I need to upload a list of images into a storage, but I don't want to upload and await for every single image after the other, because it takes quite some time. I would like to upload them simultaneously, like in different threads. There is a way to do achieve multithreading with standard dart async? Or should I use Isolates? Do you have some sample code?
2 Answers
You can use them in a single future
final results = await Future.wait([
uploadFunction(image1)
uploadFunction(image2)
]);
you can start uploading all images without waiting for the previous one to complete await will be returned once both uploads are completed
You can use Queue
Whats it will do it will hold your actions and you can do other task while uploading images
import 'package:dart_queue/dart_queue.dart';
main() async {
final queue = Queue(parallel: 2);
final result1 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10)));
final result2 = await queue.add(()=>Future.delayed(Duration(milliseconds: 10)));
//Thats it!
}
By using this you dont need to add await.
NOTE: Make sure app is running while this queue is active.
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