fibonacci

fibonacci.go

package main

import (
	"fmt"
	"time"
	"runtime"
)

func fibonacci(num int) int {
	if num < 2 {
		return 1
	}
	return fibonacci(num-1) + fibonacci(num-2)
}

func main() {

	ch := make(chan int, 8)
	runtime.GOMAXPROCS(8)
	start := time.Now()

	for i := 0; i < 8; i++ {
		go func() {
			nums := fibonacci(20)
			ch <- nums
		}()
	}

	for i := 0; i < 8; i++ {
		fmt.Println(<-ch)
	}

	fmt.Println("total time:", time.Since(start))
}