package main

import (
	"fmt"
	"os"
	"strings"
	"time"
)

func usingJoin() {
	fmt.Println(strings.Join(os.Args[1:], " "))
}

func forLoop() {
	s, sep := "", " "
	for _, i := range os.Args[1:] {
		s += i
		s += sep
	}
	fmt.Println(s)
}

func main() {
	start := time.Now()
	forLoop()
	t1 := time.Since(start)
	fmt.Println("for loop: ", t1)
	start = time.Now()
	usingJoin()
	t2 := time.Since(start)
	fmt.Println("using join: ", t2)
	fmt.Println("Δ", t1-t2)
}