHex on the input. ImageUtil.getHex is a heavy function that needs to iterate every pixel of an image area area , so that's why I want to create it runs in the background and done in multithreading. The function is also independent, which I guess is a good candidate to put in the worker. This is the chunk of code that needs the getData function: class Mosaic { // ... build() { for (let y = 0; y < canvas.height; y += options.tileHeight) { for (let x = 0; x < canvas.width; x +=

The code below runs perfectly if called from main javascript, but it does not run in the web worker. function getSpecData(detailLvl, startWeek, endWeek, mkt) { var params = { "detailLvl": detailLvl, "startWeek": startWeek, "endWeek": endWeek, "mkt": mkt }; var xhr; var url = "WebServices/wsSProgress.asmx/GetSpecProgressTable"; try { xhr = new XMLHttpRequest(); xhr.open('POST', url, false); xhr.setRequestHeader('Content-Type', 'application/json'); xhr.onreadystatechange = function () { if (xhr.readyState == 4 && xhr.status == 200) { var result = JSON.parse(xhr.responseText); $('#specProgTbl')

Is it possible to call a Shared Worker from the Web Worker? Could you please give me an example. In my case I have a few web workers and I need to share a singleton service between them. The SharedWorker constructor is not currently available within the WorkerGlobalScope , so you will not be able to construct an instance like you would in an iframe or window. What you can do is, create a MessageChannel for each of your workers, and use it to communicate between the worker and sharedWorker. Though doing this would negate the need for an actual SharedWorker , since you could just as well use a