In the Dart programming language, an Isolate is a single-threaded unit of concurrency.
In the Dart programming language, an Isolate is a single-threaded unit of concurrency. Communication with others Isolates is done via message passing.
Questions tagged [dart-isolates]
296 questions
8
votes
1 answer
How to pass message to isolate and handle error
I am trying to use dart isolate library to improve my application performance.
Look at following code:
import 'dart:isolate';
import 'package:dbcrypt/dbcrypt.dart';
main() {
var pwConPort = new ReceivePort();
pwConPort.listen((data) {
…
softshipper
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8
votes
1 answer
Is it safe to use global variable to share objects between functions in Dart?
I see that "Dart is a single-threaded programming language", so I think is it safe to use global variable to pass data between functions:
var g = 1;
main() {
hello();
world();
}
def hello() {
g = 2;
}
def world() {
print(g);
}
I…
Freewind
- 193,756
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- 708
7
votes
3 answers
Unhandled Exception: Invalid argument(s): Illegal argument in isolate message: (object extends NativeWrapper - Library:'dart:ui' Class: Path)
Can anyone tell me whats wrong in this code?
void onPressed() async {
//Navigator.pushNamed(context, "/screen2", arguments: []);
var receivePort = ReceivePort();
await Isolate.spawn(gotoNext, [receivePort.sendPort]);
final msg =…
Varun Verma
- 73
- 1
- 1
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7
votes
1 answer
Cannot execute Firebase Query within Isolate
I'm developping an app using Flutter. And I want to execute some Firebase queries using Isolate.
But each time I run the app I get this error and nothing is displayed.
Here my code
class HomePage extends StatefulWidget {
HomePage({Key key,…
FQDEV
- 173
- 3
- 13
7
votes
1 answer
Can I pass a BuildContext to Compute?
Is it possible to use BuildContext inside compute function?
Future getFuture() async {
int r = await compute(count, context);
return r;
}
static int count(BuildContext context) {
// Something very slow.
return 10;
}
I receive the…
user987654
- 5,461
- 5
- 23
- 26
7
votes
1 answer
Call async function from Isolate function
I am trying to call an async function from the Isolate function.
class IsolateExample {
final ReceivePort port = new ReceivePort();
IsolateExample(){
Isolate.spawn(isolateFunction, port.sendPort);
}
static isolateFunction(SendPort…
Anil8753
- 2,663
- 4
- 29
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7
votes
2 answers
How to terminate a long running isolate #2
I am trying to understand how I shall port my Java chess engine to dart.
So I have understood that I should use an Isolates to run my engine in parallell with the GUI but how can I force the engine to terminate the search.
In java I just set some…
Gunnar Eketrapp
- 2,009
- 1
- 19
- 33
6
votes
3 answers
How do I fix this Sentry Zone mismatch error?
Framework / SDK versions:
Flutter: 3.10.4
Dart: 3.0.3
Here goes my main() code:
Future main() async {
//debugPaintSizeEnabled = true;
//BindingBase.debugZoneErrorsAreFatal = true;
WidgetsFlutterBinding.ensureInitialized();
…
Void
- 1,129
- 1
- 8
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6
votes
1 answer
Is there currently a way to compute a dart function with webworkers?
I am currently trying to run a A* seek computation on flutter web
class AStarSeeker extends Seeker {
@override
Future Function() seek(SeekComputationInput input) {
return () => compute(doComputation, input);
}
}
Future…
anonymous-dev
- 2,897
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- 112
6
votes
0 answers
Dart isolate is very slow when running a function that returns a very long list
In my Flutter project for Windows, I use the compute function to run some code in an Isolate, in order to avoid freezing the user interface.
But I'm facing a problem: the code I run in the Isolate returns a very long list of double (a few millions…
matteoh
- 2,810
- 2
- 29
- 54
6
votes
1 answer
Shared Preference in flutter Isolate
I'm new to flutter and I just learned how to use isolates in Dart. When I try to access shared preference via an isolate it throws the given below error. This error also appears when I try to access Firebase analytics and remote config. How can I…
Nishuthan S
- 1,538
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6
votes
0 answers
Flutter Uploading a video through DIO package on Isolate
I'm trying to upload a video on my AWS S3 server using dio package.
What is happening:
video's are uploading successfully but the api call blocks the UI thread and it will really slow down the app during upload. All other api calls through dio are…
Minhaj Javed
- 913
- 8
- 20
6
votes
1 answer
Is it possible to get the instance of an existing Isolate in Flutter after reopening the App?
I am using dart isolates to play music in background. I want to get the instance of the isolate that I spawned earlier to stop the music after closing and re-opening the Flutter App.
Is there a way to get the instance of existing isolates after…
Power Coding
- 71
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- 3
6
votes
1 answer
Dart Isolates accessing a shared object instance
I'm currently working with isolates to send queries in parallel to a database server. I have a connector-object to build the connection to the database and I would like to share that across all isolates, so I don't have to create a separate…
torpedro
- 494
- 5
- 13
6
votes
2 answers
Dart Isolate vs Akka
From what I have understood, Dart isolate is like Akka actors.
However, what I couldn't figure out is if dart:isolate serves similar purpose as Akka does. Is there a fundamental difference between the two ?
Is dart:isolate a framework for actor…
lihsus
- 297
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- 12