使用Golang中的curl在网站上对字符串进行grep操作最有效和可扩展的方法是什么？

Background

user@host curl -s http://stackoverflow.com | grep -m 1 stackoverflow.com

returns immediately if the string is found:

<meta name="twitter:domain" content="stackoverflow.com"/>

Aim

find a string on a website using Golang

Method

Based on sources from Go by Example and Schier's Blog the following code was created:

package main

import (
    "fmt"
    "io/ioutil"
    "net/http"
    "regexp"
)

func main() {
    url := "http://stackoverflow.com"
    resp, _ := http.Get(url)
    bytes, _ := ioutil.ReadAll(resp.Body)
    r, _ := regexp.Compile("stackoverflow.com")
    fmt.Println(r.FindString(string(bytes)))
    resp.Body.Close()
}

Results

Running the code results in:

stackoverflow.com

Discussion & Conclusions

1. More code is required to achieve the same aim in Golang or is there a shorter solution
2. Both options seems to return at the same time. Is static code in this case faster than dynamic code as well?
3. I am concerned whether this code consumes too much memory. It should be used eventually to monitor hundreds of different websites

This code implements grep, stopping at the first line that contains the given string. It avoids reading the entire webpage into memory at once by using a bufio.Scanner, which apart from bounding the memory use might also speed up the program in the case where the string is found near the start of a huge page. It's careful to use scan.Bytes() to avoid converting every line into a string, which would cause significant memory churn.

package main

import (
    "bufio"
    "bytes"
    "fmt"
    "log"
    "net/http"
)

func main() {
    resp, err := http.Get("http://stackoverflow.com")
    if err != nil {
        log.Fatalf("failed to open url")
    }
    scan := bufio.NewScanner(resp.Body)
    toFind := []byte("stackoverflow.com")
    defer resp.Body.Close()
    for scan.Scan() {
        if bytes.Contains(scan.Bytes(), toFind) {
            fmt.Println(scan.Text())
            return
        }
    }
}