What are the common concurrency patterns in Go?

Go Concurrency Patterns: • Worker Pool: Limit concurrent workers • Pipeline: Chain processing stages • Fan-out/Fan-in: Distribute and collect • Rate Limiting: Control request rate • Circuit Breaker: Fail fast pattern • Timeout: Prevent hanging operations Worker Pool: func workerPool(jobs <-chan Job, results chan<- Result) { for j := range jobs { results <- process(j) } } for w := 1; w <= numWorkers; w++ { go workerPool(jobs, results) } Pipeline: func pipeline() { numbers := generate() squares := square(numbers) print(squares) } Rate Limiting: rate := time.Second / 10 // 10 requests per second limiter := time.Tick(rate) for req := range requests { <-limiter go handle(req) } Timeout Pattern: select { case result := <-ch: return result case <-time.After(timeout): return nil, errors.New("timeout") }