python : timeit - Tool for measuring execution time
ben+python at benfinney.id.au
Wed Apr 22 07:52:41 CEST 2015
Ganesh Pal <ganesh1pal at gmail.com> writes:
> Iam running the below command on Linux machine have Python 2.7
> installed ,
If it hasn't already been said: You should be targeting Python 3
wherever possible (with the ‘python3’ command).
Since you're not in this case – and you are specifically testing Python
2 features – you should get used to invoking Python 2 specifically, with
the ‘python2’ command.
> I was trying to figure out the speed difference between xrange and
> range functions.
This is the right way to do it. Thank you for actually measuring
> 10 loops, best of 3: 51.1 msec per loop
> Iam not able to understand what why only 10 loops were run ?
What behaviour did you expect? You didn't ask for any particular number
of iterations, so you've allowed the tool to choose for you
The documentation for the ‘timeit’ module specifies what happens when
you omit the “number of iterations” parameter:
If -n is not given, a suitable number of loops is calculated by
trying successive powers of 10 until the total time is at least 0.2
> what does this mean and how does this work ?
I don't know what such a vague question means. Can you read the
documentation and ask some more specific question?
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