Golang高效处理高并发Web请求技巧

func handler(w http.ResponseWriter, r *http.Request) {
    // 每个请求都在独立的Goroutine中运行
    log.Printf("Handling request from %s", r.RemoteAddr)
    time.Sleep(100 * time.Millisecond) // 模拟处理耗时
    fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])
}

var sem = make(chan struct{}, 100)
func limitedHandler(w http.ResponseWriter, r *http.Request) {
sem <- struct{}{}        // 获取信号量
defer func() { <-sem }() // 处理完成后释放
// 实际业务逻辑
time.Sleep(200 * time.Millisecond)
fmt.Fprintf(w, "Processed")
}

db, _ := sql.Open("mysql", dsn)
db.SetMaxOpenConns(50)
db.SetMaxIdleConns(10)

client := &http.Client{
    Transport: &http.Transport{
        MaxIdleConns:        100,
        MaxIdleConnsPerHost: 10,
        IdleConnTimeout:     30 * time.Second,
    },
}

import _ "net/http/pprof"
func main() {
go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()
// 正常启动服务
}

go tool pprof http://localhost:6060/debug/pprof/profile
go tool pprof http://localhost:6060/debug/pprof/heap