Go中如何有效率地每10秒讀取一次大檔案的最後兩行？

package main

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

const MYFILE = "logfile.log"

func main() {
    c := time.Tick(10 * time.Second)
    for now := range c {
        readFile(MYFILE)
    }
}

func readFile(fname string){
    file, err:=os.Open(fname)
    if err!=nil{
        panic(err)
    }

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

const MYFILE = "logfile.log"

func main() {
    c := time.Tick(10 * time.Second)
    for _ = range c {
        readFile(MYFILE)
    }
}

func readFile(fname string) {
    file, err := os.Open(fname)
    if err != nil {
        panic(err)
    }
    defer file.Close()

    // Determine the size of the file
    stat, statErr := file.Stat()
    if statErr != nil {
        panic(statErr)
    }
    fileSize := stat.Size()

    // Assuming you know the size of each line in bytes (e.g., 62)
    start := fileSize - (62 * 2)

    // Read the last two lines from the file
    buf := make([]byte, 62 * 2)
    _, err = file.ReadAt(buf, start)
    if err == nil {
        fmt.Printf("%s\n", buf)
    }
}