Golang

12核心跑满计算质数

 func main()  {
     primes := []int{2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,71,73,79,83,89,97}
     var limit = make(chan int , 12)
     m := sync.Mutex{}
     for i := 100; i < 10000000; i++ {
         limit <- i
         go func(i int) {
             p := true
             for j := 0;j < len(primes); j++ {
                 pri := primes[j]
                 if float64(pri) <= math.Sqrt(float64(i)) && i%pri == 0 {
                     p = false
                     break
                 }
             }
             if p {
                 fmt.Println(i)
                 m.Lock()
                 primes = append(primes, i)
                 m.Unlock()
             }
             <- limit
         }(i)
     }
 }