package main

import "fmt"
import (
    "os"
    "time"
    "flag"
    "bufio"
)

func main() {
    var pRound = flag.Int64("round", 350000, "loop round")
    flag.Parse()

    var message string
    for i := 0; i < 1024; i++ {
        message += "1234567890"
    }
    message += "n"

    f, err := os.OpenFile("server", os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
    if err != nil {
        fmt.Println(err)
        return
    }
    w := bufio.NewWriter(f)

    var i int64 = 0
    round := *pRound
    start := time.Now()
    for i = 0; i < round; i++ {
        w.WriteString(message)
    }
    w.Flush()
    f.Close()
    end := time.Now()

    nanoseconds := end.Sub(start).Nanoseconds()
    speed := 1000000000 * round * 7.0 / nanoseconds

    fmt.Printf("round: %vn", round)
    fmt.Printf("Nanoseconds: %vn", nanoseconds)
    fmt.Printf("speed: %vn", speed)
}