自Go 1.7起就有对此的内置支持。Go
1.7添加了HTTP跟踪，请阅读博客文章：HTTP跟踪简介

您可以指定在发出HTTP（S）请求时在适当的阶段/点调用的回调函数。您可以通过创建值来指定回调函数httptrace.ClientTrace，然后使用来“武装”它httptrace.WithClientTrace()。

这是一个示例函数，该函数获取URL参数，并打印获取它的时间：

func timeGet(url string) {
    req, _ := http.NewRequest("GET", url, nil)

    var start, connect, dns, tlsHandshake time.Time

    trace := &httptrace.ClientTrace{
        DNSStart: func(dsi httptrace.DNSStartInfo) { dns = time.Now() },
        DNSDone: func(ddi httptrace.DNSDoneInfo) {
            fmt.Printf("DNS Done: %v\n", time.Since(dns))
        },

        TLSHandshakeStart: func() { tlsHandshake = time.Now() },
        TLSHandshakeDone: func(cs tls.ConnectionState, err error) {
            fmt.Printf("TLS Handshake: %v\n", time.Since(tlsHandshake))
        },

        ConnectStart: func(network, addr string) { connect = time.Now() },
        ConnectDone: func(network, addr string, err error) {
            fmt.Printf("Connect time: %v\n", time.Since(connect))
        },

        GotFirstResponseByte: func() {
            fmt.Printf("Time from start to first byte: %v\n", time.Since(start))
        },
    }

    req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
    start = time.Now()
    if _, err := http.DefaultTransport.RoundTrip(req); err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Total time: %v\n", time.Since(start))
}

调用它的示例：

timeGet("https://google.com")

输出示例：

DNS Done: 7.998465ms
Connect time: 12.677085ms
TLS Handshake: 128.65394ms
Time from start to first byte: 176.461087ms
Total time: 176.723402ms

另外，请务必查看github.com/davecheney/httpstat，它为您提供了一个CLI实用程序，该实用程序也可以在后台使用该httptracing软件包。