Flutter › Flutter Isolates & Multithreading
How does Dart's simple compute function provide a genuinely convenient, considerably simplified shortcut for running a specific function on a completely separate isolate, without needing to manually manage the full underlying isolate lifecycle yourself?
IntermediateAnswer
The compute function provides a genuinely convenient, considerably simplified higher level wrapper specifically around the more complex, lower level process of manually spawning a brand new isolate, sending it a specific function along with its required input data, properly waiting for that spawned isolate to actually finish its work and return an appropriate result, and then correctly cleaning up and disposing of that temporary isolate once it has genuinely finished, all of which compute conveniently handles fully automatically for you behind the scenes, making it a genuinely excellent, considerably simpler default choice for straightforward one off heavy computations that do not actually require any more elaborate, ongoing back and forth bidirectional communication with that spawned isolate.
final result = await compute(parseLargeJson, jsonString);
Map<String, dynamic> parseLargeJson(String json) {
return jsonDecode(json);
}Real-world example A news app uses the simple compute function to parse a genuinely very large incoming JSON response containing hundreds of individual articles entirely on a separate isolate, keeping the main isolate's own user interface perfectly smooth and fully responsive throughout that entire parsing process.