result of os.times() is different with 'time' command Options

[hiral]

On Mar 15, 7:14 am, Tim Roberts <t... at probo.com> wrote:
> hiral<hiralsmaill... at gmail.com> wrote:
> >...
> >Output:
> >real    0.0m0.0100000002421s
> >user    0.0m0.0s
> >sys     0.0m0.0s
>
> >Command:
> >$ time ls
>
> >Output:
> >real    0m0.007s
> >user    0m0.000s
> >sys     0m0.000s
>
> >Is this the intended behaviour?
>
> What is it that you are wondering about?  The formatting difference is due
> to your code.  The difference between 10 milliseconds and 7 milliseconds
> could be due to any number of things.  First, you have the overhead of
> Python involved in your measurements.  Second, you have the variability of
> memory caching and disk caching.  Your Python code causes /bin/ls to be
> loaded into memory, and it's probably still in a file cache when you run
> the second command.
>
> You can't really do an analysis like this with a task that only takes a few
> milliseconds.  There are too many variables.
> --
> Tim Roberts, t... at probo.com
> Providenza & Boekelheide, Inc.- Hide quoted text -
>
> - Show quoted text -

Thanks for your explanation.