A simple goroutine worker pool. Ref: http://stackoverflow.com/a/18267889

goroutine-pool.go

func worker(linkChan chan string, wg *sync.WaitGroup) {
    // Decreasing internal counter for wait-group as soon as goroutine finishes
    defer wg.Done()

    for url := range linkChan {
       // Analyze value and do the job here
    }
}

func main() {
    lCh := make(chan string)
    wg := new(sync.WaitGroup)

    // Adding routines to workgroup and running then
    for i := 0; i < 250; i++ {
        wg.Add(1)
        go worker(lCh, wg)
    }

    // Processing all links by spreading them to `free` goroutines
    for _, link := range yourLinksSlice {
        lCh <- link
    }

    // Closing channel (waiting in goroutines won't continue any more)
    close(lCh)

    // Waiting for all goroutines to finish (otherwise they die as main routine dies)
    wg.Wait()
}