https://github.com/cihub/seelog/issues/44

gistfile1.txt

package main

import (
	"crypto/rand"
	"fmt"
	log "github.com/cihub/seelog"
	"io"
	"os"
)

const lines = 100000

var chars = []byte("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789")

func main() {
	logger, err := log.LoggerFromConfigAsString(`
		<seelog>
		 <outputs formatid="common">
		   <filter levels="info,warn,error,critical">
		     <file path="/tmp/seelog-44.log" />
		   </filter>
		 </outputs>
		 <formats>
		   <format id="common" format="%Date %Time%t[%LEVEL]%t%Msg%n" />
		 </formats>
		</seelog>
	`)
	if err != nil {
		fmt.Fprintf(os.Stderr, err.Error())
		os.Exit(1)
	}
	defer logger.Flush()

	for i := 0; i < lines; i++ {
		logger.Info(randomString(256))
	}

	fmt.Printf("lines: %d\n", lines)
}

// Shamelessly stolen from github.com/dchest/uniuri
func randomString(length int) string {
	b := make([]byte, length)
	r := make([]byte, length+(length/4)) // storage for random bytes.
	clen := byte(len(chars))
	maxrb := byte(256 - (256 % len(chars)))
	i := 0
	for {
		if _, err := io.ReadFull(rand.Reader, r); err != nil {
			panic("error reading from random source: " + err.Error())
		}
		for _, c := range r {
			if c >= maxrb {
				continue
			}
			b[i] = chars[c%clen]
			i++
			if i == length {
				return string(b)
			}
		}
	}
}

#!/bin/sh

$GOPATH/bin/example &
$GOPATH/bin/example &
$GOPATH/bin/example &
$GOPATH/bin/example &