Go 언어 웹 사이트 접속 속도 최적화의 원리와 구현 방법을 해독합니다.

package main

import (
    "fmt"
    "time"
)

func main() {
    start := time.Now()
    result := make(chan int)

    for i := 0; i < 10; i++ {
        go func(n int) {
            time.Sleep(time.Duration(n) * time.Second)
            result <- n
        }(i)
    }

    for i := 0; i < 10; i++ {
        fmt.Println(<-result)
    }

    elapsed := time.Since(start)
    fmt.Printf("执行时间：%s
", elapsed)
}

package main

import (
    "fmt"
    "time"
)

var cache map[string]string

func main() {
    cache = make(map[string]string)

    // 设置缓存
    cache["key1"] = "value1"

    // 获取缓存
    value, ok := cache["key1"]
    if ok {
        fmt.Println(value)
    } else {
        // 从数据库等资源获取数据
        time.Sleep(time.Second)
        value = "value1"
        cache["key1"] = value
        fmt.Println(value)
    }
}

package main

import (
    "fmt"
    "time"
)

func main() {
    start := time.Now()

    // 不优化的代码
    var result int
    for i := 0; i < 1000000000; i++ {
        result += i
    }

    // 优化的代码
    result := (1 + 1000000000) * 1000000000 / 2

    fmt.Println(result)

    elapsed := time.Since(start)
    fmt.Printf("执行时间：%s
", elapsed)
}

package main

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

func main() {
    servers := []string{"http://server1", "http://server2", "http://server3"}

    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        // 负载均衡算法
        server := servers[time.Now().Unix()%3]

        // 代理请求
        resp, err := http.Get(server + r.URL.Path)
        if err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
        }

        // 返回结果
        defer resp.Body.Close()
        w.WriteHeader(resp.StatusCode)
        w.Write([]byte(resp.Body))
    })

    http.ListenAndServe(":8080", nil)
}