Go concurrency distilled

This mini-book provides a brief overview of many concurrency topics in Go. Each topic comes with interactive examples — feel free to experiment with them by changing the code and clicking Run. There's also a PDF version with static examples. This is a quick refresher on Go concurrency, not a beginner's guide. If you want to learn concurrency from the ground up with practical exercises, check out my other book — Gist of Go: Concurrency. The book is AI-free. Goroutines • Channels • Select • Pipelines • Time • Context • Wait groups • Data races • Race conditions • Mutexes • Semaphores • Signaling • Run once • Object pool • Atomics • Testing • Scheduling • Diagnostics • Final thoughts # Goroutines The foundation of concurrency in Go is goroutines – functions started with the go keyword: func main() { var wg sync.WaitGroup wg.Add(2) go func() { defer wg.Done() fmt.Println("worker 1") }() go func() { defer wg.Done() fmt.Println("worker 2") }() wg.Wait() } worker 2 worker 1 The Go runtime…