Worker pool pattern trong Go?

func worker(id int, jobs <-chan Job, results chan<- Result, wg *sync.WaitGroup) {
    defer wg.Done()
    for j := range jobs {
        results <- process(j)
    }
}

func main() {
    jobs := make(chan Job, 100)
    results := make(chan Result, 100)
    var wg sync.WaitGroup
    for i := 0; i < 5; i++ { // 5 workers
        wg.Add(1)
        go worker(i, jobs, results, &wg)
    }
    for _, j := range allJobs { jobs <- j }
    close(jobs)
    wg.Wait()
    close(results)
}