Coroutines Zero to Hero
summary
Kotlin coroutines are explained with concrete mechanics: how suspend functions compile to continuations, how CoroutineContext composes Job and Dispatchers, and how cancellation propagates so a child launched coroutine is cancelled when its parent is cancelled. Examples show launch, withContext and async/await semantics (500 ms and 1 s delays), a benchmark where 1,000 asyncs use far less memory than 1,000 launches, mutexes are nonreentrant so use carefully, and channels implement backpressure safely (producer suspends instead of overflowing).
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chapters (15)
- 0:00Introduction to coroutines
- 1:28What are coroutines
- 3:52Suspend functions in Kotlin
- 6:02Coroutine context explained
- 8:28Dispatchers and jobs
- 11:16Launching coroutines
- 14:27Context switching with withContext
- 16:11Async operations and await
- 19:23Async vs launch performance
- 20:06Synchronization with coroutines
- 23:57Using mutex for synchronization
- 24:19Channels and back pressure
- 28:12Flows vs RxJava
- 29:15Coroutines for beginners
- 30:20Q&A and closing
