If you want to time running something just once, see cputime() and
walltime().
- Robert
On Jul 15, 2009, at 12:12 PM, Gustavo Rama wrote:
> Thanks, I'll try it.
> Cheers Gustavo
>
> On Jul 14, 10:42 pm, Simon King <simon.k...@uni-jena.de> wrote:
>> Hi Gustavo!
>>
>> On 15 Jul., 03:17, Gustavo Rama <gdr...@gmail.com> wrote:
>>
>>> But how con you get the time of execution in a variable?
>>
>> Using cputime or walltime: No problem, since they return a number.
>>
>> Using timeit:
>>
>> Remember that you could obtain a timing doing
>> sage: timeit('f=factorial(400).factor()')
>> 625 loops, best of 3: 955 µs per loop
>>
>> In order to assign the result of the timing to a variable, do
>>
>> sage: T = timeit.eval('f=factorial(400).factor()')
>>
>> Then, the necessary information is contained in the attribute 'stats'
>> of T:
>>
>> sage: T.stats
>> (625, 3, 3, 953.62396240234375, '\xc2\xb5s')
>>
>> So, the first entry gives the number of loops, the second the number
>> of runs, the third I don't understand, the fourth gives the
>> computation time, with units given by the last entry. Anyway:
>>
>> sage: print "%d loops, best of %d: %.*g %s per loop" % T.stats
>> 625 loops, best of 3: 954 µs per loop
>>
>> Note that this only gives the walltime. Note also that it is not so
>> nice to compare different timings: It might be that one timing
>> measures the time in microseconds and the other in milliseconds -
>> IMHO
>> this is an oddity.
>>
>> Cheers,
>> Simon
> >
--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to sage-support@googlegroups.com
To unsubscribe from this group, send email to
sage-support-unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/sage-support
URLs: http://www.sagemath.org
-~----------~----~----~----~------~----~------~--~---
