Dart concurrency
We can run numerous programs or different sections of a program at the same time thanks to Dart’s concurrency. It carries out many instructions simultaneously. The Isolates are a mechanism that Dart offers to perform tasks in parallel. The concurrency makes the program highly effective and throughput by utilizing the unused capabilities of essential operating system and machine hardware.
How to achieve concurrency?
Concurrency in Dart can be obtained by utilizing the Isolates. Dart isolates were covered in a prior session. We shall comprehend its brief introduction here. The thread has a variant called dart isolate. However, there is a significant distinction in how “Thread” and “Isolates” are often implemented. When compared to Thread, the isolation operates differently. The isolates are autonomous workers who communicate by sending messages across channels rather than sharing memories. Isolates requires a mechanism to serialize messages since it accomplishes its goal by passing messages.
Message forwarding is used to facilitate communication between the isolates as a client and server. It facilitates the program’s initialization of multicore microprocessor utilization.
To apply the isolate in our software, use the dart:isolate package, which comes with Dart. It offers a way to take single-threaded Dart code and turn it into something that lets the application utilize the hardware to its fullest.
Example
import 'dart:isolate';
void sayhii(var msg){
print('execution from sayhii ... the message is :${msg}');
}
void main(){
Isolate.spawn(sayhii,'Hello!!');
Isolate.spawn(sayhii,'Whats up!!');
Isolate.spawn(sayhii,'Welcome!!');
print('execution from main1');
print('execution from main2');
print('execution from main3');
}
Output
execution from main1
execution from main2
execution from main3
execution from sayhii ... the message is :Whats up!!
execution from sayhii ... the message is :Hello!!
Output
execution from main1
execution from main2
execution from main3
execution from sayhii ... the message is :Hello!!
execution from sayhii ... the message is :Welcome!!
The dart isolates and the aforementioned code share a similar notion. The output of the program mentioned above will change each time it is executed.
