Questions tagged [worker-thread]
The worker-thread tag has no usage guidance.
186
questions
29
votes
3
answers
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Node.js worker threads shared object/store
So, I was reading some stuff regarding Node.js and I was amazed when I came across Worker Threads.
Having threads in my opinion is a great plus especially if you combine it with shared memory access. ...
- 3,239
27
votes
1
answer
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views
When is better using clustering or worker_threads?
I have been reading about multi-processing on NodeJS to get the best understanding and try to get a good performance in heavy environments with my code.
Although I understand the basic purpose and ...
- 545
24
votes
1
answer
9k
views
Push vs Pull Queues on Google App Engine
So far, no one (not even the GAE docs) has been able to give me a really clear description of what the difference is between a push queue and a pull queue.
My understanding is that the Task Queue API ...
- 56.3k
22
votes
3
answers
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views
nodejs - DataCloneError: function () { [native code] } could not be cloned
I'm trying to spawn threads (using the new Nodejs module 'worker_threads') and pass to each of them a complex object which is the 'page' object of a Puppeteer browser.newPage() instance. I tried both ...
- 598
14
votes
1
answer
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views
Android: multiple intentservices or one intentservice with multiple intents?
I'm a little confused about intentService. The docs say that if you send an intentService multiple tasks (intents) then it will execute them one after the other on one separate thread. My question is -...
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10
votes
1
answer
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How to pass class instances with function through worker_thread.Worker to use function?
To contextualize, I would like to use class instances functions through a Worker Thread from NodeJS "worker_thread" module.
In one main.js file I declare a class and instanciate a new Worker ...
- 164
9
votes
6
answers
5k
views
Proper way to have an endless worker thread?
I have an object that requires a lot of initialization (1-2 seconds on a beefy machine). Though once it is initialized it only takes about 20 miliseconds to do a typical "job"
In order to prevent it ...
- 25k
9
votes
2
answers
3k
views
How do I create a direct communication channel between two worker threads in Node.js
Is there a way to create a direct communication channel using new MessageChannel between two worker threads? For Eg: There is a main thread P that I have created using the worker_thread API, which ...
- 10.8k
8
votes
2
answers
27k
views
C#, Event Handlers and Threading
I'm writing a little chat app, and I have this event handler:
void o_Typing(object sender, EventArgs e)
{
MessageBox.Show("Fired!");
this.Text = "Fired!";
}
o_Typing is a method in a class ...
user47322
8
votes
2
answers
7k
views
How to Prevent a Node.js 12 worker Thread from terminating immediately?
I have a Node.js application running an Express server and a worker thread that does something at regular intervals.
When the server is stopped, I need to clean up a connection to an external system ...
- 19.8k
7
votes
1
answer
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node worker_threads console.log comes after postMessage
node v10.16.3
I was running an worker_threads example from node official doc. I made some changes as want to test share variables. Here is an example
work-thread.js
const {
Worker,
isMainThread,...
7
votes
1
answer
15k
views
PostMessage from WorkerThread to Main Window in MFC
I have a MFC application, which has a worker thread, what I want to do is to post message from worker thread to the Main GUI thread to update some status messages on GUI. What I have done so far is ...
- 3,591
7
votes
2
answers
5k
views
Nodejs and Express, use res.send() from a worker thread
In Nodejs, using Express as a server, I offload a heavy computation onto a worker thread.
From the main application, I call the worker thread like this:
// file: main.js
const { Worker } = require("...
- 4,682
6
votes
1
answer
2k
views
When a workerThread is created in nodejs, does it utilize the same core in which nodejs process is running?
Let's assume i have a nodejs serverProgram with one api and it does some manipulations on the video file, sent via the http request.
const saveVideoFile=(req,res)=>{
processAndSaveVideoFile(); /...
- 4,843
6
votes
2
answers
2k
views
How worker threads works in Nodejs?
Nodejs can not have a built-in thread API like java and .net
do. If threads are added, the nature of the language itself will
change. It’s not possible to add threads as a new set of available
...
- 4,973
6
votes
1
answer
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Is there a way to safely bind texture using OpenGL in a worker thread of Qt GUI application?
I am currently working on a GUI software project for visualizing 3D scenes using Qt. The GUI allows user to load batches of 3D data files such as .obj with some .mtl support and .stl as well as 2D ...
- 1,432
6
votes
0
answers
2k
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[Nodejs - worker-threads]: Is there an option for the main thread to wait till all worker threads are done?
Is there an option by which we can make the main thread wait until all worker threads are done?
In the below code, mainThread.js simply creates workers.
The worker takes long time to execute.
In this ...
- 739
5
votes
1
answer
3k
views
Node.js multithreading: What are Worker threads and how does it work?
I always believed that JS was a single threaded language which makes it inefficient for CPU intensive tasks. I recently came across worker threads and how it solves this inefficiency problem by ...
- 1,004
5
votes
1
answer
3k
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How to share context between worker threads
I would like to create a worker thread in a node.js app and pass the current context to the new thread, so I would be able to access my variables and functions within the new thread, Is there is a ...
- 138
5
votes
1
answer
8k
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ERR_WORKER_OUT_OF_MEMORY in nodejs worker threads
I receive the error Error [ERR_WORKER_OUT_OF_MEMORY]: worker terminated due to reaching memory limit, when I try to run nodejs worker threads in resource constrained windows environment.
What is the ...
- 9,189
5
votes
3
answers
3k
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Scala, check if Actor has exited
in Scala 2.8 when I start actors, I can communicate via message passing. This in turn means that I can send the ultimate Exit() message or whatever I decide fits my protocol.
But how will I check if ...
- 8,435
5
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0
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843
views
Test worker thread with mocks
My Node application uses AWS SDK, and in order to mock it locally I am using Jest's manual mocks. Basically I am placing in __mocks__ folder barebone mock of AWS SDK that simulates methods I use - and ...
- 39.3k
5
votes
0
answers
4k
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worker.on('error') not working when unhandled rejection happens in the worker
worker.js
async function main() {
throw new Error('Bullocks!');
}
setTimeout(async () => {
await main();
}, 1000);
main.js
const { Worker } = require('worker_threads');
const worker = new ...
5
votes
1
answer
949
views
How to send message to multiple threads from another one?
I have a worker which creates MessageChannel and sends one of ports to main thread
// worker1.js
const { parentPort, MessageChannel } = require('worker_threads');
const { port1, port2 } = new ...
- 51
4
votes
2
answers
6k
views
node: bad option: --experimental-worker
I am trying to experiment with worker_threads in node.js.
const { Worker, isMainThread, parentPort } = require('worker_threads');
if (isMainThread) {
// This code is executed in the main thread ...
- 49
4
votes
1
answer
8k
views
Worker threads with ts-node
I am planning to have worker threads for socket.io rooms. I create a worker thread on the first connection to a room which then sets up firebase listeners.
Unfortunately. I have common imports in the ...
- 617
4
votes
1
answer
4k
views
Terminating a Worker thread from a Parent thread - MFC
I've just started with learning MFC and I'm writing one dialog based application for better understanding of Multi-Threading.
The main dialog has a progress bar, a Start button and a Cancel button.
...
- 100
4
votes
2
answers
249
views
Which of these functions is the more effective one?
When using the thread, 'invoke' is being used to avoid 'Cross Thread'(1)
but, sometimes 'timer object' is being used to avoid 'CrossThread' (2)
like this(for example)
public partial class Form1 : ...
- 78
4
votes
3
answers
1k
views
Shared worker working before packing app, but not working after (electron)
I have an electron app where I am trying to push some CPU intensive tasks to a worker thread. This works well when I start the app using npm start, but after packing the app (with electron-packager ...
- 189
4
votes
1
answer
1k
views
How many Worker Threads can be created at most?
In my tablet app I use many Fragments (of one class) next to eachother in one activity, and in this Fragment class I have:
public void onActivityCreated(Bundle savedInstanceState) {
super....
- 10.7k
4
votes
1
answer
461
views
Why is all of my output appearing before each brute-force attempt when attempting to crack an ethereum keystore wallet file in node.js
I found a post describing how to recover an Ethereum wallet keystore by guessing a single password, however, it uses node synchronous code, and I'm trying to convert it into asynchronous code so that ...
- 65
4
votes
0
answers
310
views
tsconfig paths in worker_threads
I'm spinning up some node workers and need each worker to pull code from a path expressed in tsconfig's paths compiler options. How do you configure worker to acknowledge paths from tsconfig?
here's ...
- 5,247
4
votes
0
answers
857
views
"Module did not self-register" error when trying to load bcrypt in worker thread
Sample project with issues: https://github.com/Suvitruf/bcrypt-child-process-crash-proof
const {Worker, isMainThread} = require('worker_threads');
if(isMainThread)
console.log("I'm ok, because I'...
3
votes
2
answers
8k
views
Is it possible to use Node worker threads to perform database inserts?
I recently read about Node's "worker_threads" module that allows parallel execution of Javascript code in multiple threads which is useful for CPU-intensive operations. (NOTE: these are not ...
- 152
3
votes
5
answers
9k
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403 Forbidden with php in worker mode. Only to php files from browser
First off let me start by saying that yes I have searched for this in google and in stackoverflow specifically, I have found many answers and tried them all. At this point I believe my only resource ...
- 1,496
3
votes
1
answer
908
views
Why Node.js spins 7 threads per process
When a Node.js process is spun up top command shows 7 threads attached to the process. What are all these threads doing? Also, as the load on the API increases, with the request handlers themselves ...
- 385
3
votes
4
answers
1k
views
Basic multi-threading questions in C#
I'm new to multithreading and I'm working on parallelizing an area in my application. I've read a number of posts on this site but I'm still confused as to the best way to approach my problem:
[1] In ...
- 1,915
3
votes
1
answer
16k
views
Can't resolve 'worker_threads' in create-react-app
I'm trying to use "worker_threads" in my react-app for some cpu-intensive works. but react-app can't find "worker_threads" in node.js library.
Here is my code:
const {Worker} = require('...
- 315
3
votes
2
answers
944
views
Boost Thread Specific Storage Question (boost/thread/tss.hpp)
The boost threading library has an abstraction for thread specific (local) storage. I have skimmed over the source code and it seems that the TSS functionality can be used in an application with any ...
- 20.3k
3
votes
0
answers
550
views
how to work with response object in nodejs stream, exceljs and worker thread
I am using worker thread and stream at same time in node JS project. At initial I was not able to pass res object through main process to worker thread. I saw many stackoverflow question and solution ...
3
votes
1
answer
831
views
In electron app, when I using worker_thread, an exception occurs after using Command+Q to exit the app
My code is very simple:
const { Worker } = require('worker_threads');
let script = `console.log('working...');`;
new Worker(script, { eval: true });
I can see working... output in the console, but ...
- 167
3
votes
1
answer
932
views
Passing my stream to a worker thread node.js
I have to implement this custom method of Multer storage in order to encrypt file before saving it.
I have implemented my function encrypt, which will comunicate with a worker thread.
import { ...
- 1,842
2
votes
8
answers
3k
views
How to prevent memory leaks while cancelling an operation in a worker thread?
Currently i am working on a desktop application which consists mathematical analysiss.I am using qt for GUI and project written in c++.
When user starts an analysis, i open a worker thread and start a ...
- 982
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votes
5
answers
6k
views
Is it possible to call the main thread from a worker thread in Java?
I have a method called action() that deploys three threads. Each deployed thread or worker thread falls into a while loop based on a single instance variable of type boolean being true, for example ...
- 1,213
2
votes
5
answers
7k
views
How can I tell if a thread is finished executing without polling ThreadState?
Is there an elegant way to know when a worker thread is done executing so I can access resources it produced?
For example if the worker thread queried a list of SQL Servers using
...
- 17.6k
2
votes
1
answer
1k
views
Does a worker thread need to sleep?
A normal worker thread runs in a loop in which it checks for available tasks in a queue and consumes them. I've seem some examples where the thread waits a couple of milliseconds when there is no ...
- 33.4k
2
votes
3
answers
2k
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How to pass user-defined data to a worker thread using IOCP?
Hey... I created a small test server using I/O completion ports and winsock.
I can successfully connect and associate a socket handle with the completion port.
But I don´t know how to pass user-...
- 2,304
2
votes
1
answer
2k
views
How to insert a new data in mongoDB using worker thread in nodejs
I want to insert data into the mongoDB using worker thread
Right now I have a worker file, whole purpose of worker file is to save the data into the mongoDB and mainjs is sending the name of the agent ...
- 35
2
votes
3
answers
255
views
Empty Worker Threads, What are they?
While debugging a .NET Framework 3.5, WinForms application I spotted some "Worker Thread"s without a name.
I know when you open an application you've got a one worker thread by default. However in ...
- 27.1k
2
votes
2
answers
1k
views
Execute long running operations on the service
I'm building an application which have a Service. I know that all application components run in the same UI process, at least you specify it in the manifest. So to avoid ANR's messages i have three ...
- 1,162