Bufio example

bufioEx.go

package main

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

/* simple go app showing the use of a buffered writer */
func main() {
  LIMIT, fname := 1000000, "./foo.txt"
  os.Remove(fname)
  s := time.Now()
  fo, err := os.Create(fname )
  if err != nil {
    panic(err)
  }
  defer fo.Close()
  w := bufio.NewWriter(fo)
  for i := 0; i < LIMIT; i++ {
    if _, err := w.Write([]byte(fmt.Sprintf("%d,こんにちわ世界%03d\n", i, i))); err != nil {
      panic(err)
    }
  }
  if err = w.Flush(); err != nil {
    panic(err)
  }
  fmt.Println("Completed in ", time.Since(s), LIMIT, "rows")
}