Concurrency

go fn() runs fn concurrently with the caller. That's it. No promises, no async/await, no event loop — the runtime multiplexes goroutines over OS threads. Cheap to start (ki…

Channels are typed pipes between goroutines. ch <- v sends, v := <-ch receives. Unbuffered channels are a synchronisation primitive: send blocks until receive completes. Buffer…

select waits on multiple channel operations and runs the case for whichever is ready first. With a default branch it becomes non-blocking. Paired with time.After(d) it become…

sync.Mutex, sync.RWMutex, sync.WaitGroup, sync.Once. The classical concurrency toolbox. Go's culture prefers channels for orchestration and sync for protecting state. Use…