Kuidas saab kontrollida rakenduses aktiivsete voogude arvu?

In Go, to control the number of active threads (goroutines), mechanisms of synchronization and parallelism limitation are commonly used:

• Buffered channels as semaphores: create a channel with limited capacity and send a value into it before starting a goroutine, and receive a value after it finishes, thus limiting the number of goroutines running simultaneously.

• sync.WaitGroup package: helps to wait for a group of goroutines to finish, but does not limit their number.

• golang.org/x/sync/semaphore package: provides a convenient semaphore for limiting parallelism.

Example using a semaphore channel:

sem := make(chan struct{}, 5) // maximum 5 goroutines at the same time

for _, task := range tasks {
    sem <- struct{}{} // blocks if already 5 goroutines are running
    go func(t Task) {
        defer func() { <-sem }() // releases a slot
        process(t)
    }(task)
}

// Wait for all goroutines to finish
for i := 0; i < cap(sem); i++ {
    sem <- struct{}{}
}

This way, you can control the number of active threads and avoid excessive resource consumption.