What is the advantage of goroutines compared to threads in terms of efficiency and ease of use?

Goroutines in Go are lightweight threads managed by the Go runtime, not the operating system. Their advantages over traditional threads:

• Small stack size: Goroutines start with a very small stack (about 2 KB), which dynamically grows and shrinks, whereas system threads have a large fixed stack (usually in megabytes).

• Large number: Thanks to low memory consumption, tens and hundreds of thousands of goroutines can be launched simultaneously, which is difficult with OS threads.

• Fast context switching: The Go scheduler manages goroutines in user space, and switching between them is faster than switching OS threads.

• Ease of use: Built-in synchronization primitives and channels make working with concurrency convenient and safe.

Example of creating a goroutine:

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

Thus, goroutines provide an efficient and convenient model for concurrent programming compared to threads.