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Flutter Isolates: Heavy Work Without Jank

by Muhammad Uzair dev.to

7 min read

Flutter apps feel fast until they do not. A scroll stutters, a button tap waits half a second, an animation drops frames — and the cause is rarely the widget tree. More often, the app is doing heavy work on the same thread that draws the UI. Dart runs your code on a single thread, called the main isolate, and while that thread is busy parsing JSON or crunching numbers, it cannot build frames. The…

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Topics Isolates and concurrency

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