thanks David and Vincent for your interesting insights :) i'll start to 
have a look.. 

1 motivation for this feature: when you have two or more implementations of 
the same problem and want to compare them based on running times.

El lunes, 8 de mayo de 2017, 21:24:10 (UTC+2), vdelecroix escribió:
>
> Hello Marcelo, 
>
> Please have a look at 
>
>    https://trac.sagemath.org/ticket/19519 
>
> Vincent 
>
> On 08/05/2017 10:35, mforets wrote: 
> > Hi, 
> > i wanted to know if there is a keyword that can be put next to a doctest 
> to 
> > measure performance with respect to computation time, like: 
> > 
> > sage: possibly_long_calculation(..)  # timeout 600s 
> > 0 
> > 
> > this is seems item 1) in this thread's OP, hence i'm attaching this 
> > question here (but please remove if it's not the case). so i didn't 
> > understand how to apply the proposed solution. where are all supported 
> > doctest keywords stored, to begin with? thanks! 
> > 
> > El jueves, 8 de octubre de 2009, 22:15:01 (UTC+2), John H Palmieri 
> escribió: 
> >> 
> >> On Oct 8, 8:43 am, William Stein <wst...@gmail.com> wrote: 
> >>> On Thu, Oct 8, 2009 at 8:37 AM, Dr. David Kirkby 
> >>> 
> >>> <david.kir...@onetel.net> wrote: 
> >>> 
> >>>> It is possible to increases the timeout time allocated for doctests. 
> >>> 
> >>>> 1) For an individual test? 
> >>>> 2) For all of them? 
> >>> 
> >>>> Perhaps this should be an environment variable, or similar if it is 
> >> not 
> >>>> already. 
> >>> 
> >>> The top of local/bin/sage-doctest says: 
> >>> 
> >>> # if any of the following environment variables are set, use them for 
> >>> # the timeout lengths. 
> >>> TIMEOUT = os.getenv('SAGE_TIMEOUT') 
> >>> TIMEOUT_LONG = os.getenv('SAGE_TIMEOUT_LONG') 
> >>> TIMEOUT_VALGRIND = os.getenv('SAGE_TIMEOUT_VALGRIND') 
> >> 
> >> This should be documented somewhere else, too.  In the developer's 
> >> guide somewhere? 
> >> 
> >>   John 
> >> 
> > 
>

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