如何通过负载均衡和缓存技术提升Go语言网站的访问速度？

package main

import (
    "fmt"
    "net/http"
    "net/http/httputil"
    "net/url"
    "strings"
)

var servers = []string{
    "http://localhost:8001",
    "http://localhost:8002",
    "http://localhost:8003",
}

func reverseProxyHandler(w http.ResponseWriter, r *http.Request) {
    target, _ := url.Parse(servers[0])
    proxy := httputil.NewSingleHostReverseProxy(target)
    proxy.ServeHTTP(w, r)
}

func main() {
    http.HandleFunc("/", reverseProxyHandler)
    err := http.ListenAndServe(":8080", nil)
    if err != nil {
        fmt.Println("ListenAndServe:", err)
    }
}

package main

import (
    "fmt"
    "net/http"
    "time"

    "github.com/patrickmn/go-cache"
)

var c = cache.New(5*time.Minute, 10*time.Minute)

func cacheHandler(w http.ResponseWriter, r *http.Request) {
    if data, found := c.Get("cache_key"); found {
        fmt.Fprint(w, data.(string))
        return
    }

    // 计算或查询数据
    data := "some data"
    c.Set("cache_key", data, cache.DefaultExpiration)
    fmt.Fprint(w, data)
}

func main() {
    http.HandleFunc("/", cacheHandler)
    err := http.ListenAndServe(":8001", nil)
    if err != nil {
        fmt.Println("ListenAndServe:", err)
    }
}