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From sebb <seb...@gmail.com>
Subject Re: Sum of nested latency
Date Thu, 29 May 2008 15:43:28 GMT
On 29/05/2008, Pieter Ennes <lists@spam.ennes.net> wrote:
> sebb wrote:
>  > On 29/05/2008, Pieter Ennes <lists@spam.ennes.net> wrote:
>  >> Hi all,
>  >>
>  >>  I was wondering why the latency time ('lt') for nested HTTP requests is
>  >>  not propagated to its parent sample, while the normal time ('t') is.
>  >>
>  >>  <httpSample t="1645" lt="0" ts="1212063826434" s="false" lb="HTTP
>  >>  Request" rc="200" rm="OK" tn="Thread Group 1-1" dt="text" by="92031">
>  >>   <httpSample t="428" lt="427" ts="1212063826434" s="true"
>  >>  lb="http://cnn.com/" rc="302" rm="Found" tn="Thread Group 1-1" dt="text"
>  >>  by="260"/>
>  >>   <httpSample t="1217" lt="399" ts="1212063826862" s="true"
>  >>  lb="http://www.cnn.com/" rc="200" rm="OK" tn="Thread Group 1-1"
>  >>  dt="text" by="91511"/>
>  >>  </httpSample>
>  >>
>  >>  In the above snippet, the outer t=1217+428=1645, but the outer lt=0. Is
>  >>  there a reason for this?
>  >>
>  >
>  > Probably because it was overlooked...
>  >
>  > I assume the latency should be saved from the first child, as that was
>  > the first response?
>
>
> I'd say it should be the sum of the two childs, as the behaviour of 'lt'
>  then matches 't'.
>

Latency = time to first response.

I don't think it makes sense to add latencies - likewise one does not
add minima or maxima.

>  Ciao,
>
> --
>
>  - Pieter
>
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