Kotlinhard

Dispatchers in Kotlin coroutines: `Default` vs `IO` vs `Main`?

Answer

`Dispatchers.Default` is for CPU-bound work. `Dispatchers.IO` is for blocking I/O (DB/files/network clients that block). `Dispatchers.Main` is for UI. The key rule: don’t block `Main` or `Default`; move blocking code to `IO` using `withContext`.

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