快速识别和解决Go语言网站访问速度问题的实用方法

package main

import (
    "fmt"
    "os/exec"
)

func main() {
    command := `ab -n 1000 -c 100 http://your-website.com/`
    out, err := exec.Command("bash", "-c", command).Output()
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println(string(out))
}

package main

import (
    "fmt"
    "log"
    "net/http"
    "github.com/prometheus/client_golang/prometheus"
    "github.com/prometheus/client_golang/prometheus/promhttp"
)

var (
    requestCounter = prometheus.NewCounter(
        prometheus.CounterOpts{
            Name: "http_requests_total",
            Help: "Total number of HTTP requests.",
        },
    )
)

func main() {
    http.Handle("/metrics", promhttp.Handler())
    http.HandleFunc("/", handler)
    err := http.ListenAndServe(":8080", nil)
    if err != nil {
        log.Fatal(err)
    }
}

func handler(w http.ResponseWriter, r *http.Request) {
    requestCounter.Inc()
    w.WriteHeader(http.StatusOK)
    fmt.Fprintf(w, "Hello World")
}

func init() {
    prometheus.MustRegister(requestCounter)
}

package main

import (
    "database/sql"
    "fmt"
    _ "github.com/go-sql-driver/mysql"
    "time"
)

var (
    db *sql.DB
)

func main() {
    var err error
    db, err = sql.Open("mysql", "user:password@tcp(localhost:3306)/database")
    if err != nil {
        fmt.Println(err)
        return
    }
    defer db.Close()

    db.SetMaxOpenConns(100) // 设置连接池最大连接数
    db.SetMaxIdleConns(10) // 设置连接池最大闲置连接数
    db.SetConnMaxLifetime(time.Minute) // 设置连接的最大生命周期

    getDataFromDB("SELECT * FROM users") // 查询数据库数据
}

func getDataFromDB(query string) {
    // 先从缓存中查询数据
    data := getFromCache(query)
    if data != nil {
        return
    }

    // 从数据库中查询数据
    rows, err := db.Query(query)
    if err != nil {
        fmt.Println(err)
        return
    }
    defer rows.Close()

    // 处理查询结果
    for rows.Next() {
        var id int
        var name string
        rows.Scan(&id, &name)
        // 处理数据...
    }

    // 缓存查询结果
    putToCache(query, data)
}

func getFromCache(key string) interface{} {
    // 从缓存中查询数据...
    return nil
}

func putToCache(key string, data interface{}) {
    // 将数据存入缓存...
}

package main

import (
    "fmt"
    "github.com/go-redis/redis"
)

var (
    client *redis.Client
)

func main() {
    client = redis.NewClient(&redis.Options{
        Addr:     "localhost:6379",
        Password: "",
        DB:       0,
    })

    err := client.Set("key", "value", 0).Err()
    if err != nil {
        fmt.Println(err)
        return
    }

    val, err := client.Get("key").Result()
    if err != nil {
        fmt.Println(err)
        return
    }
    fmt.Println("key:", val)
}