Asynchronous Programming in Dart: Futures, async/await, Streams and Isolates
Dart runs on a single-threaded event loop: async/await does not move work to the background, heavy work freezes the UI, and real parallelism needs isolates with separate memory. We compare Future with C#'s Task and Stream with IAsyncEnumerable, measure that parsing a 20 MB JSON on the main isolate stops frames while Isolate.run does not, and show how the error of an un-awaited Future gets lost.
15 Nov 2026
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13 min
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5
