golang-似乎无法删除http连接

Question

I'm trying to measure successive load times of a URL, but have been unable to drop an http connection and start fresh with each measurement. With this code...

func getloadtime (url string) float64 {

    // setup client
    tr := &http.Transport{
        DisableKeepAlives: true}
    client := &http.Client{Transport:tr}

    // page load and measure
    start := time.Now()
    _, _ = client.Get(url)

    return(time.Since(start).Seconds())
}

func main () {
    for i := 0; i < 5; i++ {
        fmt.Println(getloadtime("http://www.google.com"))
    }
}

I get measurements like this:

2.75
0.13
0.09
0.12
0.115

So it appears the http connection is being maintained from the initial load since the subsequent loads are much faster. I have also tried setting "Connection" to "Close" in the header, but get the same results:

req, err := http.NewRequest("GET", url, nil)
req.Header.Set("Connection", "close")
_, _ := client.Do(req)

What am I doing wrong?

Answer 1

I think you need to assign the response from the GET to a variable and then close the connection with response.Body.Close()

func getloadtime (url string) float64 {

    // setup client
    tr := &http.Transport{
        DisableKeepAlives: true}
    client := &http.Client{Transport:tr}

    // page load and measure
    start := time.Now()
    response, _ := client.Get(url)
    response.Body.Close()

    return(time.Since(start).Seconds())
}