Re: Measure http request and response time using curl command

From: Kaushal Shriyan via curl-users <curl-users_at_lists.haxx.se>
Date: Tue, 2 Nov 2021 13:17:23 +0530

On Fri, Oct 29, 2021 at 1:06 AM Daniel Stenberg <daniel_at_haxx.se> wrote:

> On Fri, 29 Oct 2021, Kaushal Shriyan via curl-users wrote:
>
> > Is there a way to measure http request and response time including
> network
> > latency using any utility of a specific website? For example
> > https://about.gitlab.com
>
> Maybe one or more of the --write-out variables?
> https://everything.curl.dev/usingcurl/verbose/writeout


Thanks a lot Daniel for the details and appreciate it. I have used the
below template to find out the response time.

$cat curl-format.txt
{\n
"time_redirect": %{time_redirect},\n
"time_namelookup": %{time_namelookup},\n
"time_connect": %{time_connect},\n
"time_appconnect": %{time_appconnect},\n
"time_pretransfer": %{time_pretransfer},\n
"time_starttransfer": %{time_starttransfer},\n
"time_total": %{time_total},\n
"size_request": %{size_request},\n
"size_upload": %{size_upload},\n
"size_download": %{size_download},\n
"size_header": %{size_header}\n
}\n

When I run the below curl call I see time_total property value keeps
changing.

$curl -v -w "_at_curl-format.txt" https://www.google.com

*Response 1.*
{
"time_redirect": 0.000,
"time_namelookup": 0.004,
"time_connect": 0.006,
"time_appconnect": 0.151,
"time_pretransfer": 0.151,
"time_starttransfer": 0.203,
"time_total": 0.203, --> This property value keeps changing when I run
the above curl call multiple times.
"size_request": 78,
"size_upload": 0,
"size_download": 15295,
"size_header": 732
}

*Response 2.*
{
"time_redirect": 0.000,
"time_namelookup": 0.029,
"time_connect": 0.030,
"time_appconnect": 0.177,
"time_pretransfer": 0.177,
"time_starttransfer": 0.230,
"time_total": 0.231,
"size_request": 78,
"size_upload": 0,
"size_download": 15270,
"size_header": 732
}

*Response 3.*
{
"time_redirect": 0.000,
"time_namelookup": 0.029,
"time_connect": 0.030,
"time_appconnect": 0.177,
"time_pretransfer": 0.177,
"time_starttransfer": 0.229,
"time_total": 0.229,
"size_request": 78,
"size_upload": 0,
"size_download": 15266,
"size_header": 732
}

Please guide and correct me if I am missing anything. Thanks in advance.

Best Regards,

Kaushal

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Received on 2021-11-02