web-worker

问题 Does anyone know an easy way to profile web workers in Chrome? I found this question from last year, but unfortunately the only provided answer didn't work. Is there any way to do this or am I just out of look? It seems like a rather large oversight that hinders web development if you can't even do profiling. 回答1: To profile Web Workers navigate to "Developer Tools -> Sources -> Workers" and enable the checkbox "Pause on start". Now, when you refresh the page, a popup window with an inspector

问题 I have an array on objects, meshes created with Three.js, that I want to do some operations in a web worker. So the questions is how do I post them to the worker? From what I understand there's something called transferable objects that uses something called ArrayBuffer but I can't find any info about how to convert my array of objects to that. Or is this perhaps not possible? 回答1: Unless your object is already in binary buffer format, there is not performance benefit in converting it into

问题 This is incredibly annoying.. I am wondering why the heck my changes aren't reflected as I notice that my JavaScript file for my Web Worker always gets loaded from cache: I have disabled the Cache and hitting Ctrl + F5 does not work either. How can I make sure that this file does not get loaded from cache? _worker = new Worker('js/toy-cpu.js'); 回答1: You could add a kind of version number, for example like this: _worker = new Worker('js/toy-cpu.js?v=' + new Date().getTime()); 回答2: If you are

问题 I'm trying to follow this answer https://stackoverflow.com/a/28213834/632224 to get some files hashed in browser, but when i replace "importScripts('http://crypto-js.googlecode.com/svn/tags/3.1.2/build/rollups/md5.js');"+ with something like "importScripts('path to local copy of md5.js');"+ i'm getting error InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable in blob line 1. Here is content of that blob: importScripts('path to local copy of md5.js')

问题 I have a simple Pixel pseudoclass that has .H() , .S() and .L() methods. I use these in image analysis - like this watermark detection: To get the objects out of ImageData, I just loop through the ImageData and create multi-dimensional array: //Get image data var id = ctx.getImageData(0, 0, canvas1.width, canvas1.height); //The Uint8 array var pixels = id.data; //Dimensions var length = pixels.length; var width = id.width; var height = id.height; //Create empty array for 2D data var pixels2D

问题 Say I have a web worker _worker, and I attach a listener to it like so: _worker.addEventListener('message', (event) => { window["test"] = event.data||"foo" }); Let's say I later conditionally attach another listener inside a promise like so: if (window["test"] === undefined) { _worker.addEventListener('message', (event) => { window["test"] = event.data || "foo"; resolve(window["test"]) }); } else { resolve (window["test"]); } Basically the first listener's job is to set window["test"] to the

问题 I m trying to download a large blob from a web worker. With Firefox and Chrome it's quite simple: url = URL.createObjectURL(oMyBlob); //Then i return the url to the main thread and go to it But according to this thread IE doesn't allow that, and we must use this: navigator.msSaveBlob(blob, defaultName); But navigator seems to not have access to msSaveBlob within a webworker... What's the best way then to download a Blob (~100MB) within an IE11 worker? 来源： https://stackoverflow.com/questions

问题 I want to import 2 scripts in webWorker by importScripts() as follows,but it failed to import. How to deal with it? self.importScripts('https://cdn.jsdelivr.net/npm/@tensorflow/tfjs'); self.importScripts('https://cdn.jsdelivr.net/npm/@tensorflow/tfjs-converter'); error figure 回答1: Currently, it is not possible to use the webgl implementation on web-worker, the offlineCanvas being an experimental features. However, it is possible to use the CPU backend. Here is an example of delegation to the

问题 I have a huge piece of code (compiled with Emscripten) running inside a web worker. The page kicks off a task in the worker with one postMessage, and when the worker is finished, it sends another postMessage back. Great. However, I have a new feature I'd like to add that requires me to pause the worker mid-execution, kick a message back to the browser via postMessage, wait for the user to submit a valid response via postMessage, and then finish execution. However, I can't figure out anything

问题 I have the following issue with Web Workers in JS. I have a heavy duty application doing some simulation. The code runs in multiple Web Workers. The main thread is running on a WebPage. But could also be a Web Worker, if it makes sense. Example: var myWebWorkers = []; function openWorker(workerCount){ for(var i = 0; i < workerCount; i++){ myWebWorkers[i] = new Worker('worker.js'); myWebWorkers[i].onmessage = function(e){ this.result = e.data; this.isReady = true; } } } function setWorkerData