Concurrency in GO

Concurrency in GO

Go's concurrency model is built around goroutines and channels. Unlike threads in other languages, goroutines are lightweight — you can spawn thousands of them without breaking a sweat.

Goroutines

A goroutine is simply a function executing concurrently with other goroutines in the same address space.

go func() {
    fmt.Println("Hello from goroutine")
}()

Channels

Channels are the pipes that connect concurrent goroutines. You can send values into channels from one goroutine and receive those values in another.

ch := make(chan int)

go func() {
    ch <- 42
}()

value := <-ch
fmt.Println(value) // 42

Key Takeaways

• Don't communicate by sharing memory; share memory by communicating.
• Goroutines are cheap — use them liberally.
• Always think about who owns a channel and who closes it.