Milline on erinevus koodi täitmisel goroutine'is ja süsteemilõimesüsteemi niidi töös?

Goroutines in Go are lightweight threads managed by the Go runtime, not by the operating system. The main differences:

• Lightweight: Goroutines occupy very little memory (usually a few kilobytes of stack), whereas system threads require much more resources.
• Scheduling: The goroutine scheduler is built into the Go runtime and distributes goroutines across system threads, enabling efficient CPU utilization.
• Creation and switching: Creating and switching between goroutines is faster than between system threads, as it does not require a kernel context switch.

Example:

func main() {
    go func() {
        fmt.Println("Goroutine")
    }()
    fmt.Println("Main thread")
    time.Sleep(time.Second) // Wait for goroutine to finish
}

Here, the goroutine is started inside the process, but does not directly correspond to a separate system thread.